The odometer went backwards: the biggest mileage drops in our records

Some cars lose more than 100,000 km between one owner and the next. We looked at how often it happens, why it happens, and how you can spot it before it becomes your problem.

Anna

Vehicle history research

A mileage history is supposed to move in one direction only. These six cars did the opposite.

For most cars, the mileage story is straightforward. Every service visit, inspection and insurance claim adds another reading, and each one should be higher than the last. When a later reading is lower, something has happened.

We went through the mileage histories behind recent MrVIN checks to see how often this happens and what those cases actually look like.

How often mileage goes backwards

Among the cars in our records with at least two mileage readings, 9.7% had a later reading that was at least 1,000 km lower than an earlier one.

That doesn't mean 9.7% of cars had their odometers turned back. There are three common reasons for a lower reading: a typing error, a replaced instrument cluster, or an odometer that was deliberately turned back.

A replaced cluster leaves a recognisable pattern. The mileage drops close to zero and then starts climbing normally again. To separate those cases from the rest, we kept only drops where the earlier mileage was physically possible, at no more than 60,000 km a year, and where the next two readings stayed low. In other words, the drop was never corrected.

Of those drops, half were larger than 10,000 km, a quarter were larger than 50,000 km, and about one in ten exceeded 100,000 km.

For comparison, the European Parliament's research service estimates that odometer manipulation affects 5% to 12% of used cars sold within a country and 30% to 50% of those sold across borders, at a cost of between 5.6 and 9.6 billion EUR a year.

Damaged cars go backwards more often

In August we found that cars with a damage record had their odometers wound back about twice as often as cars without one. We ran the same test on a newer, separate set of checks, and the pattern held.

Cars with a damage record were between 1.7 and 2.2 times as likely to show a backwards reading as cars without one. The gap holds however many readings a car has, which matters, because more readings give a drop more chances to appear.

The six biggest mileage drops in our records

These are six of the biggest mileage drops we've found in our records. The table below puts them side by side. Under each car, you'll see its mileage history drawn the same way it appears in a MrVIN report.

The figures compare the highest recorded mileage with the lower reading that came afterwards. Highlighted rows lost more than 100,000 km. For the Porsche, the lowest later reading is shown.

The readings mentioned throughout this article come directly from our records. The points between them in each chart are illustrative.

BMW 5 Series Touring (2013): 184,619 km gone

Dealer service records show the mileage climbing steadily from 22,147 km in 2014 to 300,602 km in the Netherlands in 2021. The same car later appears in Germany in 2026 showing just 115,983 km.

BMW 7 Series (2016): 155,509 km gone

This car was recorded at 324,805 km in the Netherlands in 2024. The next reading is zero, which is exactly the pattern you'd expect from a replaced instrument cluster. Then, in 2025, a German dealer records the car at 169,296 km.

The replaced cluster explains the zero reading. It doesn't explain why the mileage came back at 169,296 km rather than 324,805 km.

BMW 5 Series (2004): 147,996 km gone

The mileage reaches 318,536 km in 2010 and then drops to 170,540 km just nine months later.

After that, the readings continue to rise normally from the lower figure. That's exactly what makes cases like this hard to spot.

Once the drop has happened, everything afterwards looks perfectly consistent.

BMW 325i (2009): 99,010 km gone

The car shows 320,166 km in 2020 and then 221,156 km in 2021.

Its next recorded appearance is an insurance claim in Poland at 255,640 km, so the lower mileage carried over into the next stage of the car's ownership.

Porsche Panamera (2010): two odometers at once

The mileage is recorded at 134,086 km in France in 2013 and then at 64,855 km in 2017.

Things get even stranger in 2019, when one dealer records 118,712 km and another records 73,338 km just two weeks later. No car loses 45,000 km in two weeks. One of those readings was wrong, and at the time a buyer would have had no way of knowing which one.

BMW 4 Series Coupe (2014): 54,186 km gone

The car has a Swiss service history up to 143,406 km in 2022. The next recorded reading is 89,220 km in 2023, after which the car moves on to Greece.

Five of these six examples are BMWs. That doesn't mean BMWs have their odometers turned back more often.

BMW dealers record the mileage at every service visit, so when a BMW's mileage drops, it leaves a clear paper trail. Plenty of other cars do the same without anyone recording it.

Why odometers get turned back

After age, mileage is the biggest factor in a used car's value, and changing that number costs little.

The same BMW Touring is worth far more at 115,000 km than at 300,000 km.

Cross-border sales make it easier to hide. Four of our six biggest drops happened while the car was moving between countries: twice from the Netherlands to Germany, once from Switzerland to Greece, and once on into Poland.

Each country keeps its own records, and a buyer in one rarely sees the history from another. That's the gap behind the European Parliament's cross-border figures. At the time of its research, only six EU countries treated odometer manipulation as a criminal offence.

Where records are connected, the problem almost disappears. Belgium's Car-Pass and the Dutch NAP register record the mileage at every service, repair and inspection, and the same research found they cut manipulation to 1% of used cars or less. We covered how the numbers get changed, and what it costs buyers, in our guide to mileage manipulation.

Your ten minutes with the car

• Put every mileage reading you can find into date order: service book, invoices, inspection certificates and oil change stickers. The numbers should only ever go up.
• Be cautious if the service history starts unusually late, or if an older car comes with a brand new service book.
• Compare the wear inside the car with the mileage shown. A worn steering wheel, a shiny gear knob, a flattened driver's seat bolster or worn pedal rubbers don't fit a low reading.
• Ask whether the instrument cluster has ever been replaced, and ask for the paperwork if it has. A replacement should carry the original mileage forward.
• Many modern cars store the mileage in more than one control unit. A dealer's diagnostic check can compare them.
• If the car was imported, ask for the records from its home country. Cars from the Netherlands and Belgium come with a national mileage record.
• If the car has a damage record, check its mileage history even more closely.
• Run the VIN and check the mileage history before you travel to see the car.

How to check a car's mileage history by VIN

Almost everything in this article comes down to readings you can't see on the dashboard. They sit in service, inspection and insurance records, and the VIN ties them together.

You'll find the VIN at the base of the windscreen on the driver's side, on the sticker in the driver's door frame, and on the registration document. A MrVIN check shows you:

• Every recorded mileage reading, with its date and the country it was logged in.
• Any reading lower than the one before it, marked in red like the charts above.
• Damage and insurance claim records.
• Where the car has been registered before.

The number you can check

An odometer is just a display. What matters is the record behind it, and that record doesn't change when the number on the dashboard does.

A clean mileage history means no drop was recorded. A car with only a few readings can still hide a change between them, so no check can promise a perfect odometer. What it can do is show you every reading that exists.

Not sure yet? See what a full report looks like first