autotopsy
The procedure performed by the M.E. (mechanical examiner) to assertain the reason your vehicle died.
Person 1: Wow! What happened to your car? It was working fine yesterday.
Person 2: I'm not sure, they are performing an autotopsy on it.
Person 2: I'm not sure, they are performing an autotopsy on it.
autotopsy
in the modern setting the scavenging of abandoned vehicles
autosy-autotopsy seems clear enough on its own