The easiest number to fake on a used car is the one you trust most
Ten thousand kilometres wound off a dashboard is worth several hundred euros to whoever did it.
Mileage is the single number that sets a used car's price, and it is also the easiest thing on the entire car to change. A laptop, a cable into the diagnostic socket and a few quiet minutes in a car park will take fifty thousand kilometres off a modern instrument cluster without leaving a scratch. Research cited by the European Parliament puts manipulation at between five and twelve percent of used cars sold inside their own country, and at between thirty and fifty percent of those sold across a border. With more than sixty million second-hand cars changing hands in the EU every year, the estimated damage runs to somewhere between 5.6 and 9.6 billion euros annually. Almost none of that has to land on you, because in most of Europe the real readings are written down somewhere. You just have to ask for them before you fall in love with the car.
Digital odometers made clocking easier, not harder
The old mechanical drums had to be physically taken apart and usually left evidence behind: misaligned digits, scratched dials, a dashboard that had clearly been out. A digital odometer is a number in a memory chip. The tools that rewrite it are sold openly online as correction devices, cost less than a set of tyres and need no more skill than plugging in a cable. Worse, the act itself is a criminal offence in only a handful of member states. Everywhere else it sits in civil law, where you are the one who has to prove it happened. Which means your defence is never the dashboard. It is the trail of readings other people wrote down.
Belgium, and the system the rest of Europe is copying
Belgium's Car-Pass is the model everyone points at. Every visit to an approved professional, whether for servicing, a repair, a tyre change or the periodic roadworthiness test, sends the reading to a central database, and those successive records form the car's mileage history. It covers passenger cars and light commercial vehicles up to 3.5 tonnes that have been registered in Belgium. When a professional seller sells to a private buyer, handing over a valid Car-Pass is a legal obligation, and it has to be recent: in practice less than two months old, precisely so it cannot predate a manipulation. A dealer who cannot produce one is either selling a car that was never Belgian, or should not be selling it to you at all.
The Netherlands, France, Germany and everywhere else
The Dutch equivalent is the national mileage register behind the RDW, which has been collecting readings from virtually every registered car since 1991. You check it yourself, free, with nothing more than the registration number and the mileage currently showing on the dashboard, and it tells you whether that reading is logical against everything recorded before it. France runs HistoVec, a free government portal covering ownership changes, recorded damage, inspection results and mileage, with one catch: the seller generates the report and shares it with you. A private seller who will not send a HistoVec link has told you something useful anyway. Germany has no central register at all, but the mileage has been a compulsory entry on every roadworthiness inspection report since 2010, so a complete run of those reports is a mileage register in paper form. That last point generalises: EU roadworthiness rules mean the reading is recorded at every periodic test in every member state, so even where no database exists, the inspection certificates are a timeline.
The gap that catches imports
Here is the part that costs people real money. A national register only knows the years the car spent in that country. Six years in Germany followed by six months in Belgium produces a Car-Pass with six months of history on it, and it will look immaculate, because it is. It simply has nothing to say about the period when the kilometres actually disappeared. That blind spot is exactly where the thirty to fifty percent cross-border figure lives. So look at the registration document first and find out where the car has lived, then ask for the previous country's paperwork: the German inspection reports, the French registration certificate and HistoVec link, the Italian inspection stamps. If the seller shrugs about everything before the import, treat the mileage as unknown rather than as stated.
What the car itself tells you
Walk around it before you drive it. Service stickers in the door jamb or under the bonnet often carry the reading at the last oil change, and they are frequently forgotten by whoever rewrote the cluster. The tyres deserve a minute of their own: the four digit code moulded into the sidewall gives the week and year they were made, and an eight year old set on a car claiming forty thousand kilometres is possible but worth a question, while the pressures they are sitting at tell you how attentively the car has been looked after. Kerbed alloys and scuffed sidewalls say something about the life it has had. Then look at the parts a driver touches ten thousand times a year: the pedal rubbers, the shine on the steering wheel rim, the outer bolster of the driver's seat, the gear knob, the wear on the key. None of these prove anything on their own. Together, a car that has supposedly done sixty thousand kilometres but wears like one that has done two hundred thousand is telling you the truth while the dashboard lies.
The check almost nobody pays for, and should
A modern car does not store its mileage in one place. The figure is written into several control units, among them the engine management, the gearbox, the ABS and the airbag module, and on many brands into the key itself. Someone rewriting an odometer normally does the instrument cluster and stops there, because doing the rest takes time, equipment and a reason to bother. A workshop diagnostic session reads all of them and lays the numbers side by side. A cluster showing eighty thousand while the gearbox module remembers two hundred and ten thousand is not something a seller can explain away. This costs less than an hour of labour at any independent garage, and it is comfortably the best value in the entire purchase.
Read the service history as a graph, not a stack
Every stamp, invoice and inspection report carries two things: a date and a reading. Write them out in order on the back of an envelope. A genuine car climbs steadily, usually somewhere between ten and twenty-five thousand kilometres a year, with the rate changing when the car changed hands or changed job. What you are hunting for is not the total, it is the hole. Two or three years with no entries at all, or a stretch where the annual distance suddenly collapses to nothing, is the interesting part. The kilometres did not stop during those years. Only the record did.
What is coming, and why you should not wait for it
In December 2025, EU transport ministers agreed on a scheme modelled directly on Car-Pass for the whole Union: readings pushed into a central database at inspections and workshop visits, manufacturers reporting mileage from connected cars every three months from first registration, and manipulation made a criminal offence in every member state. It is a genuinely good piece of law and it will make the cross-border blind spot much smaller. It also still needs the European Parliament before the text is final, and then transposition and implementation after that. Which is to say it will help enormously with the car you buy at the end of the decade, and not at all with the one you are going to look at on Saturday.
If it turns out to have been clocked
Buy from a professional seller anywhere in the EU and you have a legal guarantee of at least two years, under which a mileage that is not what the advert promised is a straightforward non-conformity rather than an argument about opinion. That makes the paperwork worth keeping: screenshot the listing, keep the invoice, and get any mileage claim in writing, because the advert is what turns a vague suspicion into a documented misdescription. A private sale gives you far less protection, which is worth remembering when the private price looks like a saving. And if the car you are checking does not survive the scan, walk away from it rather than negotiating on it. There is always another one, and plenty to compare it against on AutoNext.
What to actually do
Six steps, and the first one happens before you get in your own car to go and see it.
Ask for the national mileage record before you travel. A Car-Pass in Belgium, a free plate check on the RDW site in the Netherlands, a HistoVec link in France, the full run of inspection reports in Germany and most other countries. A seller who stalls has already answered the question.
Find out where the car has lived, from the registration document. If it was imported, the national record starts at the import date and everything before that needs paperwork from the previous country.
Lay the service history out by date and reading, and look for the gap rather than the total.
Walk the car before you drive it: service stickers, tyre date codes, pedal rubbers, steering wheel, seat bolster, key wear. Ask yourself whether the wear and the number belong to the same car.
Pay a garage for a diagnostic scan that reads the mileage out of every control unit, not just the cluster. Under an hour of labour, and the single cheapest piece of certainty in the whole purchase.
Keep the advert, the invoice and every written mileage claim. From a professional seller in the EU, a false reading falls under the two year legal guarantee, but only if you can show what you were promised.
Frequently asked questions
Is the lowest mileage in the listings the best car?
No, and this is worth internalising before you start looking. Genuinely low mileage on an older car usually means short journeys and long periods standing still, which is hard on batteries, brake discs, rubber and exhaust systems. A ten year old car with a hundred and fifty thousand motorway kilometres is often in better health than the same car with sixty thousand town ones. An unusually low number for the age is a thing to verify, not a reason to hurry.
The dealer's Car-Pass is a few months old. Does that matter?
Yes. The document has to be recent, in practice less than two months, and the reason is precisely that an older one cannot reflect anything that happened since. Ask for a fresh copy. It costs the seller almost nothing and a refusal is informative in itself.
Can I check a foreign number plate myself?
Usually not directly. Most national registers are built for their own domestic market, and some, HistoVec among them, require the seller to release the report. That is why the seller's willingness to produce documents matters as much as the documents. Commercial history reports based on the VIN can fill some of the gap, but treat them as a supplement to the official record rather than a replacement for it.
Does any of this matter on an electric car?
It matters differently. Mileage still drives the asking price, but the number that really decides what a used EV is worth is the battery's state of health, which a diagnostic readout will give you and which no dashboard displays honestly on its own. Ask for that alongside the mileage, and ask how the car was charged, because a life of rapid charging leaves a mark that a rewritten odometer does not hide. The way an EV wears its tyres is another clue worth reading.
The seller has no service history at all.
Then you are buying the car without the history, and you should pay accordingly. No stamps, no invoices and no inspection reports does not prove the mileage is wrong, it means the mileage is unverifiable, and unverifiable is a discount rather than a leap of faith. Get the diagnostic scan done regardless, since the control units keep their own records whether or not anyone kept the paperwork.
