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HiCustomer welcome to Just Answer. I'm acuramstr. That is the controll unit for the SRS airbag system the PCM (ECU) is behind the glove box heres a picture
if im getting codes for the ecu like air mixture and gear ratio will it prevent the car from shifting properly. i got a new ecu for it and im hoping that it fixes the issue. starts fine and goes into reverse but when you put into drive ..... nothing. anyway just thought that i would ask i appreciate your help.