Why More Than 4 Million UK Cars Now Have Over 100,000 Miles on the Clock

More than four million cars currently registered in the UK have accumulated over 100,000 miles on the clock, according to DVSA MOT data obtained through a Freedom of Information request by eBay. The figure, which has risen significantly over recent years, reflects a broader shift toward keeping vehicles for longer as the cost of motoring continues to pressure household budgets. With 45.7 per cent of UK cars now more than ten years old, a record high, the era of the high-mileage car is well and truly underway.

The data, analysed and published by the RAC, provides an unusually detailed picture of the UK’s ageing car parc. It reveals not just the headline four-million figure, but the full distribution of vehicles with very high mileage, including hundreds of thousands with more than 200,000 miles and several thousand that have clocked well beyond 400,000 miles. For drivers wondering how long a modern car can realistically last, the evidence is increasingly encouraging.

The Full Picture: How Many High-Mileage Cars Are on UK Roads?

The DVSA MOT records analysed in the FOI request break down the high-mileage car population in considerable detail. The largest group consists of 4,363,123 cars with between 100,000 and 149,999 miles on the clock. Beyond that, 1.2 million cars have reached 150,000 to 199,999 miles, and 286,630 have accumulated between 200,000 and 249,999 miles.

Further along the spectrum, more than 111,000 cars are registered with between 250,000 and 399,999 miles. At the very top of the range, 5,646 cars have between 400,000 and 499,999 miles, and 2,699 have passed the 500,000-mile mark entirely. These figures represent not just well-maintained classics or specialist vehicles but ordinary cars that have been kept running through attentive servicing and, in many cases, significant investment in repairs over time.

The data also reveals a notable trend among electric and hybrid vehicles. More than 93,000 electrified cars have surpassed 100,000 miles, with 32,000 having passed 200,000 miles. This challenges the common concern that EV and hybrid battery systems will degrade significantly before reaching meaningful mileage milestones, and suggests that many examples are covering substantial distances with their powertrains still functioning.

Nick Mullender, Lead Mobile Mechanic at the RAC, noted that modern cars are better built than their predecessors and, provided they are serviced regularly and not neglected, can realistically be expected to reach very high mileage. The key variables are maintenance history, driving style, and whether minor faults are addressed promptly before they become major problems.

Why UK Drivers Are Holding On to Cars for Longer

The record proportion of UK cars over ten years old, now at 45.7 per cent compared with 43.4 per cent in previous years, is not accidental. It reflects a convergence of economic pressures that have made new and nearly-new car ownership less accessible for a large segment of drivers. New car prices have risen considerably in recent years, driven by the cost of new technologies, supply chain disruptions, and the higher baseline price of electric vehicles. At the same time, the used car market experienced a period of significant price inflation that has only partially unwound.

A survey of 2,000 UK drivers by OnePoll found that drivers consider 96,000 miles to be the threshold at which they would consider a car to be high mileage. This perception is somewhat below the statistical reality, given that many cars continue to perform reliably well beyond that figure. The mismatch between perception and actual vehicle longevity may mean that cars approaching or passing 100,000 miles are being discounted in the used market more aggressively than their actual condition warrants, potentially creating opportunities for buyers who look past the odometer reading.

Average car ownership duration across the UK has risen to 6.1 years, but this figure masks significant variation by age group. Drivers aged 18 to 24 tend to own a car for an average of 4.5 years, while those aged 65 and over keep their vehicles for nearly seven years on average. Older drivers, who typically drive lower annual mileages, are more likely to own a car that ages in years faster than it accumulates miles, whereas younger drivers with higher annual mileage may reach the 100,000-mile mark in their vehicle relatively quickly.

The long-term trend toward keeping cars for longer also has implications for the MOT testing regime. As the average age and mileage of the UK car parc rises, the volume of vehicles presenting at MOT stations with wear-related issues on tyres, brakes, suspension, and emissions systems is likely to increase. Garages and test stations have a growing customer base of high-mileage vehicles needing careful assessment rather than routine sign-off.

What to Look For When Buying a High-Mileage Car

A high mileage figure on the clock is not automatically a reason to reject a vehicle, but it does warrant careful scrutiny. The most important single document for any high-mileage used car is its full service history, ideally stamped by franchised or specialist garages at the intervals specified by the manufacturer. Evidence of timing belt or chain replacements, coolant flushes, and transmission fluid changes at appropriate intervals is reassuring.

The MOT history for a car can be checked for free through the DVSA’s online service, which shows every MOT result and advisory note going back to 2005. A car with a long string of advisories that have never been addressed, or with recurring failures for the same component, should prompt questions about how it has been maintained. Conversely, a clean MOT history with few advisories over many years is a positive indicator.

An independent pre-purchase inspection by a qualified mechanic is money well spent on any vehicle over 100,000 miles. Services such as the RAC’s vehicle inspection can identify issues that are not apparent from a visual check or test drive, including structural corrosion, oil leaks, worn suspension components, and signs of previous accident repair. The cost of an inspection is typically under £200, which is modest compared with the potential cost of an undisclosed mechanical problem.

Keeping a High-Mileage Car Running Reliably

Maintenance becomes more important, not less, as a vehicle accumulates miles. The components most likely to need attention on a high-mileage car include the cooling system, which is prone to small leaks as hoses age and the radiator corrodes; the suspension, where bushes, springs, and dampers wear over time; and the brake system, including callipers that can seize on older cars that have been used mainly for short journeys.

Fluid condition is a reliable indicator of maintenance standards. Transmission fluid on an automatic gearbox should be clear or light in colour; dark, burnt-smelling fluid suggests the box has been run without changes for too long. Engine oil should be changed at or before manufacturer-specified intervals, and on high-mileage engines, moving to a slightly higher viscosity oil can help maintain oil pressure as tolerances in the engine widen with wear.

The RAC’s Nick Mullender advises that drivers of high-mileage cars pay particular attention to tyre condition, not just tread depth but also the age of the tyre as indicated by the sidewall code. Tyres more than six years old can develop internal structural deterioration even if the tread depth looks adequate, and on a high-mileage car that may have had its tyres infrequently rotated, uneven wear can become a hidden safety issue.

With over four million UK cars beyond 100,000 miles and more than 45 per cent of the entire car parc over a decade old, high-mileage motoring is no longer a niche activity but the mainstream reality for a large proportion of UK drivers. Understanding what to look for and how to maintain an ageing vehicle effectively is increasingly relevant knowledge for anyone on UK roads.

Sources

RAC: More than 4 million cars have over 100,000 miles on the clock (May 8, 2026)

DVSA MOT history checker (gov.uk)