There are numerous parts that can malfunction or deteriorate in both EV's and ICE vehicles. An EV has a drive unit with a set of gears that are lubricated/cooled with oils. Some have heat pumps to aid with heating, and the battery's temperature has to be monitored and maintained within a certain temperature range. There are numerous temperature and pressure sensors throughout the vehicle. The battery temperature sensors come into play whenever the battery's temperature approaches the low or the high limits, even when the EV is parked and not pugged to an electrical outlet.
ICE vehicles, just like EVs have numerous temperature and pressure sensors thought the vehicle, and just like EVs they also have traction/stability controls, TPM, ABS and other sensors. The EV has electric motors, while the ICE vehicle has an internal combustion motor (engine). Compare an EV battery to the fuel tank of an ICE vehicle, and the EV motor (s) to an internal combustion engine.
The average vehicle's warranty in the US for an ICE vehicle is 3 years or 36,000 miles for the powertrain, and longer for seatbelts and a few other things. The warranty for an EV's battery seems to be around 8-years, and it is possible that like ICE vehicles, some of the safety devises or systems have longer warranties.
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The last new vehicle I purchased was in 2009, a Subaru Forester. The idea was for me to give to my wife as a present, but she didn't like driving it because the seats made her back ache. In 2011 I traded it for a used, but still under warranty Toyota RV4 V6, and she is still driving it nearly 75,000 miles later. We haven't had any mechanical problems with this automobile, nor with the 2012 Corolla that I bought "used" in 2014.
I also have a 2001 Silverado truck that I purchased around 6-7 years ago when the odometer reached 184,000 miles, and today it shows a little under 215,000 miles. I have been using this truck when I go camping, hunting, when taking photos of the auroras during the winter nights, or when photographing wildlife during the summer (I drive long distances and spend numerous hours on these summer trips). I had a mechanic replace the water pump, and a power steering hose for a cost of under $600.00, and I replaced the alternator myself, not because it needed replacing, but because it was the original alternator. I have never had to replace the motor of any of the vehicles I have driven for the past 50 years. Well I did replace part of the motor of a 1981 F-150 truck several years ago. The motor was OK, but it "threw" (whoever that means) one of the pushrods, and NAPA had what on sale what is called, "a short block" for a little over $500.00. A friend and I replaced the motor, and I gave the truck to a coworker of mine about seven years ago.