One tip is to get used parts from a place like LKQ. They take most parts back, but always worth checking.

At least two of those problems seem to link to the fault that makes the X think the door is locked. Since you have a new actuator and door harness, it is probably farther upstream or something like an open ground. Needs troubleshooting.... I'm sure it is a PITA.

What software are you using? Can you test the various modules with it?

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David.X5
2001 X5 4.4i Sport
SOLD! at 160k miles