>> But a microchip is just a tad more complex than a combustion engine,
>> too.
>
> Not any more it's not. ;-)

Especially given that most engines have needed several microchips even 
to start for at least a decade or two.

> I used to service my own cars and bikes. Other than check the fluids all
> I can do with the engine nowadays is check that it is still there. :-)

All cars have a diagnostic port, there is pretty cheap equipment you can 
buy to attach to this and do lots of useful things. I was able to 
diagnose a faulty fuel pressure sensor, replace it and reset the fault 
codes. It cost me almost nothing, whereas the garage wanted it for 3 
days to diagnose (surely $$$).

Engines have got a lot more complicated, but now we have the internet so 
unless you have a *really* exotic car, there is always going to be 
someone somewhere who has done/fixed what you want and documented it.

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