I have a Pontiac Vibe with an ecu issue. I am having a hard time finding the correct one. I called gm dealership they said they are on back order. I know some of the matrix and vibe ecu will interchange. They also updated the part numbers which is making this really confusing. Mine is an 89661-02L70. When you look this up on Toyota page it shows it completely different. Any way of knowing what is correct?