Comment by pengaru

> Of course, now days the wiring harnesses themselves have become huge and unwieldy in many vehicles - literal miles of cables!

Engine harnesses are not that bad in my experience, especially not for a small 4-cyl. Chassis harnesses, with all the bells and whistles they keep piling into smartphones on wheels, agreed. But we're talking about engines here.

> Things like motor controllers/inverters tend to be very reliable so there is rarely any need to disassemble or service them during the lifetime of the vehicle. If they do fail there's a ready supply of affordable replacement parts, thanks to salvage from crashed vehicles, so it's often easier to just replace a faulty part than attempt to service.

I figured as much. This is basically already the case with all the various modules littering the chassis in modern ICE vehicles. We don't service the power steering or engine control modules; it either works or you replace it, usually with some cheap used replacement from a wrecker. Unless the car's been flooded, the miles and age don't seem to be a problem except the occasional cold solder joint.

Many more of my hours have been wasted fussing with jets and floats on old carburetors than any control modules on these newfangled computerized vehicles.