Are Electric Cars More Reliable Than Petrol? What the Breakdown Data Shows

"Aren't electric cars unreliable?" is one of the most common worries from used-car buyers eyeing their first EV. The fear is understandable — EVs are new, full of technology, and the battery is a big unknown. But for once this isn't a question you have to answer with vibes. There's now enough real-world data to look at, and the headline finding surprises a lot of people: electric cars break down less often than comparable combustion cars — not more.

Here's what the data actually shows, why, and the caveats that keep it honest.

What the breakdown data says

ADAC — Europe's largest automobile club — runs the continent's biggest breakdown dataset, logging millions of roadside call-outs every year and publishing breakdown rates per 1,000 registered vehicles (the Pannenkennziffer). Because EVs have now been on the road long enough, the 2025 report could compare electric and combustion cars of the same age directly.

The result: among comparable-age cars, combustion cars averaged roughly 9.4 breakdowns per 1,000 vehicles, versus about 3.8 for electric cars — and for the two-to-four-year-old bracket, petrol/diesel cars had on the order of ~150% more breakdowns than same-age EVs.

That's not a small edge. On the raw call-out data, the average EV is markedly less likely to leave you stranded than an equivalent combustion car.

It shows up in the model rankings too. Across the reliability data we aggregate at AutoFindr — including that ADAC breakdown data — the most reliable models are increasingly electric: cars like the BMW i3, Cupra Born, Audi Q4 e-tron, Tesla Model Y, and VW ID.3/ID.4 sit at the very top of the breakdown rankings, ahead of most combustion models.

Why EVs break down less

It's mostly mechanical simplicity:

• Far fewer moving parts. An electric motor has roughly a handful of moving components versus hundreds in a combustion engine plus its gearbox. No timing belt, no turbo, no clutch, no exhaust system, no fuel injection, no multi-speed transmission — that's a long list of common failure points simply deleted.
• Less heat and vibration. Combustion engines run hot and shake; EV drivetrains don't, so things wear more slowly.
• Regenerative braking means the friction brakes do far less work, so pads and discs last much longer.
• No oil, spark plugs, cambelts, or exhaust to service or fail.

Fewer parts that can break means fewer breakdowns. The data is really just confirming the engineering.

The twist: the most common EV breakdown isn't the battery

Here's the detail almost nobody expects. In the breakdown data, the single biggest cause of breakdowns — for both EVs and combustion cars — is the humble 12-volt starter battery, not the high-voltage drive battery.

Yes, EVs still have an ordinary 12-volt battery (it powers the computers, lights, and electronics), and it's responsible for around half of all EV breakdowns. The big traction battery that everyone worries about rarely causes a roadside call-out. So the thing people fear most about EVs is not what actually strands them — a flat 12V battery is, and that's a cheap, ordinary fix common to every car.

The honest caveats

Data this good still deserves caveats, and ADAC itself is careful here:

• EVs are still young. The fleet is newer on average than combustion cars, and breakdown data over the full life of today's EVs simply doesn't exist yet — it's still, in ADAC's own words, too early for a final verdict.
• "Breakdown rate" isn't the same as "repair cost." EVs break down less, but when something major does go wrong — a high-voltage component, or eventually the battery — the repair can be expensive. Reliability (how often it fails) and cost-of-failure (how much when it does) are different things.
• The battery is a depreciating consumable. It degrades slowly over years; that's covered by long manufacturer warranties (typically 8 years / 160,000 km), but it's the one EV-specific thing to check on a used example.

None of these undo the headline — EVs break down less — but they're why "more reliable" should mean "fewer breakdowns," not "zero things to check."

What this means if you're buying a used EV

The reliability data is genuinely reassuring: a used electric car is less likely to strand you than an equivalent petrol car. But "reliable" still means doing the EV-specific homework:

• Check the battery's State of Health (SoH) and how much of the warranty remains — this is the one thing unique to EVs.
• The usual due diligence still applies — see what to check when buying a used electric car and the beginner's guide to electric cars.
• Remember the running-cost side too — EV maintenance costs are where a lot of the savings actually show up (no oil, brakes last longer).

Before you commit to a specific EV, run it through the AutoFindr analyzer — make, model, year, mileage — for its composite reliability score (drawing on the same TÜV / ADAC / MOT / NHTSA data behind this article), known issues, and a fair-price band. The breakdown numbers say EVs are a safer bet than their reputation suggests; the analyzer tells you whether this one is.

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