Well you have the Audi 2.0T with the damaged piston rings, BMW motor N47 damaged distribution chain, VW and the DSG dry oil crankcase, Renault and the disastrous electronic problems with their 2.2 diesel… This is just a short example of disastrous models that were a nightmare for their owners.

That kinda study sounds like it’s ripe for some serious variability. Idk if you’d ever see a study like that unless the automakers themselves released it.

Ahh, but the fires! My second cousin knows a guy who’s girlfriend has a sister who saw an EV catch fire.

/sarcasm

The rate of Lemon law returns is public abs know. Toyota is all time king 1 lemon 🍋 per 2029 cars sold. Tesla is at 1:1553. GM 1:78 cars. lemon index

https://www.truedelta.com/car-reliability has car reliability ratings, though not specifically about engine failures. Good luck

The problem is similar. Engines can have a bad seal, a crankshaft not right. These get replaced.

Batteries as a hole don’t just fail. A cell goes bad. We don’t have easy methods to replace the one.

Important distinctions from new that might make the comparison less relevant.

ICE cars typically have relatively short warranty periods after which repairs are all on your dime.

EVs more typically have 8 year 100k+ mile warranties on battery and drivetrain so battery failures at cost haven’t been very prevalent yet. At the same time, the battery reconditioning business hasn’t really needed to expand because most cars haven’t timed out of battery warranties.

Other important distinction is that the ICE engine reliability is at steady state more or less. EV battery technology has already drastically evolved over the last 5 or 10 year period and should be trending even more reliable every year.

ADAC statistic (2023) for how often cars need roadside assistance (in german, but you can probably make out what the various graphics/tables mean or run it through google translate)

https://www.adac.de/rund-ums-fahrzeug/unfall-schaden-panne/adac-pannenstatistik/

Key numbers:

Cars with need for roadside assistance (per 1000):

ICE: 6.9 total (of which: 2.5 due to 12V battery; 1.6 tires; 0.5 starter/lights/ignition; 0.6 keys/locks: 1.3 motor/motor management/high voltage system…and then various positions at 0.1 each for chassis, drive related systems, brakes and ‘other’)

EV: 4.9 total (of which: 2.5 due to 12V battery; 1.1 tires; 0.6 starter/lights/ignition; 0.2 keys/locks: 0.2 motor/motor management/high voltage system…and then various positions at 0.1 for chassis, other drive systems, brakes and 0 for ‘other’)

​

(I highlighted the block “motor/motor management/High voltage system” whicc is probably what you’re intersted in. Effectively ICEs break down 6-7 times as often due to issues in that area)

So we’re comparing an engine in one vehicle to the “fuel tank” in another…

I bought an EV, and I have to hear questions, jokes etc at first. THey died down as all of those people have car repair issues, or engine failures (new truck), etc.

Then I’m bombarded with commericals on tv for car repair. Ads in the mail for fluid changes, etc.

It’s so clear and blunt that it’s like asking for stats to show that the summer is hotter than the winter.

Complete engine failure is quite uncommon. The question is about complete battery failure, I hope would be the same uncommon, but no actual stats or observations

Here is a dependability study in the US

https://www.jdpower.com/business/press-releases/2023-us-vehicle-dependability-studyvds

Doesn’t really answer your cute question, but it’s still info.

It depends on the brand. A Toyota engine lasts longer than a Tesla battery without major repairs, but not necessarily longer than a BMW or VW battery.