More cars are sold with manipulated mileage than with any other form of misrepresentation. And the ones to worry about are not always the ones with obviously implausible numbers.
Everyone knows to be suspicious of a ten-year-old car claiming 12,000 miles. That's obvious. The fraud that catches people is the car with perfectly plausible mileage — 60,000 miles, eight years old, nothing alarming on the face of it — where the condition of the car tells a completely different story.
That's the check most buyers never make. Here's how to make it.
How odometer fraud actually works today
The phrase "clocking" comes from an era of mechanical odometers — physical dials you could wind back with a drill. Most people know that phrase. Fewer know that it barely applies anymore.
Modern cars have digital odometers. You cannot wind them back mechanically. What you can do is plug a device into the car's OBD port — the same port a garage uses for diagnostics — and reprogram the mileage electronically. It leaves no trace on the instrument cluster. The display looks completely normal. The number is wrong.
The other method is simpler: disconnection. Sever the signal feed to the odometer and miles stop registering. The car keeps being driven. The clock stops moving. This is why a year showing very low mileage in a MOT history is worth understanding — not automatically a red flag, but worth a question.
How to check the MOT history — and what to look for
Every MOT test conducted in the UK records the mileage of the vehicle at the time of the test. The government holds this data and makes it freely available. Go to gov.uk and search for "check MOT history." Enter the registration number. The full test history appears — every pass, every fail, every advisory, and every mileage recorded.
This takes thirty seconds and costs nothing.
Plot the mileage at each test across the life of the car. It should form a broadly consistent upward line. A car driven normally accumulates miles in a predictable pattern. The exact number varies — a commuter covers more than a weekend car — but the shape of the history should make sense.
Green flags: consistent year-on-year growth, annual mileage that makes sense for the type of car, every test showing higher mileage than the one before.
Worth investigating: one year with dramatically fewer miles than the others, a gap where no MOT was recorded, or mileage that appears to go backwards between tests.
Apply context before drawing conclusions. A year with very low mileage is not automatically suspicious. During 2020 and into 2021, millions of cars sat on driveways. A car showing 800 miles in 2020 is not alarming — it is normal. Look at the years either side. Does the history make sense as a whole?
Similarly, a SORN period creates a gap in the MOT history. That is not fraud. It is administration. What you are looking for is low mileage or gaps that have no obvious explanation, particularly in years where nothing unusual was happening, or patterns that repeat across multiple years.
A dealer who becomes defensive when you ask about a specific year in the MOT history is telling you something. A confident seller with nothing to hide explains it in one sentence.
The check most buyers never make: does the wear match the miles?
This is where the real skill is — and it requires no tools, no databases, and no money. Just eyes and a basic understanding of what genuine use looks like.
Don't just look for suspiciously low mileage. Look at the condition of the car. Does the wear match what the clock says? High wear on a car claiming low mileage is a significant flag. But the reverse is also useful — low wear on a car with high claimed mileage can be genuinely reassuring. A mostly motorway car at 100,000 miles can have a surprisingly tidy interior because motorway miles are kind miles. Context matters.
Here's what to check:
The single most reliable physical indicator. The same foot, the same pressure, thousands of times. A car claiming 30,000 miles with pedal rubber worn through to the metal has covered considerably more.
The outer edge takes the same pressure every time someone slides in. Leather and fabric both wear here in ways that are hard to disguise convincingly.
Drivers grip in the same places every journey. Leather wears, stitching thins, the material flattens at 10 and 2. A heavily worn wheel on a claimed low-mileage car is a question worth asking.
Smooth and shiny with thousands of gear changes. Hard to fake, easy to check.
Every entry and exit leaves a mark in the same places. Paint wears, plastic scuffs, chrome dulls with genuine use.
Constantly used, never thought about. The hinge loosens, the fabric sags, the mirror cover stops snapping cleanly. These are the honest marks of a car that has been lived in.
Dirt and wear accumulate around the pedal area in patterns that reflect genuine use. A heavily worn or soiled footwell on a supposedly low-mileage car is worth noting.
Degrade with age as much as use — UV and heat break down the rubber regardless. Perished wipers on a supposedly lightly used car suggest it's older or more driven than presented.
Cross-reference the service history against the MOT
If the car has a stamped service book, check it against the MOT history. Find a service stamp dated in the same month or year as an MOT test. Do the mileages match? A car serviced at 12,000 miles but showing 18,000 on the MOT taken in the same month has a discrepancy that needs an explanation.
Go further: call the garage. Ask if they serviced a car with that registration. Legitimate garages keep records. A stamp that no garage can verify tells you something important about when — and whether — the service actually happened.
What no check tells you with certainty
A careful mileage manipulation carried out years ago — before the current run of MOT tests — may not show up in the history at all. If the fraud predates the digital record, or was done between tests, the database will look clean.
This is why the physical checks matter so much. The database can be manipulated. The pedal rubber cannot. The seat bolster cannot. The steering wheel cannot. These are the honest record of how far that car has actually been driven, and they don't lie.
For significant purchases: a professional pre-purchase inspection by a qualified mechanic gives you an expert assessment of whether the car's overall condition is consistent with its claimed mileage. That inspection is worth the cost on any purchase above a few thousand pounds. An HPI or similar check will flag known mileage discrepancies on the national database — but only what has been reported and logged. A valuable additional layer, not a complete picture.
The short version
Run the free MOT history on GOV.UK. Look for consistent mileage year on year. Apply context — a quiet year in 2020 is lockdown, not fraud.
Then look at the car. Pedals, seat, steering wheel, door sills, gear knob. Does the wear match the miles? That is a question the car answers honestly, regardless of what the clock says.
Mileage is one part of the picture. A car with a clean history and genuine wear can still be a bad buy if the seller isn't who they say they are, or the transaction itself has red flags. That's what a full check looks at — the car and the deal together.
Have you Legit checked it?
Before the viewing. Before the test drive. Before the bank transfer. Run the free check on the registration first.
Run the free check See the full report