Quote:
Originally Posted by rick-l
Are you sure your car requires that? Subaru's you're supposed to replace all four but they have a viscous coupling in the center and rear.
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Any modern car can be affected by one new tire vs three old. With wheel speed sensors for ABS, traction control, and stability/roll mitigation a relatively slow reading at one tire could throw things off. In the case of AWD, it could cause the transfer case to send power toward the new tire, thinking another was turning faster aka slipping.
But with a Subaru, Audi, or other mechanical center diff (or car/truck with mechanical limited slip or locking diff) it could harm something.
It drives me absolutely nuts when people replace just one or two tires. Replace all four. Unless you had nearly new tires and had a blow out, and only then if you replaced it with an exact match. One of my personal OCD issues, I guess.