A new study of millions of vehicles across Great Britain has revealed that electric vehicles (EVs) are much less likely to fail compared to petrol equivalents as the car’s mileage climbs.
The study, which was commissioned by the British Vehicle Rental and Leasing Association (BVRLA) and carried out by independent transport research organisation New AutoMotive, aims to correct misconceptions around the long-term reliability of EVs.
The study analysed 47.4 million statutory Ministry of Transport tests completed across Great Britain between July 2024 and July 2026, and found that battery electric vehicles (BEVs) and petrol cars perform at near parity for the first 40,000 miles.
But as that mileage increases, BEVs consistently outperform petrol vehicles, demonstrating much greater reliability.
Official MOT tests are mandated by the UK Driver and Vehicle Standards Agency (DVSA) and are an annual legal safety and environmental vehicle inspection required for most vehicles over three years old in the UK.
By analysing this massive test database, the study was able to pierce misconceptions on both side of the debate.
Over the first 40,000 miles driven, BEVs and petrol cars exhibit a failure rate at near parity – around 12 per cent for BEVs and 11.7 per cent for petrol cars – but when the mileage starts to climb past 60,000 miles, the BEV failure rate levels off at approximately 16 per cent while petrol and diesel failure rates climb “relentlessly” past 23 per cent.
The discrepancy between BEVs and petrol cars only widens as the mileage increases.
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