Immobilizer Compatability from year to year

[particlewave]

I'd have to look over the wiring diagram again to be sure of any differences, but the primary difference is frequency.

Edit: a quick glance in the Bentley manual shows quite a few differences between the M531, M534, M535 and M536. Not sure what issues may arise, but I'd take Woody's word for it.

I spent a good hour looking through the workshop manuals, but didn't find anything. It's probably around 2000 pages long, though.

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[itsnotanova]

I've done it once or twice to get a car running. I've also sold a couple to people who had to use a mismatch set on their boxster. I think all you lose is the ability to use your key fob but the car runs fine. There's no permanent damage to anything but the wire harness connection on the car. Even that's not a big deal as it still will plug into a 535 if you happen to go back.

[itsnotanova]

A little advice. If you have the original key for the car there's no need to switch out the locks. Just transfer the transponder inside the good key into your old key. Way easier than changing the door and ignition locks. In fact, I recommend taping the transponder to the back of the ignition cover. Then you can get duplicate keys made for cheap