It could be a bad NSS but it may be that the NSS is out of adjustment from the engine and transmission assembly moving forward slightly in the accident. Check your shift lever position carefully to see if the lever truly lines up with the detents in the shift gate---my guess is that it is off just a bit (not fully in Park with the lever pushed all the way forward). It is possible that merely adjusting the shift linkage will get the NSS operating properly. Mark