A recent study analyzing 47.4 million MOT tests has found that high-mileage electric vehicles (EVs) tend to be more reliable than petrol cars of a similar age and mileage. The research, conducted by consultancy New AutoMotive on behalf of the British Vehicle Rental and Leasing Association (BVRLA), indicates that after reaching 90,000 to 120,000 miles, electric cars were approximately 25% less likely to fail MOT tests compared to petrol vehicles, with failure rates of 16.5% for EVs and 22.1% for petrol cars. Beyond 120,000 miles, the failure rates were 16% for electric cars and 23.5% for petrol counterparts. At lower mileage levels, the study observed minimal differences between the two types of vehicles.
The findings come amid an increasing number of used EVs entering the secondhand market, many of which have accumulated high mileages during their previous use in company and leasing fleets. Toby Poston, CEO of the BVRLA, emphasized that mileage is a significant consideration for buyers and that crossing thresholds like 60,000 or 70,000 miles often affects perceptions about a vehicle’s condition. However, Poston noted that the data suggests mileage alone should not deter consumers from purchasing used EVs, highlighting that a well-maintained electric car with high mileage can remain durable and reliable.
Ben Nelmes, CEO of New AutoMotive, pointed to the mechanical simplicity of electric drivetrains as a key factor in their longevity. He said that, contrary to traditional assumptions, high mileage does not necessarily correlate with poor condition in the case of EVs, as the fewer moving parts in electric vehicles contribute to sustained reliability over time.
The study also identified certain areas where EVs underperformed relative to petrol cars. Notably, electric vehicles had nearly twice as many tyre-related defects. Additionally, older EVs with lower mileage exhibited a higher incidence of friction-brake defects, which researchers attributed to corrosion resulting from brakes being used less frequently due to regenerative braking systems.
It is important to note that while MOT tests assess statutory roadworthiness components such as brakes, tyres, suspension, steering, and lights, they do not evaluate battery health, degradation, or charging capability—factors that are critical to overall EV performance. The researchers advise prospective buyers to consider battery condition alongside mechanical roadworthiness when assessing used electric vehicles.
Poston advised that buyers exercise the same level of due diligence for EVs as they would for petrol or diesel cars, including examining service histories, mechanical condition, and battery health. The study challenges the notion that electric cars with substantial mileage are inherently worn out, suggesting instead that a robust used EV market could play a vital role in making electric transportation more accessible and affordable.