i have a '04 g35c 18" oec wheels mich. pilots, with 15k miles. last night i got a flat on my rear driver's side (245/45-18). what is the warranty on the tires? the side wall has a slit like hole. thanks

 

There is no warranty for road hazards - unless you purchased one from whatever vendor you purchased the tire from.

And because the damage is a slit and on the sidewall, it's unrepairable.

Sounds like you got your tire slashed by a knife.