Suzuki Jimny Engine Problems

Because of the long time that has passed since the crash it will be very hard to connect the problems you are having to the prang. Crank angle sensors often fail on all makes and models, I wouldn't attribute that to the crash, and the head and head gasket problems you have had are unlikely to be related either. The second instance of head cracking and the head gasket failure are more likely to be the result of poor repairs to the head when it first cracked.