Buying a car with over 100,000 miles

There is a persistent belief that 100,000 miles is where a car becomes a liability. It is a hangover from the 1980s, when it was true.

On a modern car it is mostly wrong — and acting on it means paying a premium for a number rather than for a car. Here is what actually matters once the odometer goes past six figures.

Why the number matters less than it used to

A well-maintained modern engine will do 200,000 miles. What kills cars at 150,000 is rarely the engine: it is corrosion, a failed automatic gearbox, an expensive electrical fault, or simply that the repair bill exceeded what the car was worth.

Which means the useful question is not "how many miles" but "what will go next, and what will it cost".

Motorway miles versus town miles

Two cars at 120,000 miles can be in completely different condition.

A car that did those miles on motorways has had long runs at steady temperature, gentle brake use and a diesel particulate filter that regenerated properly. A car that did them in traffic has done maybe eight times as many cold starts, far more clutch and brake cycles, and — on a diesel — probably has a partly blocked DPF.

You can tell them apart from the MOT history. Consistent 15,000-mile years suggest a commuter. Erratic 5,000-mile years suggest local use.

What actually costs money after 100,000

Timing belt. Usually due somewhere between 60,000 and 100,000 miles, or by time. Around £400–£700, and if it snaps on an interference engine the car is finished. Ask when it was last done and get evidence. This is the single most important question on any high-mileage car.

Clutch and dual-mass flywheel. £600–£1,200 on many cars. Judder on pull-away and rattle at idle are the warnings.

Automatic gearbox. The expensive one — often £1,500 and up, sometimes more than the car is worth. Test every gear from cold and from warm.

Suspension. Bushes, drop links, wishbones and shock absorbers all wear out and are consumables rather than faults. Individually cheap; together they add up.

Turbo. £500–£1,200. Blue smoke and whistling are the signs.

Corrosion. On a car of this age this is the real killer, because it is the thing that ends cars rather than costing money to fix. Look at the sills, the arches, the door bottoms and the subframes. This is why we underseal every car we sell.

What actually matters more than mileage

Service history. A 130,000-mile car with a folder of invoices is a better bet than an 80,000-mile car with nothing. The folder tells you someone cared.

Number of owners. Fewer usually means better, but not always — one owner who ignored it is worse than three who did not.

How it drives from cold. Most faults show up in the first two minutes. Insist on starting it cold; a seller who has warmed the car up before you arrive may be being helpful, or may not.

The MOT history. As above — it is the record nobody can edit.

The sweet spot

Somewhere around 90,000 to 130,000 miles is where the market over-corrects. The price has fallen a long way because of the number, but on a well-kept car the expensive scheduled work — belt, clutch, suspension — has often already been done by the previous owner, at their expense.

That is the car to look for: high miles, thick folder, recent big-ticket items already paid for by someone else.

What we do

We buy in this bracket deliberately, because it is where the value is. Every car gets serviced, gets at least six months MOT, gets its safety items measured and gets undersealed. What needed doing gets done; what did not need touching, we leave alone.

And we publish the full MOT history and what is not perfect about the car, so you can judge the mileage in context rather than in isolation.