Your service records: what to keep, how to file it, and what it proves
Keep a car file that answers the next question: what was done, when, by whom and for how much, what was declined, which recalls were checked, and, for a used car, what the title and odometer records show.
- Start here: the essentials
- What to keep, and why
- The service log: concern, cause, correction
- When you sell: what records show, and what to hand over
- Buying a used car: title, odometer, recalls, records and an inspection
- Records in depth: makers compared, the full field list, odometer rules, NMVTIS and the Buyers Guide
- See it: Sam's purchase and Gloria's file
- Practice: build the car file
- Your car
- Check your work
- Knowledge check and scenario
Start here Essentials
For a first pass: put the papers you have in one place, log the last service, fill in the car's facts, and keep the habit after each visit. Buying a used car? Read buying a used car before you pay.
- Gather every invoice in one place. One folder, or scans in one folder on your phone or computer (what to keep, filing).
- Enter the last service on the service log. Date, odometer and what was done, from the invoice (the service log; the Service log sheet).
- Fill in the car facts. VIN, tire size, the oil the maker requires, and the warranty end dates (Car facts).
- After each visit, file the invoice and any declined work the same day. (declined work; the Recommendations sheet.)
Minimum time: about 45 minutes, more if the papers are scattered. Done when: the service log has the last service, the car facts sheet is filled, and Your car file exports.
What to keep, and why Understand
A car's records answer four people's questions: a warrantor deciding a claim, the next technician deciding what is due, the next owner deciding what to pay, and you deciding the next list of recommendations. The paper that answers them is mostly paper you are handed anyway. Keeping it is a matter of not throwing it away and putting it in one place.
The Federal Trade Commission's page on auto warranties (April 2024) puts it directly. You do not have to use the dealer for maintenance to keep a warranty, and routine work done elsewhere is not a reason to deny coverage, but you should keep records of oil changes, tire rotations, belt replacement, new brake pads and inspections. Without them, it says, a claim might be denied (FTC, Auto Warranties and Auto Service Contracts). Recalls, warranties and service contracts covers what an independent shop can and cannot do under a warranty.
| Keep | Why | Who says so |
|---|---|---|
| Invoices (completed repair orders) for every visit, including oil changes and free work | They list each repair, the parts and their cost, the labor and the odometer readings in and out | FTC; New York DMV; California BAR (the invoice lists no-charge work too) |
| Estimates and how you authorized them | They show what you agreed to before the work | New York DMV lists estimates, work orders and receipts among the records to keep |
| Inspection reports and recommendations, with what you declined | They show what was seen, when, and what you decided | ASE's C1 task list has advisors explain declined and deferred work on the invoice |
| Receipts for parts and fluids from work you do yourself, with the date and odometer | They are the proof of maintenance when no shop was involved | EPA says owners who do their own maintenance keep logs and receipts |
| Recall and warranty repairs, even at no charge | NHTSA's VIN search does not show recalls already repaired, so your invoice is the record | NHTSA; California BAR |
| Repair guarantees, the warranty booklet, any service contract, and the purchase papers | They set the terms, dates and miles that later claims run against | New York DMV lists guarantees and warranties; the booklets are the makers' |
Sources for the table: the FTC's Auto Repair Basics for what a completed repair order lists; New York DMV's Know Your Rights in Auto Repair for the records list; California BAR's Maintenance and repairs for the invoice; ASE's C1 Study Guide (PDF); EPA's Emissions Warranties Questions and Answers (PDF); NHTSA's recall lookup. The invoice rules are New York's and California's; other states' rules differ, and the FTC's list is guidance, not a national rule. Ask the authority
Shops keep records too, but not for you and not forever. California requires repair shops to keep their records for at least three years (BAR, Write It Right); that is one state's minimum. After that, or after a shop closes, your copy may be the only one.
What your warranty booklet says about records
Every maker's warranty booklet or owner's manual has a paragraph on records. Read yours; makers word it differently, and the wording is the one that applies to your car. Product-specific Two 2026 examples:
- Toyota's 2026 Warranty and Maintenance Guide (Tacoma) says to keep detailed records, with the date, the mileage and a description of the service or parts, and to give them to the next owner if you sell. It says Toyota "will not deny a warranty claim solely because" you have no records, and that damage or failure caused by lack of proper maintenance is not covered (Toyota, 2026 Tacoma Warranty and Maintenance Guide (PDF)).
- Hyundai's 2026 Tucson Plug-in Hybrid owner's manual says maintenance and "record retention are the owner's responsibility", and that you need the records to establish that you met the warranty's maintenance requirements (Hyundai, Owner's responsibility).
Both say a failure caused by missing maintenance is not covered. They differ on what missing paper alone does. Under either wording, the records are how you show the maintenance happened. EPA's position on emissions warranty claims, and a side-by-side of the makers, are under Go deeper.
Records support a claim; they do not guarantee one. This chapter says what makers and agencies state about records, not how a warranty dispute ends: that is settled by the warrantor's process, and where it is disputed, by your state attorney general or consumer agency and, where needed, a lawyer. We give no figure for what records add to a car's resale value, because we found no reliable one. Ask the authority
The service log: concern, cause, correction
An invoice is the shop's record. The service log is yours: one line per visit or job, in date order, with the same columns every time, so the history reads as a list rather than a stack of paper. The Service log sheet holds it.
The heart of each line is the three Cs: the concern (what you noticed or asked for, in your words), the cause (what the technician found) and the correction (what was done). The ASE Education Foundation's 2026 standards require accredited technician programs to teach repair-order documentation using the three Cs (ASE Education Foundation, Automobile Program Standards (PDF)), and WardsAuto's 2021 report of an industry webinar describes work orders centered on concern, cause and correction (WardsAuto, service staffers and the three Cs). Some trainers say "complaint" for the first C; one paid advisor course teaches complaint, cause, correction (JC Training, Service Advisor Excellence course page, listed as a reference). Writing your log the same way means your record and the shop's line up. Convention
| Column on the Service log | What to write | Example (Priya's brake fluid, fictional) |
|---|---|---|
| Date; odometer | From the invoice; it shows the odometer in and out | The visit date; 98,400 |
| Shop; invoice number | Name as on the invoice, and its number, so the paper can be found | Her independent shop; the invoice number |
| Concern | Your words: what you asked for or noticed | "Oil change; inspection sent by text" |
| Cause | What was found, with any measurement or code | "Schedule item, every 3 years; no change since 2021" |
| Correction | What was done | "Brake fluid exchanged" |
| Parts and type; fluids and spec | Part names and whether new from the carmaker, new from another maker, used or rebuilt; fluid type and the specification the manual names | Brake fluid, with the specification as written on the invoice |
| Labor hours; cost | From the invoice lines | 0.8; $130 before tax |
| Repair warranty | Months and miles, as on the invoice; "none stated" if none | As on the invoice |
| Paid how; filed where | Card, cash or other; where the paper or scan is | "Car folder; scan in the car file folder" |
Write "unknown" rather than leaving a cell blank when the paper does not say. A cell marked unknown tells the next reader the question is open. This manual's convention
Work you do yourself goes on the log the same way, with the parts receipt. EPA says owners who maintain their own cars should keep logs and receipts, and Toyota's 2026 guide says owner-paid maintenance may be done by you or any automotive service. The receipt shows the part or fluid and its specification; the log shows the date and the odometer. This manual teaches the owner's checks, not repairs; Oil, fluids and filters covers checking levels.
Three other sheets complete the file. The Car facts sheet holds what does not change from visit to visit: the VIN, the oil and coolant the maker requires, tire size and placard pressures, the 12-volt battery's install date, and each warranty's end date and miles. The Recalls and bulletins sheet holds each recall check with its date. The Recommendations sheet holds what shops suggested and what you decided.
Filing invoices: one place, in date order
Our method is one folder for paper, newest at the front, and one folder of scans with the same papers. This manual's convention Name each scan so it sorts by date and says what it is: year, month and day, then odometer, shop and work, such as "2026-05-14 38000 tire rotation". Keep the paper; the scan is the copy you can search, send to a shop and keep if the paper is lost.
- The same day. File the invoice and enter the log line the day of the visit, while you remember the concern in your own words.
- Write what is missing. A visit with no invoice still gets a log line, marked "no invoice; from memory".
- Export the car file. The sheets live in this browser. Your car file exports every sheet to one file you can keep with the scans, imports it on another device, and prints it. The VIN and every other entry stay in this browser unless you export or print them; the share link does not carry them.
Recommendations and declined work on the record
Work you said no to, or put off, is part of the car's history. ASE's C1 task list has service advisors document recommended services performed or declined, and explain the declined or deferred work on the invoice. Ask for it to be written there; then it is on the shop's record and on yours. The Recommendations sheet keeps each item with the measurement, the shop's mark, your decision and its recheck point, and Discussing recommendations explains how those decisions are made.
A declined item does two jobs in the file. It shows a later shop what was measured and when, so a trend can be read. And it is honest history: if a declined item was a schedule item, the record shows that too. Toyota's guide, for example, says a failure caused by lack of proper maintenance is not covered.
When you sell: what records show, and what to hand over
New York's DMV tells drivers to keep all records, including estimates, invoices, work orders, receipts, guarantees and warranties, and says they could increase your vehicle's resale value. That is the only agency statement we found on records and resale, and it gives no figure. We found no reliable figure for how much records add, so this manual gives none. California BAR says a copy of every service record is useful to show warranty work or when you sell, and Toyota's guide says to give the records to the next owner. Convention
When you sell, keep your own copy (export Your car file and keep the scans) and hand over copies of the invoices and a printed log. Cover anything on a receipt you would not hand a stranger, such as part of a card number or a home phone number.
The odometer statement
The federal odometer disclosure rule (49 CFR Part 580) calls for a written mileage statement when a car changes owners, and section 580.17 sets out which vehicles are exempt (eCFR, 49 CFR 580.17). For a passenger car, the exemption depends on the model year, which is on the registration and the title:
| Model year | Written odometer statement at transfer |
|---|---|
| 2010 and older | Exempt once the car is at least 10 years past January 1 of its model year, which every one of them now is |
| 2011 and newer | Required until 20 years after January 1 of the model year. The regulation's example: during calendar year 2031, model year 2011 and older are exempt |
How the statement is made is set by your state's title agency. Ask the authority The Go deeper section has the rest of the exemptions.
A history report scam aimed at sellers
The FTC warned in 2018 about would-be buyers who ask a seller to buy a vehicle history report from a site they name, to collect the seller's personal and card details. Its advice is to ask why and think twice, and to use vehiclehistory.gov, which lists approved NMVTIS report providers (FTC, Steering clear of vehicle history report scams).
Records and the repair-or-replace question
Whether to keep repairing a car or replace it is your decision, and this manual gives no financial advice and no rule for it. Records make the question answerable. These are the questions we suggest weighing, with the sheet that answers each: This manual's convention
- What did the car cost in repairs and maintenance over the last 12 months? (The cost column of the Service log.)
- What is coming due on the schedule, and what is open on the recommendations? (The Maintenance schedule and Recommendations sheets; the Yearly upkeep calculator totals the schedule.)
- Is the current repair a one-time failure or part of a pattern? (Repeated causes on the log.)
- Is there rust or collision damage that a technician says affects the structure, or a safety feature you want and the car lacks? (Ask the technician; Consumer Reports names rust, collision damage and safety features among the factors in its 2016 guide to replacing a car.)
- What would a replacement cost you, all in, and how would you pay for it? (Your own figures; a financial adviser if you want one.)
Buying a used car: title, odometer, recalls, records and an inspection
Before you pay for a used car, check what public records and the seller's records can tell you, then have someone independent look at the car. Do the checks in this order, because each one can end the purchase before the next costs anything. The order is ours; the checks come from the FTC, the Justice Department and NHTSA. This manual's convention
- At a dealer, read the Buyers Guide. The FTC's Used Car Rule requires dealers to post a Buyers Guide in every used car they offer: a window sticker that says whether the car is sold "as is" or with a warranty, and lists major systems. The FTC says the Guide overrides anything in the sales contract, and that it tells buyers to get a history report, check for recalls and have the car inspected by an independent mechanic before they buy (FTC, Buying a Used Car From a Dealer; FTC, Dealer's Guide to the Used Car Rule). The rule covers dealers that sell more than five used vehicles in a 12-month period. It is written for dealers, so do not count on a Buyers Guide in a private sale.
- Run an NMVTIS report on the VIN. See the next section for what it shows.
- Compare the odometer. The dash against the title, the NMVTIS reading and the readings on the seller's invoices.
- Check recalls by VIN. NHTSA's free lookup shows open safety recalls (Recalls, warranties and service contracts). Write the date and the result on the Recalls and bulletins sheet.
- Ask for the records, and read them against the schedule. Find the maker's schedule (Your maintenance schedule) and mark what the invoices show done and what is due or unknown.
- Have the car inspected by a mechanic you choose, before you buy. Bring the findings back as a list and put them through the four questions (Discussing recommendations).
What NMVTIS holds, and what it does not
The National Motor Vehicle Title Information System (NMVTIS) is a federal database run by the Justice Department's Bureau of Justice Assistance. It is designed to protect consumers from fraud and unsafe vehicles and to keep stolen vehicles from being resold (VehicleHistory.gov, NMVTIS). A title brand is a label a state records on a car's title, such as junk, salvage or flood.
| An NMVTIS report shows | It does not show |
|---|---|
| The current state of title and the last title date | Repair or maintenance history |
| Brand history (junk, salvage, flood) | Damage that was not declared a total loss or branded |
| The most recent odometer reading in the state's title record | A complete odometer history |
| Total loss history | Vehicles from states not yet providing data, or data not yet updated |
| Salvage history | Recalls (check those by VIN at NHTSA) |
Sources: Understanding an NMVTIS Vehicle History Report for the five indicators; the NMVTIS consumer disclaimer (PDF), which says NMVTIS does not contain detailed repair history, that some states do not yet provide data, and that a report "is NOT a substitute for an independent vehicle inspection." Reports are sold by approved providers listed on VehicleHistory.gov's provider page, which says the order implies no preference.
Commercial history reports from private companies sometimes carry more, such as accident and repair history (FTC, Used Cars). The FTC says such a report may list accidents and flood damage but typically will not list mechanical problems, and is not a substitute for an independent inspection (FTC, Buying a Used Car From a Dealer). The FTC endorses no provider, and neither does this manual.
Checking the odometer
NHTSA estimates that more than 450,000 vehicles are sold each year with false odometer readings (NHTSA, Odometer Fraud). Its checks use exactly the papers this chapter keeps: compare the title's mileage with the odometer, and compare both with maintenance or inspection records and any oil change stickers. Each invoice carries an odometer reading, so a seller's invoices give a series of dated readings that should rise in order. NHTSA says tampering with a digital odometer is even harder to detect, and that the car's condition and a detailed history report are the best clues. Report suspected odometer fraud to your state's enforcement agency, as NHTSA directs. Ask the authority
A clean NMVTIS report or a clean commercial history report does not tell you the car's mechanical condition. NMVTIS says its report is not a substitute for an independent inspection, and the FTC says the same of history reports. Records a seller hands over show what was done, not what was skipped. An inspection by a mechanic you choose, before you pay, is the check on condition; this manual does not judge any car. Ask the authority
Records in depth: makers compared, the full field list, odometer rules, NMVTIS and the Buyers Guide Go deeper
Makers and EPA on records, side by side
| Source | What it says about records | What it does not say |
|---|---|---|
| Toyota, 2026 Tacoma guide | Keep detailed records (date, mileage, work or parts); give them to the next owner; no claim denied solely for missing records; failure from lack of maintenance not covered; take records to an emissions claim | That records must come from a dealer |
| Hyundai, 2026 Tucson Plug-in Hybrid manual | Record retention is the owner's responsibility; records establish compliance with the warranty's maintenance requirements | Whether a claim is denied solely for missing records; that records must come from a dealer |
| FTC, April 2024 | Keep records of oil changes, rotations, belts, brake pads and inspections; a claim might be denied otherwise | How a particular maker handles a claim |
| EPA, emissions warranty Q&A (2009, revised 2012) | Proof of maintenance is not required for a defect claim, but may be requested when poor maintenance likely caused the failure; owners who do their own maintenance keep logs and receipts | That the dealer must do routine maintenance |
The models are examples; your booklet's paragraph is the one that applies. Recalls, warranties and service contracts covers the emissions warranty itself.
The full field list
The Service log keeps the columns most visits need. A full record of one visit, as we would write it, adds: the shop's address, phone and any state registration or license number; odometer in and out; codes and measurements under cause; for each part, its brand, part number and quantity; the labor rate; parts, labor, fees and tax as separate amounts; who authorized the work and how (for a phone approval, the date, time and name); whether old parts were returned or shown; whether the work was recall or warranty work at no charge; the next due point from the schedule; and the attachments (estimate, inspection report, scan). This manual's convention The Service log notes column takes whatever does not fit.
Odometer disclosure: the other exemptions
Besides the model-year rules above, 49 CFR 580.17 exempts vehicles with a gross vehicle weight rating over 16,000 lb and vehicles that are not self-propelled. NHTSA's own summary of the exemption is shorter and less exact than the regulation, so read the regulation. NHTSA's further checks: on a car with 20,000 miles or fewer, it says the tires should be the originals, and it suggests looking at wear on the pedals against the mileage shown.
NMVTIS in more detail
NMVTIS's disclaimer says some states update their data in real time and others once every 24 hours or within a period of days, and that insurer and junk or salvage yard reporting began on March 31, 2009. Its report page calls the reports intentionally concise, generally shorter than commercial reports, and says a clean report is a good result. The provider page says consumers cannot get NMVTIS reports from Carfax, DMVDesk or Experian, which provide NMVTIS information only to dealerships. Providers charge for reports.
The Buyers Guide's boxes
The FTC's dealer guide describes the Guide's warranty section: a box for "As Is-No Dealer Warranty", a box for "Implied Warranties Only", or a dealer warranty with its terms, and a list of the major mechanical and electrical systems. The FTC's consumer page says a Spanish Guide is available when the sale is conducted in Spanish. The sales contract is to say that the information on the window form is part of the contract. Ask the dealer to explain any box you do not understand, and your state attorney general's consumer office what an "as is" sale means where you live. Ask the authority
One publication's repair-or-replace rule
Consumer Reports' 2016 guide gives a rule of thumb: start shopping when a year's repair bills exceed a year's worth of car payments, while noting that paying an occasional $1,000 bill to keep an older car running might save money (Consumer Reports, How to Decide If You Need a New Car). It is one publication's rule from 2016. We found no agency or extension source with a rule, and we did not find the "50 percent of the car's value" rule sometimes credited to Consumer Reports or AAA on either one's site. The questions in the chapter are this manual's frame; the rule is not.
See it: Sam's purchase and Gloria's file See it
Sam Okafor is a fictional person; every fact about them and their car is invented for this manual. Sam is 27 and uses they/them. In May 2026 they bought a 2021 electric hatchback with 38,000 miles from a private seller, who handed over three invoices. They drive about 9,000 miles a year on roads salted every winter. Their maker's schedule (fictional) lists tire rotation every 7,500 miles, the cabin filter every 2 years, a brake fluid test every 4 years, and brake cleaning every year in salted areas. The battery warranty is 8 years or 100,000 miles from the in-service date and transfers to later owners.
Known, before buying: an NMVTIS report on the VIN showed a clean title and an odometer reading consistent with the dash, and no repair history, which is what NMVTIS says it does not hold. NHTSA's VIN lookup showed no open recalls; Sam logged the check with its date on the Recalls and bulletins sheet. It was a private sale, and the seller offered no Buyers Guide (the FTC's rule is written for dealers). A 2021 model year car is under 20 years old, so the sale came under the written odometer statement rule; how it was made on the title is the state's procedure.
Assumed: that the seller's three invoices are the whole service history. Under that assumption, Sam can read when the car's rotations and brake cleaning were last done from the invoices' dates and odometer readings, and enter those on the Service log as the starting history. Sam also lines up the invoices' odometer readings by date against the 38,000 at purchase, one of NHTSA's checks.
Open, and who settles it:
- The battery warranty's end date. It runs from the in-service date, which the papers Sam has do not show. A dealer for the maker reads it from its records by VIN; Sam writes the date, and the 100,000 miles, on the Car facts sheet. Hybrids and electric cars covers battery warranties.
- The 12-volt battery's age. Unknown; the shop tests it at the next visit, and the result goes on the log.
- Anything done between the invoices. Unknown; written as "unknown" on the log rather than left blank, and treated as due by the method in Your maintenance schedule.
Sam's file after the first evening: three invoice scans named by date and odometer, three log lines, the recall check, and car facts with the battery warranty's end date marked open. When a dealer later offers a maintenance package, the file is what Sam compares it against (Discussing recommendations).
Gloria Hernández is a fictional person; every fact about her and her car is invented for this manual. She is 71 and uses she/her. Her 2011 gasoline midsize sedan has 162,000 miles. Her son, Luis Hernández (he/him), helps by phone. The check engine light came on steady; a parts store read a misfire code for one cylinder. On the highway the light began flashing and the car shook; she left the highway and had it towed.
Known: the shop's diagnosis, $140 for one hour, found a failed ignition coil on that cylinder; the estimate for the repair is $310. Her VIN shows no open recalls, though the search leaves out recalls more than 15 years old (Recalls, warranties and service contracts). Her log line reads: concern "check engine light steady two weeks, then flashing on the highway, car shook"; cause "misfire on one cylinder; ignition coil failed"; correction "ignition coil replaced"; cost from the invoice.
Assumed: that the invoice will match the $310 estimate. The invoice settles it, and the log takes the invoice's figure.
Open, and who settles it: whether the catalytic converter was damaged. The shop marks it "watch" until a test after the repair and a few days' driving; Gloria logs it on the Recommendations sheet with that recheck point, and the test settles it. Repair or replace: Gloria and Luis go through the questions in the repair-or-replace section with her log and recommendations open. The manual gives them no rule; the decision is theirs, and the converter test is one of the facts they wait for. If she sells, a 2011 model year car still needs the written odometer statement until calendar year 2031, when the regulation exempts it.
- Understanding an NMVTIS Vehicle History Report: the five things a report shows.
- FTC, Auto Warranties and Auto Service Contracts: the records to keep and why a claim may need them.
- Toyota, 2026 Warranty and Maintenance Guide (PDF): one maker's records paragraph, with a maintenance chart to fill in.
- NHTSA, Odometer Fraud: how to compare the odometer with title and service records.
Practice: build the car file Practice
Minimum: every invoice you have in one folder or one scan folder, the last service on the Service log with date, odometer and work done, the Car facts sheet filled in (with "unknown" where you do not know), and one export of the car file. Time: about 45 to 60 minutes, more for a car with years of paper. Materials: invoices and receipts; the owner's manual or warranty booklet; the registration or title for the VIN; a folder; a phone or scanner; the Service log, Car facts and Recalls and bulletins sheets (or paper).
- Gather. Glove box, kitchen drawer, email (search for the shop's name and "invoice"), the shop's customer portal if it has one. If a shop you used kept your history, ask it for copies.
- Sort and name. Paper in date order, newest at the front. Scan each one and name it by date, odometer, shop and work.
- Log the last service. One line with the three Cs, the parts and fluids, the cost and the repair warranty. Older invoices can wait.
- Fill the car facts. The VIN from the registration or the lower left corner of the windshield; the oil specification and tire size from the manual and the door placard; warranty end dates from the booklet and the in-service date. Write "unknown" for what you cannot find.
- Check recalls. Run the VIN at NHTSA and log the date and result.
- Export. Open Your car file and export it; put the file beside the scans.
Back-fill the history. Enter the older invoices on the log, oldest first, then compare the log with the maker's schedule on the Maintenance schedule sheet: each item's last done date and odometer come from the log. Rehearse a used-car check. On your own car, read the title's mileage, the newest invoice's odometer and the dash, and see that they rise in order; then look at what an NMVTIS report would and would not add.
Your car Your car
Check your work Check your work
Criteria
- Are all the invoices you have in one place, paper and scans, in date order?
- Does the Service log have the last service with date, odometer, concern, cause and correction?
- Does the Car facts sheet have the VIN, the oil specification, the tire size and each warranty's end date, or "unknown" with who can settle it?
- Is there a recall check with its date?
- Does the car file export, and is the export kept with the scans?
- If you are buying, did the title, odometer, recall and records checks come before payment, and is an inspection by a mechanic you chose on the list?
Worked example
Sam's file has three scanned invoices named by date and odometer, three log lines, a dated recall check showing none open, and car facts with the battery warranty's 100,000 miles and an end date marked "open: dealer reads in-service date by VIN". It passes: the open facts are written as open with the person who settles them. It does not say the car is in good condition; the NMVTIS report and the invoices do not show that. Gloria's file has the coil repair on the log in three Cs and the converter on the Recommendations sheet with its recheck point. It also passes, and it does not answer repair or replace; it gives her and Luis the figures to weigh.
Common mistakes
- Keeping only the big repairs. The FTC's list starts with oil changes and rotations; those are the records a maintenance question asks for.
- Leaving out free work. Recall and warranty repairs belong in the file, and NHTSA's search does not show recalls already repaired.
- Blank cells. Write "unknown" so the next reader knows the question is open.
- Only one copy. The sheets live in one browser; export the car file and keep the paper.
- Reading a clean history report as a clean car. NMVTIS holds title, brand, odometer, total loss and salvage data, not condition. An inspection checks condition.
- Quoting a resale figure. We found no reliable one.
What is still unresolved
How a warranty claim is decided is settled by the warrantor, and a dispute by its process, your state agency or attorney general: Recalls, warranties and service contracts covers the warranties, and Choosing a shop and handling problems covers disputes with a shop. Which items are due is settled by your maker's schedule (Your maintenance schedule). A used car's condition is settled by an inspection, and its recalls by NHTSA's VIN lookup. How your state handles the odometer statement and title transfer is settled by your state's title agency.
Knowledge check and scenario
You did your own oil changes. What does your record need for a warranty question about the engine?
Toyota's 2026 guide says it will not deny a claim solely because you have no records. Does that mean records do not matter for a Toyota?
An NMVTIS report on a car you are looking at is clean. What does that tell you?
Your car is a 2012 model. Does a written odometer statement apply when you sell it in 2026?
(Go deeper) What does EPA say about proof of maintenance for an emissions warranty defect claim?
Checklist
Have you just done what this manual teaches? If it is still fresh, we would like to hear about it. We are looking for volunteer guides to add a few short passages from their own experience to this manual. Write to guides@learnthings.online for the details.