If a car is all wheel drive and one tire goes flat do you need to replace the other tires, too?
It depends on the vehicle . Subaru - Yes . On yours you should measure the tread and I would at least put 2 new ones on the rear. But if they are close to being replaced with all the buy 3 get one free sales I would do that. I assume you meant tire unrepairable rather then just going flat.
Thanks! Definitely unrepairable.