Longer than ICE vehicles.

There’s comparatively so few moving parts that they can last a long, long time. 99% of vehicles that are junked for anything other than accidents it’s because something expensive in the engine or transmission blew up. EV motors have ONE moving part, and most EV gearboxes (nearly all of them in fact) only have a very sturdy, single, fixed gear instead of a complicated and relatively fragile transmission.

The only part that wears out in the drivetrain is the battery. And the life on those is surpassing our expectations. The average 2012 model year Tesla model S still had 90% of its battery capacity in 2019. There have been posts from people with 300k+ miles and batteries above 90%.

The rest of the vehicle should last the same as an ICE car.

And once battery packs aren’t good enough for automotive use they still have useful life as stationary energy storage systems where energy density doesn’t matter nearly as much.