Legal guide · 2026
Yes, mileage correction is legal in the UK when it is used to correct an inaccurate reading after a repair, a component replacement or an electronic fault. It becomes a criminal matter only when an altered reading is used to mislead a buyer about a vehicle history or value.
Tell us the vehicle and what the dashboard is showing. We will call you back with a price and the next available slot. Prefer to talk now? Call 07837 078155.
There is no offence in UK law called mileage correction, and no statute makes adjusting an odometer illegal in itself. That surprises people, but it follows logically: the reading is a piece of data held in a module, and modules get replaced, repaired and reprogrammed as a matter of ordinary vehicle maintenance. A law banning the act outright would criminalise a routine part of automotive electronics work.
What the law regulates is the use to which a reading is put. The relevant instrument is the Consumer Protection from Unfair Trading Regulations 2008, which prohibits unfair commercial practices in dealings between traders and consumers. Regulation 5 defines a misleading action as one that gives false information about a product, or presents information in a way that deceives, and that causes the average consumer to take a decision they would not otherwise have taken.
A vehicle advertised with a mileage the seller knows to be wrong is squarely within that definition. The odometer reading is one of the two or three facts that most influences what a buyer will pay. Presenting a false one to secure a sale is a misleading action, and Part 3 of the same regulations makes it a criminal offence.
In every case where the displayed figure has stopped matching the distance the vehicle has genuinely covered, for a reason that has nothing to do with the sale price. In practice that means:
In all of these the correction moves the reading towards the truth. That is the test worth applying: does this work make the vehicle record more accurate, or less?
Clocking is the everyday word for reducing a reading to make a vehicle appear less used than it is, ahead of a sale. It is the same technical operation, applied dishonestly, and the difference is intent and consequence rather than method.
| Situation | Lawful? | Why |
|---|---|---|
| Recalibrating after a documented cluster replacement | Yes | Restores an accurate reading; no consumer is misled |
| Converting a documented import from km to miles | Yes | Aligns the display with evidenced distance |
| Correcting after a proven sensor fault | Yes | The vehicle was under-recording genuine distance |
| Reducing the reading before advertising the car | No | A misleading action under the 2008 Regulations |
| Setting a figure with no supporting evidence | No | Nothing establishes it as accurate |
| Correcting properly but telling the buyer nothing | Risky | Omitting a material fact can itself be misleading |
If you are selling the vehicle, yes – and this is the part sellers most often get wrong. The 2008 Regulations catch misleading omissions as well as misleading actions. A recalibration you carried out entirely properly, then said nothing about, can still leave a buyer misled about the vehicle history.
The practical answer is simple and it costs you nothing. Keep the written record of the reading before and after the work and the reason for it, keep the invoice for the cluster or ECU that caused it, and hand both over with the service history. A documented correction that a buyer sees up front is a non-event. The same correction discovered later, unexplained, is the thing that ends up in a dispute.
More than most people assume, which is exactly why doing it honestly is also the practical choice. The mileage recorded at every MOT since 2005 is published on the GOV.UK MOT history service and can be looked up by anyone with the registration number. Trade history checks pull the same data. Service records, warranty claims and finance settlements add more.
So a corrected reading does not erase anything. It sits alongside a public record that shows the previous figures, which means the paperwork explaining the correction is not optional housekeeping – it is the thing that makes the public record make sense. Our technicians across London, Essex and Kent issue that written record on every job for precisely this reason.
Enforcement sits with Trading Standards, and prosecutions under the 2008 Regulations can result in fines and, in serious cases, imprisonment. Beyond the criminal side, a buyer who was misled has civil rights to redress under Part 4A of the same regulations, which can include unwinding the contract or claiming a discount and damages.
For a trader, the reputational side often bites harder than the penalty. For a private seller, the risk of an unwound sale months later is very real. In both cases the exposure comes not from the technical work but from what was said about the vehicle afterwards.
Four questions separate a professional from a problem.
If you need the work doing, we cover London, Essex and North London from our Walthamstow workshop, on a mobile basis or in the unit.
No. Owning or driving a vehicle whose reading has been corrected is not an offence. The regulated conduct is selling a vehicle while misrepresenting its mileage or history.
Yes, and a good one will if the evidence does not support the figure requested or if the purpose looks like a sale rather than a repair. Refusing is the correct professional response.
Mileage is recorded at the MOT, not tested against a standard. The tester notes whatever the odometer shows on the day, which is why the correction is best done before the test rather than after.
Check the GOV.UK MOT history first, because it usually shows where the reading stopped making sense. If you bought from a trader and were misled, you have rights to redress under Part 4A of the 2008 Regulations, and Trading Standards can act on the criminal side.
No. The technical operation can be the same, but clocking specifically means reducing a reading to make a vehicle appear less used before a sale. Correction restores an accurate figure after a genuine fault or repair.
If a repair or an electronic fault has left your vehicle showing the wrong figure, call 07837 078155 and we will explain what the job involves and what you will get in writing.
