I had coworkers that had all electric EVs (both had nissan leafs) 5 years ago and they both said it was like 7 dollars a month as a daily 60 mile per day commuter.

Aside from Teslas (which are afaik impossible to repair) the estimate is that due to fewer moving parts the lifetime maintenance costs are 2/3 the cost of gas vehicles AND the vehicles are expected to last longer in general (no giant gas engine that needs to be rebuilt every 200,000 miles)

This is one place where like gas car companies see this and keep trying to kick the can down the road