1:12 pm, July 7, 2026
Battery failures are one of the biggest fears that put off potential used EV buyers, but new data shows this isn’t one of the most common warranty claims.
Data from Warrantywise shows that the most common problems with electric vehicles are don’t relate to the high-voltage battery systems but instead the conventional car components.
It analysed warranty claims made by its customers between January 2023 and January 2026.
Electrical system problems with the most common in the top five problems, with sensors coming top of the list.
Central locking systems were the second most common failure and problems with the auxiliary battery were fifth.
The only EV-specific component to make the list was the on-board charger, which was third, and fourth on the list were suspension problems from wishbone failures.
Top five most common used EV repair requests
- Sensors (Electrical system) – £809.59 average repair request cost (£3,270 highest)
- Central locking mechanism (Electrical system) – £899.44 average repair request cost (£4,056.82 highest)
- On-board charger (EV) – £2,158.75 average repair request cost (£10,454.98 highest)
- Wishbones (Suspension) – £1,229.64 average repair request cost (£4,118.65 highest)
- Auxiliary battery (12V battery, Electrical system) – £532.94 average repair request cost (£986.15 highest)
Although electrical system problems with sensors sound simple, the cost of repairing was still high.
The average repair cost for this was £809.59 but the most expensive repair was £3,270.
The onboard charger was the most expensive repair, with the average costing £2,158.75 but the highest was £10,454.
Antony Diggins, managing director at Warrantywise, said: ‘For many used EV buyers, the battery is still the biggest perceived concern, but our repair request data shows a more balanced picture.
‘The most regular repair requests we see are linked to familiar used-car components, from sensors and central locking to suspension and aux batteries, rather than the EV battery itself.
‘That is an important message for dealers. It gives sales teams a clearer way to discuss used EV ownership with customers, helping to reduce misconceptions without downplaying the fact that repair costs can still be significant.’
Warrantywise also reported a 68.2% increase in EV warranty sales between 2024 and 2025, which it said reflected growing demand for protection as the used electric car market expands.
