Accident History Check
Check if a car has been in an accident before you buy. What history checks reveal, what they miss, how to spot uninsured repairs, and how accident history affects value.
What Does an Accident History Check Show?
When a vehicle is involved in a significant accident and an insurance claim is made, the insurer records the damage and assigns a write-off category if the cost of repair exceeds a threshold. These records are held by the Motor Insurance Anti-Fraud and Theft Register (MIAFTR) and the insurance write-off database, both accessible through Experian's automotive data service.
A full VEHIXA vehicle history check searches this database and returns any write-off category recorded against the vehicle — Cat A, B, S, or N — along with the date the record was created. This tells you whether the car was ever deemed an insurance total loss, even if it has since been repaired and returned to the road.
Write-Off Categories Explained
The vehicle is so severely damaged that every part must be crushed and destroyed. No part of a Cat A vehicle may be salvaged or used. If you encounter a Cat A vehicle being sold — walk away and report it.
The body shell must be crushed, but salvageable parts (engine, gearbox, suspension components) may be sold. The vehicle itself must never return to the road. Any Cat B on the road is illegal.
The vehicle has sustained structural damage — to the chassis, crumple zones, or load-bearing bodywork. It can be repaired and returned to the road, but repairs must be carried out to a professional standard and the car must pass an MOT.
Damage is cosmetic or mechanical but non-structural. No damage to the fundamental structure or chassis. Cat N cars are the least serious write-off category and often represent good value when properly repaired.
What Accident History Checks Cannot Show
A vehicle history check only records accidents that were reported to an insurer. A significant proportion of minor accidents — particularly those involving bodywork damage costing less than the owner's excess, or where the at-fault party pays privately to avoid an insurance claim — are never recorded in any database.
Estimates suggest that around 25–30% of accident repairs in the UK are carried out without an insurance claim. These uninsured repairs leave no trace in any database. The only way to detect them is through a careful physical inspection.
How to Spot Uninsured Accident Repairs
Even without a database record, physical evidence of accident repair is often visible on close inspection:
Panel gaps — walk around the car slowly and look at the gaps between panels (bonnet and wings, doors and pillars, boot lid and rear quarters). These gaps should be uniform. Uneven gaps are a sign that panels have been replaced or realigned following an impact.
Paint colour matching — look along the side of the car in natural light at a low angle. Subtle differences in colour shade or paint texture between adjacent panels indicate a repaint on one or more panels. A magnetic paint tester (or a cloth-wrapped fridge magnet) placed against the bodywork will fail to stick to areas with thick filler underneath.
Overspray — check rubber seals around doors, windows, and wheel arches, and plastic trim inside the engine bay, for traces of paint. Overspray in these areas indicates a spray repair where masking was imperfect.
Inside door shuts and under the bonnet — look at the inner surfaces of door apertures and the underside of the bonnet. These areas are often not refinished during accident repairs, so original paint will differ from the exterior if a panel has been resprayed.
Weld seams — factory welds are uniform and consistent. Repair welds are often rougher, differently spaced, or show signs of grinding. Any visible weld work on structural members (sills, A/B/C pillars, floor pan) warrants careful investigation.
Is It Safe to Buy a Car with Accident History?
A Cat N write-off that has been properly repaired to a high standard can be a perfectly safe and economical purchase — particularly if the price reflects the history. Cat N vehicles carry no structural compromise and are often repaired to factory standard.
Cat S vehicles are more complex. Structural damage must be professionally repaired, and an independent structural inspection before purchase is essential. A well-documented Cat S repair — with an engineer's report, structural certification, and full photographic record — gives you the information needed to make a confident decision.
As a rule of thumb, negotiate a 15–25% reduction from the clean market price for any vehicle with a write-off history. A VEHIXA market valuation gives you the current fair market value to start the negotiation from.
Frequently Asked Questions
How do I check if a car has been in an accident?
Run a full VEHIXA check to search the insurance write-off database. For uninsured repairs, carry out a careful physical inspection or commission a pre-purchase inspection from a qualified engineer.
Does a history check show all accidents?
No — only those reported to an insurer that resulted in a write-off categorisation. Uninsured repairs leave no database record.
Is it safe to buy a Cat N car?
Yes, provided the repair has been properly carried out. Cat N is non-structural damage. Inspect the repair quality carefully and negotiate the price to reflect the history.
How much does accident history reduce a car's value?
Typically 10–30% depending on severity and repair quality. Use VEHIXA's valuation to establish the clean price, then negotiate a reduction that reflects the specific history.