The 2008 Toyota Corolla Matrix has 4 recalls, all centered on the front passenger airbag inflator, with the most serious risk being the inflator rupturing in a crash and sending metal fragments into the cabin.
Three of the recalls address the same core defect: the passenger-side frontal airbag inflator can explode rather than inflate normally, turning the inflator housing into a source of metal shrapnel that can strike occupants. Prior repair attempts did not fully resolve this issue for all affected vehicles, which is why multiple recall campaigns exist for what is essentially the same hazard. The fourth recall applies specifically to vehicles that already had the front passenger airbag assembly replaced under an earlier recall: the replacement bag may not unfold correctly during inflation in high-temperature conditions, leaving the occupant without proper cushioning in a crash.