[Monkey Wrench]

looks like the undamaged circuit board has flameproof resistors in place of the regular ones that appear burned in the first set of board pics.

Maybe it means there was a revision or a repair on the second board? If the factory saw those two parts failing, they may have increased the watt value of the resistors to make them more reliable ?

something important here. did you alter any wiring or make any mistakes like hooking up jumper cables backwards or any unusual electrically related event that preceded the failure? short some wire by accident? "stuff" happens ! If there is an electrical problem a quick way to mess up is to replace the board before you correct the issue that caused it to blow.

sometimes boards like that have a label or a revision number. I saw there was a paper label on the microchip, perhaps with a date or rev number? if they change the way the logic works there could be other revisions of the chips. Maybe the label there indicated the rev number of the microchip.

appears they are soldered in, Ive worked on machines where a factory would send out revisions in the form of an eprom which a chip that looks similar, then we'd just have to pop out the old one and replace it and that's how they upgraded the machine to have new functionality. I think those shown are soldered in.

if you find a date code you can compare that to the year of your car and see if it is perhaps any newer.

if you have more money than time then Just replace, if you are short on cash the actual electronics parts are cheap and there is no guarantee, but if you try and fail you probably aren't much further back.. maybe you get lucky.