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Re: Mazda used ECM replacing process by j2534
Posted to Technical Discussion Forum on 12/1/2013 3 Replies

I have only replaced one Mazda PCM and I had to reprogram the keys by accessing the PATS. I had to enter Incode / Outcode. Got the outcode from [...]. I did not use a J2534 box to do this.

This link probably answers your question best.

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