Post by brkica on Sept 11, 2024 19:13:39 GMT
I recently tried to adapt a BCM from a FL 2024 into a 2021 Golf 8. I got a preety nasty suprise that dataset upload to only some memory addresses (i my case for AMBI lights) failed. Reason is that VW requires SFD2 release tokens to unlock writing to these specific addresses. It is impossible to have SFD2 released for a part that is not factory fitted to the car (or if the new part is not an approved part number change). Reason is that the SFD2 token is actually a 2-part key - the tokens (and checksums) on the specific unit(s) must match the exact copy stored on VW servers....
So, although I have a proper dataset, dealership level diagnostic access to ODIS and a valid SWaP, I am unable to retrofit the new BCM in the car. Everything except AMBI lights works though. It is interesting that only writing to specific addresses was locked... As AMBI has nothing to do with safety, I assume SFD2 was introduced to further lock down retrofit of features VW makes a lot of money of. So please beware, SFD2 might ruin your day. I am currently unsure what units (except the 09) are partially or fully protected by SFD2...
In my case, only option to have the part retrofitted is to find a car that has the unit from factory, then hook my BCM to that car and perform software adaptation using SVM (on that car). The adapted unit then can be returned to my car.
So, although I have a proper dataset, dealership level diagnostic access to ODIS and a valid SWaP, I am unable to retrofit the new BCM in the car. Everything except AMBI lights works though. It is interesting that only writing to specific addresses was locked... As AMBI has nothing to do with safety, I assume SFD2 was introduced to further lock down retrofit of features VW makes a lot of money of. So please beware, SFD2 might ruin your day. I am currently unsure what units (except the 09) are partially or fully protected by SFD2...
In my case, only option to have the part retrofitted is to find a car that has the unit from factory, then hook my BCM to that car and perform software adaptation using SVM (on that car). The adapted unit then can be returned to my car.