And an engine is perfectly viable without ANY electrics never mind electronics, had one like that on a boat.
Compressed air bottles to start, then mechanical injection pump with a rack operated by a mechanical governor, did just fine.
Basically the politicos could fix the problem for the car industry by simply telling the relevant department to dust off the construction and use regulations from say 1975 and make them current...
Yea, fuel efficiency would suck, and London (and LA) would wind up looking a little hazy (Oh and airbags would probably not be a thing), but you can build vehicles that way.
Come to think of it, even an airbag is possible, mass and buckling spring as a sensor, a metal azide fired by the buckling spring, then shock tube up to the charge, probably be more reliable then some of the modern ones to boot.