MOT Mileage Discrepancies
Quick answer
A discrepancy means the recorded mileage sequence does not rise the way it should. It may indicate clocking, but a keying error at the test station, a replaced instrument cluster or a reading recorded in kilometres will all produce the same pattern. Treat it as a question that must be answered with documents before you pay, not as a verdict.
Check the actual vehicle
Checking a vehicle?
Enter its registration to check the official tax, MOT and mileage record free. If you need provenance for a purchase or ownership decision, add finance, stolen and write-off checks.
Free: vehicle identity, tax/SORN, MOT history, mileage and buyer red flags.
Full history: adds outstanding finance, stolen, insurance write-off and other paid provenance checks.
The full report is optional. Review the free official record first if you are unsure. Payment is completed securely on the next screen.
Roughly in order of how often each one turns out to be the answer.
- A typing error at the test station — a transposed digit or a missing zero
- A reading recorded in kilometres among readings in miles: 120,000km reads as 74,500 miles
- A replaced instrument cluster, which legitimately restarts the odometer
- A digital odometer fault, or a cluster repaired after water damage
- An import whose earlier readings were taken in another unit or another country
- Deliberate adjustment — clocking — to lift the asking price
Do not accept a vague explanation for a material drop. Every innocent cause above leaves a paper trail, and a seller who has one will produce it.
- Dated service invoices showing mileage either side of the gap
- An invoice for instrument-cluster or odometer work, naming the vehicle
- The current dashboard reading, photographed against the registration
- A consistent account of miles versus kilometres across the history
- Evidence that a wrong MOT reading was corrected with DVSA
- Wear that matches the true mileage: pedals, seat bolster, steering wheel, gear knob
If the seller's explanation is documented and the documents match, a discrepancy can be closed out — plenty of honest cars carry one. If it is not, walk: you will be the one explaining it to the next buyer, and you will take the same discount you are refusing to ask for now.
Adjusting an odometer is not itself a criminal offence in the UK, but selling a vehicle without disclosing it can be, under the Consumer Protection from Unfair Trading Regulations 2008 and the Fraud Act 2006. If you believe a trader has sold a clocked car, report it to Trading Standards through the Citizens Advice consumer service.
The free analysis compares successive available readings after accounting for their recorded units, and reports an inconsistency as a warning rather than a fraud finding. The paid check adds mileage readings collected outside the MOT system, which is what turns a single odd reading into a pattern — or clears it.
- Can an MOT mileage record be wrong?
- Yes. Readings are typed in by a person at the test station, so entry mistakes happen. Verify the sequence against documents and the car itself.
- Does a mileage discrepancy always mean clocking?
- No. Keying errors, replaced instrument clusters and kilometre readings all produce the same pattern.
- How do I check a mileage discrepancy?
- Run the free mileage check to see every MOT reading in order, then ask the seller for invoices covering the gap.
- Can a mileage discrepancy be corrected?
- A wrong MOT entry can be raised with DVSA and the test station. Ask for evidence that it was, rather than taking the explanation on trust.
- Is buying a clocked car illegal?
- Buying is not, but selling one without disclosing the adjustment can be an offence. You would also own a car worth less than you paid.
- Does a discrepancy affect the car's value?
- Yes, and it follows the car. Even when explained, it is a question every future buyer will ask.
Check the actual vehicle
Turn the guide into a check on the car
Advice is useful, but the decision is about one registration. Check its official record free, then add the paid provenance report before money changes hands.
Free: vehicle identity, tax/SORN, MOT history, mileage and buyer red flags.
Full history: adds outstanding finance, stolen, insurance write-off and other paid provenance checks.
The full report is optional. Review the free official record first if you are unsure. Payment is completed securely on the next screen.