A clean Carfax report can make a used car feel like a safe bet. The listing looks good, the salesperson hands you the history, and “no accidents reported” seems to settle the question. That phrase, however, means exactly what it says. It tells you what Carfax has on file, and it cannot promise the car was never damaged or that earlier repairs were done right.
At Nylund’s Collision Center in Englewood, Colorado, we inspect vehicles after other shops have repaired them. Some of those cars arrive with problems their owners never suspected. Below, we explain where vehicle history data comes from, why gaps happen, how reports have been altered in documented cases, and what you can do before you sign.
In the companion video, Eric Reamer walks through these issues and shows the Subaru we discuss later in this article.
Why Buyers Want More Than a Clean Carfax Report
On November 2, Repairer Driven News reported on a survey of just over 2,000 used car buyers in the United Kingdom, conducted for the online retailer Cazoo. More than two thirds said they worried about hidden faults or undisclosed damage. Meanwhile, 45% were concerned about unclear vehicle histories, and 61% said a full history report would raise their confidence.
Those are British buyers, and the survey measured concern rather than confirmed problems. Still, the same worries apply here. A used car often costs tens of thousands of dollars, and most people plan to keep it for years. You want to know whether it was wrecked, whether it was maintained, and whether someone repaired damage in a way that affects safety or value.
For many American shoppers, the first stop is a vehicle history report. So it pays to understand what those reports actually contain.
Where a Clean Carfax Report Gets Its Information
Carfax gathers records from many sources. These include government agencies, law enforcement, insurance companies, repair facilities, and other businesses that keep vehicle records. That is a large pool of data, and it can be genuinely useful.
The catch is that the report can only reflect what reaches the company. On its own customer support site, Carfax states that “not every accident or damage event is reported.”
Two Ways Damage Never Reaches the Report
The first gap is simple. Some accidents never get reported to anyone. An owner might pay for repairs out of pocket, or nobody ever filed a police report.
The second gap is less obvious. Carfax also acknowledges that some events reported somewhere else never get passed along to Carfax. In other words, a record can exist in one system and still be missing from the report you’re reading.
Neither gap makes a history report worthless. Reported history beats no history at all. But a clean Carfax report is a statement about records, not a certification of the car’s condition.
How Common Is Previous Vehicle Damage?
In July 2025, Carfax estimated that roughly 110 million vehicles on American roads had sustained some form of damage. By the company’s estimate, that is about 40% of vehicles in operation.
That figure needs context. The estimate counts vehicles with any damage history, including minor incidents that received proper repairs. It does not mean 40% of cars carry hidden damage or bad repairs. What it does show is that prior damage is common. As a result, the quality of the repair matters as much as the fact of the accident. A clean Carfax report and a correct repair are two different things.
Accident Reported? The Repair Quality Is Still Unknown
Suppose the report shows a collision three years ago, and the salesperson says the shop fixed it. That answer leaves the important questions open:
- Which parts did the shop replace?
- Were they original equipment (OEM), aftermarket, or recycled parts?
- Did the shop follow the manufacturer’s repair procedures?
- If the structure took damage, did technicians use proper measurements and repair methods?
- Did anyone calibrate the cameras, radar sensors, and other driver assistance systems the repair affected?
A vehicle history report generally won’t answer any of these. Usually only repair records, photos, or a physical inspection will.
A Subaru That Looked Repaired
We covered this vehicle in an earlier episode of The Airing of GRIEVEances, and it shows exactly how a car can return to the road with problems the next owner can’t see.
The Subaru came to Nylund’s for a post-repair inspection. Subaru built it with an aluminum hood, and engineers designed the factory hood supports for that weight. During the previous repair, someone swapped in an aftermarket steel hood, which weighs considerably more.
The original supports remained in place, and they could not reliably hold the heavier hood open. Picture someone checking the oil or adding washer fluid when the hood drops. That is a real injury risk. Based on our inspection, heavier duty supports matched to that hood did not exist, so our team had to prop it open by hand to keep working.
The Warning Label Described the Exact Problem
On the underside of the aftermarket hood, a sticker told the installer to confirm that the original supports could handle at least 25 kilograms, or to replace them with stronger ones. It warned that skipping this step could let the hood collapse and seriously injure fingers, hands, arms, shoulders, neck, back, or head. The label even misspelled “possible” as “poossible.”
That typo is a small thing. What matters is that the part’s own manufacturer warned about the exact failure we found, and the car still went back into service.
The hood wasn’t our only concern. We also found significant damage involving the frame rails, which raised far more serious questions about the earlier repair. According to the history of this case, the seller had marketed the car as having passed a 120-point inspection.
What a Multi-Point Inspection Usually Covers
Dealers often advertise 100-point, 120-point, or larger inspections. A thorough inspection can provide useful information. Even so, the number of points tells you nothing about what someone actually examined.
Checking tires, lights, fluids, and basic mechanical function answers one set of questions. Evaluating prior structural repairs, replacement parts, and adherence to OEM procedures is a different kind of inspection. A buyer who hears “inspected” alongside a clean Carfax report may reasonably assume both happened. Often, only the first one did.
Ask for the actual checklist. Then look for whether it covered:
- Signs of previous collision repair
- The vehicle’s structure and frame
- Evidence of improper or mismatched replacement parts
- Driver assistance systems and any required calibrations
- Repair documentation from prior claims
A dealer may have done exactly the inspection it advertised. The real question is whether that inspection addressed what you care about.
Aftermarket Parts and Who Checks the Fit
The Subaru also raises a question about replacement parts. Many auto policies allow the insurer to pay for parts the original manufacturer didn’t make. Depending on the policy and state law, the insurer may specify certain aftermarket parts.
Policy language, however, does not change the engineering of the car. If the original hood is aluminum and the replacement is heavier steel, someone has to account for that difference. The supports still have to work. Hinges and attachment points still have to suit the part, and any relevant manufacturer procedures still apply.
The insurer has obligations under the policy and the law. Meanwhile, the repair facility is responsible for evaluating the repair and doing the work properly. Those roles differ, and the details of each claim matter. Even so, the owner has a reasonable expectation that the finished repair is safe.
At Nylund’s, we believe the manufacturer’s repair procedures should guide the repair. When an alternative part prevents a safe installation, someone needs to solve that problem. If nobody can, someone should explain why the estimate included that part at all. Eventually that car gets sold, and the next owner inherits every one of those decisions without knowing anyone made them.
When the Clean Carfax Report Itself Has Been Changed
Gaps in data are one concern. Altered reports are another, and documented cases exist.
In New Jersey, Giaime v. Discount Auto reached the Appellate Division in 2018. According to the opinion, the buyer received a dealer-provided Carfax report showing no accidents or damage. After problems surfaced, she obtained a second report that showed prior damage. The trial court entered a default judgment for the buyer under the state Consumer Fraud Act, and the appellate court affirmed the judgment, damages, and attorney fees. That outcome rested on its own facts, including the dealer’s default, but it shows a consumer receiving a report that did not match Carfax’s records.
In 2017, Fox 5 Atlanta investigated a Georgia dealership. Reporters pulled a Carfax report directly from the company for a Nissan Pathfinder with severe accident damage, then requested the report from the dealer. The dealer’s version made the damage look much less serious. However, the dealership denied altering Carfax reports, and this was a news investigation, not a court finding.
These examples support one simple habit. Pull a current report yourself, directly from the provider, or verify the dealer’s copy through the provider’s official service. You can also run a title check through the National Motor Vehicle Title Information System, a U.S. Department of Justice program that tracks title brands such as salvage and junk. Keep in mind that an authentic report still has the limits described above.
This article is general consumer information, not legal advice. If you believe a seller misrepresented a vehicle, talk with an attorney licensed in your state.
Get an Independent Inspection Before You Buy
The Federal Trade Commission advises used car buyers to have an independent mechanic inspect the vehicle before buying, even when the seller says it already passed an inspection. We agree with that advice.
For concerns about prior collision damage, a qualified collision repair professional can spot issues a routine mechanical inspection may miss. Typical warning signs include uneven panel gaps, paint overspray, welds or sectioning on structural parts, non-OEM components, and missing calibration records.
No inspection is perfect. Some damage hides behind panels, and some conditions require disassembly or specialized testing to confirm. Still, an independent evaluation gives you information you would not otherwise have before a major purchase. Even a clean Carfax report is no substitute for someone putting trained eyes on the car.
A Used Car Checklist That Goes Beyond the Clean Carfax Report
Think of a clean Carfax report as a starting point. Before you sign, work through these steps:
- Pull your own history report directly from the provider rather than relying on a printed copy.
- Run an NMVTIS title check to look for salvage, junk, or flood brands.
- Ask the seller directly about previous accidents and repairs, and write down the answers.
- Request repair documentation for any reported collision, including invoices, photos, and parts lists.
- Get the inspection checklist behind any advertised multi-point inspection.
- Ask about calibration records for cameras and radar if the car has driver assistance features.
- Schedule an independent inspection, and include a qualified collision repair facility if you suspect a significant collision.
Questions to Ask the Seller
- Has this vehicle been in any collision, reported or not?
- Who performed the repairs, and do you have the paperwork?
- Were OEM, aftermarket, or recycled parts used?
- Which items did your inspection actually cover?
- Can I take the car for an independent inspection before I commit?
What a Clean Carfax Report Really Means
Every vehicle has a history. Part of it may appear in a report. The rest might live in repair records, insurance files, photos, or the physical condition of the car itself. Your job as a buyer is to learn how much of that history is available, how reliable it is, and what it actually tells you.
So the next time someone says a used car has a clean Carfax report, ask one more question. Does that mean the car was never damaged, or does it mean Carfax has no record of the damage? And if an accident does show up, how much do you know about the quality of the repair?
At Nylund’s Collision Center, we work with damaged vehicles and manufacturer repair procedures every day. Whether you’re repairing your own car or buying someone else’s, you deserve to understand what you’re getting. If you have questions about a vehicle’s prior repairs, our team is glad to help.