Hello again. I bought a mechanical key (non transponder) cut to match my electronic key in hopes of entering the car in case I locked myself out of the vehicle again. The key fits in the lock cylinder and turns and I can hear the lock actuator moving inside the door but...the door will not unlock. The car is a 2007 Mazdaspeed3. Is there a factory installed feature preventing me from entering the car without a diode key in the lock cylinder? Can it be disabled or overidden? Thank you, rpmstar. BTW... Just think about all those Fords out there with Mazda Ecoboost engines. You can get an Ecoboost engine in almost any Ford car and the F150 too!...but you can't get get the Mazda turbo in many Mazda models.