Blog / Spotting clocked mileage

Buying · 5 min read

How to Spot a Clocked Car Using MOT Mileage History

Clocking, winding back a car's odometer to make it look like it's covered fewer miles, is illegal, but it still happens, and it's one of the easier forms of used car fraud to catch if you know where to look. Every MOT test records the odometer reading at the time, which creates a public paper trail that's hard to fake retroactively.

What a normal mileage history looks like

Most cars accumulate mileage at a broadly consistent rate year to year, with some natural variation. A car doing mostly short local trips might add 4,000 to 6,000 miles a year; a motorway commuter car might add 12,000 to 15,000. What matters isn't hitting some specific number, but whether the trend across several tests looks plausible for how the car's apparently been used and described to you.

The clearest red flag

A mileage reading that's lower than a previous test is the single clearest sign something's wrong. Genuine mileage only goes up. A drop between two tests, even a small one, means either a clocked odometer or a replacement instrument cluster, and either way it's worth walking away from unless the seller can produce solid paperwork explaining it.

Softer signs worth checking

Beyond an outright drop, a few patterns are worth a second look:

• A sudden, large jump in one year followed by unusually low mileage the next, which can indicate a clock was wound back partway through ownership rather than from the start.
• Mileage that doesn't match wear you can see or feel: heavily worn pedal rubbers, a sagging driver's seat bolster, or worn steering wheel stitching on a car claiming very low mileage.
• A gap in the MOT record where a test seems to be missing, which can sometimes coincide with when a discrepancy was introduced.

Cross-checking against what the seller tells you

The most useful thing about MOT mileage history is that it's independent of the seller entirely. It comes from the tester's own record at the time, not from anything the current owner has entered or could edit. Pulling it up before you view the car and comparing it against what the listing or the seller tells you takes under a minute, and it's one of the few checks that can't be talked around in person.