your idea is nice but if we add it so players not kill in car and its not interesting and its like car health hacks and In YG its not allowed

but you can fix your vehicle by /vr and you can use /autofix and your car auto fix so its like ur idea but by this dont kill players its on /rules

for more vehicle commands click on it:
www.rbtdms.smffy.com/index.php?topic=1307.0