Salvage History Check - Is Your Car a Write-Off?
Check if a vehicle has been written off by an insurer. Understand Cat N, Cat S, Cat C, and Cat D categories — and run a free MOT history check to spot signs of past accident damage.
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UK Insurance Write-Off Categories Explained
Understanding the write-off category tells you how seriously a vehicle was damaged and what it means for roadworthiness.
Category S
Structural damage. The vehicle has damaged chassis, crumple zones, or suspension mounting points. Can be repaired and returned to the road but must undergo DVLA re-inspection and re-registration before being sold.
Category N
Non-structural damage. Damage is limited to non-structural components such as panels, airbags, electronics, or cosmetic items. Can be repaired and sold without DVLA re-inspection — but repairs must still be carried out properly.
Category C (old)
The pre-2017 equivalent of Cat S. Structural damage where repair cost exceeded the vehicle's value. Category C vehicles were required to be re-registered after repair. Still appears on pre-2017 write-off records.
Category D (old)
The pre-2017 equivalent of Cat N. The vehicle was written off for non-structural reasons or where repair cost was high relative to value but not necessarily structurally compromised. Less serious than Cat C.
How MOT History Helps Identify Past Accidents
MOT history does not directly record write-off status, but the data reveals telling patterns that point to past accident damage.
Gaps in MOT History
A year or more with no MOT test can indicate the vehicle was off the road following a serious accident. Sellers rarely volunteer this information, but the DVSA records do not lie.
Mileage Anomalies
Mileage that drops, stays flat for a long period, or jumps dramatically can indicate the vehicle was sitting unrepaired for months or was sold to a repairer who clocked it.
Structural Advisories
Advisory notices mentioning subframe condition, sill corrosion, or suspension mounting points — particularly on a relatively new vehicle — can be red flags for poorly repaired accident damage.
Sudden Improvement in Pass Rate
A vehicle that repeatedly failed MOTs, then suddenly passed cleanly and was sold, may have received only superficial repairs to get it through the test rather than a thorough accident repair.
Change of Test Station
A sudden change in test station — particularly to a different region — can indicate the vehicle changed hands after an incident, potentially at auction, where it is common for salvaged vehicles to re-enter the market.
Full Write-Off Check
For certainty, our full vehicle history check includes insurance write-off category data sourced from insurance databases. Upgrade from the free MOT check for complete salvage history verification.
Why Checking Salvage History Matters
Buying a written-off car without knowing it can have serious financial and safety consequences.
Safety Risk
Poorly repaired structural damage compromises the vehicle's crumple zones and safety cage. In a subsequent accident, the vehicle may not protect occupants as designed. Airbag deployment timing can also be affected by structural misalignment.
Financial Loss
A written-off vehicle is worth significantly less than an equivalent clean-history example — typically 20-40% less depending on category and repair quality. Buying one at full market price means an immediate and substantial loss in value.
Insurance Problems
Insurers require you to disclose known write-off history when taking out a policy. If you are unaware of the history and the insurer discovers it during a claim, they may reduce a payout or decline to pay entirely on the basis of non-disclosure.
Salvage History Check — FAQ
Common questions about write-off categories and salvage history checks.
What is a salvage history check?
What do the write-off categories mean?
Can a written-off car be safe to drive?
How does MOT history help identify a write-off?
What should I check before buying a car with write-off history?
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MOT data sourced from the DVSA. Write-off and salvage category data sourced from insurance industry databases. Last updated: April 2026.