Slashed or Defect?!?! :(

Hmmm I had Toyo ATs on my Tacoma too. I had shredded lugs on my back tires but never had a split on my sidewall like that- Like everyone else said, take it back to your local tire shop and see what they say.

Toyo has some sort of warranty on their tires.. Cant remember what the numbers were though

 

Clearly, someone slashed your tire. For sure. That's a very clean, straight cut. A defect would have pulled and left a more serated edge.

 

Pretty sure sidewall damage usually is never covered under road hazard.

 

Looks to me that you ran over something metal, glass.