I think the ETK I-series is a bit buggy

when I crash the ETK very hard into a wall or something random happens like the time I drove the ETK onto the bumpy road on gridmap V2 and a tire popped the ETK wont drive anymore even if I reset it

 

Any mods installed?

 

Yes, Hay Bale Sport, Me262, Formula MuYe, HardCrash Explosive Barrel, Hirochi Prasu, lamborghini-gallardo-improved, FR17 and 1989 Ibishu Pescoupe but I dont think a mod would effect only the etk since I tested the others

 

Deactivate them and clear cache, a lot of modded vehicles now such as the fr17 break if you pop the tires and it no longer works like your etk.