A mileage figure that is plainly wrong on an MOT history can be more than an irritating typo. A buyer who sees the odometer apparently moving backwards may reasonably worry about mileage fraud, even where a tester simply entered the wrong number. The good news is that there is an official correction process. The important bit is acting on the right route for the age of the test.

This guide applies to the MOT system in England, Scotland and Wales. Northern Ireland has its own vehicle-testing arrangements.

First, make sure it really is an error

Start with the free GOV.UK MOT history service. Compare the recorded mileage with documents dated around that MOT: the pass certificate, MOT invoice, emissions printout, workshop job card or a service receipt. Check the date too. It is surprisingly easy to compare the wrong visit, particularly where a car had a retest or changed hands around the same time.

A single unexpected reading does not automatically prove a car has been clocked. It can be a digit transposition, a reading entered in miles instead of kilometres on an imported car, or an old instrument-cluster issue. Equally, do not assume that every discrepancy is harmless. If the history shows several unexplained drops or jumps, keep investigating before buying the car or advertising it as problem-free.

The 28-day split: the route depends on when the MOT happened

For a mileage error on an MOT carried out within the last 28 days, ask the MOT centre that performed the test to correct it. GOV.UK says the centre will need to see the vehicle again to check its mileage. The record is then updated to the mileage shown when it is checked, so do not expect a correction based only on a phone call.

For a test that was more than 28 days ago, use the DVSA online service to report a mistake on an MOT record. This is the correct escalation route, not a reason to book a fresh MOT merely to create a newer reading.

What to gather before you ask for a correction

For an older mileage error, the DVSA process asks for your driving-licence number, MOT test number, MOT date, registration number, VIN, and the vehicle’s make, model and colour. Put those together before starting the form rather than trying to complete it from a marketplace advert or a photo of the windscreen.

Crucially, you need evidence that shows both:

  • the mileage that should have been recorded; and
  • a date within one day of the MOT test.

GOV.UK lists an MOT invoice, emissions printout, service receipt or job card from the MOT centre as acceptable types of evidence. A service invoice from months later is useful background, but it does not meet that one-day test on its own. If a scan includes card or payment details, blank them out before uploading it.

Do not confuse a mileage correction with an MOT appeal

If your objection is the mileage figure or another administrative detail, use the record-correction process. If you believe the test result itself was wrong, such as a failure you think should not have been issued, that is a different matter. GOV.UK has a separate MOT appeal process with its own timing and conditions.

Likewise, a correction does not make a dangerous fault safe or undo the roadworthiness rules. A car that has failed with a dangerous defect must not be driven just because there is a separate argument about what appears on its MOT history.

What if the wrong item is not the mileage?

The same DVSA online route can be used where an MOT record has the wrong make or model, colour, country of registration or MOT test centre. The required identification details are broadly similar, so it is still worth having the V5C and the MOT paperwork to hand.

If an MOT test is missing from the history entirely, or a test appears that does not belong to the vehicle, GOV.UK directs drivers to contact DVSA rather than use the ordinary mileage-correction route. Keep the relevant certificate, date, test number and test-centre details. Those cases can look serious to a future buyer, so a tidy evidence trail matters.

How to protect a sale while the record is being corrected

If you are selling before the online history has updated, be open about it. Show the buyer the original MOT paperwork and the evidence you submitted. Do not quietly delete the question from the advert or describe an unexplained mileage drop as a clerical error without proof. A straight explanation plus dated documents is far more credible than an assertion.

Once DVSA has made the change, check the MOT history again and download or print a corrected certificate. Keep the original evidence with the service file. It gives the next owner a simple answer if they notice the old discrepancy in paperwork or a vehicle-history report.

A quick checklist

  • Check the online MOT history and compare it with dated workshop documents.
  • Contact the original MOT centre if the test was within 28 days. Take the car in for the mileage check.
  • For an older test, use the DVSA online correction service.
  • Supply evidence showing the correct mileage dated within one day of the MOT.
  • Use the separate appeal route only if you dispute the test result itself.
  • After a correction, recheck the history and retain the corrected certificate and supporting documents.

Getting a genuine error fixed promptly is sensible housekeeping. It will not hide a car’s real history, nor should it, but it can prevent a simple data-entry mistake becoming a needless obstacle when you come to sell.