Hello folks, well the x5 is alive again, the timing chain was almost a link longer than the new ones. Perhaps there was longer chains in early n62 engines because the guides was replaced with a new type. Made it without removing cylinderheads but I had to cut the guide bolt on bank 1 about 4mm to get them in there.

The old guides fell apart just looking at them so I was really lucky, I did get 2 fault codes though on one coil and zk10 battery ignition switch (srs). The coil was an easy fix the rubber on it was broken so the spark flew all over the cyl head. But the zk10 code is anoying don´t think I could have broke the explosive charge on the battery terminal... Only removed negative terminal.

Any suggestions on that zk10 fault code except from 2ohm resistor?