Does high mileage mean a worse MOT pass rate? The workhorses say no

Pass rate drops as mileage climbs, until it does not. Cars averaging over 130,000 miles buck the trend, driven by hybrids, vans and taxis built for distance.

MOT DATA · 5 min read

A second cut of the same dataset

Our age-band piece found pass rate does not fall in a straight line as cars get older. Mileage is the more direct signal a buyer actually checks at auction, so we ran the same weighted method against it: every model with at least 500 tests, grouped by average mileage into five bands, each band's pass rate weighted by test volume.

The five mileage bands

Under 40,000 miles: 89.9 percent (1,046 models, 2.7 million tests). 40,000 to 69,999: 78.1 percent (439 models, 11.4 million tests). 70,000 to 99,999: 74.1 percent (297 models, 13.6 million tests). 100,000 to 129,999: 72.0 percent (180 models, 4.3 million tests), the low point. 130,000 miles or more: 74.4 percent (43 models, 484,708 tests), a real tick back up.

Who is actually in the highest-mileage band

The 43 models averaging over 130,000 miles are not random old bangers, they are vehicles built or run for distance. The Toyota Prius leads the group at 86 percent across 157,929 tests, averaging 132,186 miles, a hybrid drivetrain doing what it is designed to do. The London Taxis International TX4 averages 217,321 miles at 75.1 percent, a vehicle engineered from the start for a taxi duty cycle. Mercedes Vito and Sprinter vans, BMW 5 Series and Volvo V70/V50 estates fill out most of the rest, big diesels built for continuous work and long motorway miles.

The low point is the ordinary family car at the end of its life

The 100,000 to 129,999 mile band, the actual low point at 72.0 percent, is where an ordinary small-to-mid car lands once it has covered a normal decade of use without being a workhorse. That is the band a typical private-owner salvage lot in this mileage range is most likely to fall into, and it is worth budgeting for MOT-time wear items accordingly rather than assuming distance alone explains a failure.

What this means for a salvage buyer

Do not read a high odometer number on its own as a red flag. Check what the vehicle actually is: a hybrid, van, taxi-spec model or big diesel estate built for distance can still test well past 130,000 miles, while an ordinary hatchback in the 100,000 to 130,000 range is statistically the weakest spot in the whole dataset. The model matters more than the number on the clock.

Check the specific car, not just the band

These are fleet averages across whole models, not a prediction for the one lot in front of you. Look up the model's own pass rate on our MOT data pages, pull the specific reg's real MOT and mileage history free with our Vehicle History checker, then run the lot through the Analyzer for the repair and fee numbers before you bid.

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