[WretchedRefuse]

Originally Posted by Jambo1

Having done this retrofit a while ago, and with everything working perfectly, it still bugs me to have this fault code:

Code: D90D70: Switch Block, Seat Function Driver’s Door (LIN): Wrong Variant Installed.

Is there a way to integrate this Gentlemen's Switch into the car so it becomes a correct variant?

Calling out all the ISTA+/ESYS gurus...

I've never seen that, nor have I ever seen any kind of fault warning from the car since installing mine. Does it only appear on a scan tool?

[Jambo1]

Originally Posted by WretchedRefuse

I've never seen that, nor have I ever seen any kind of fault warning from the car since installing mine. Does it only appear on a scan tool?

Correct, only appears on scan tool. Dash is free of any faults.

[ashmostro]

I've ordered this part and as a member of the OCD community, I'm going to attempt removing the trim panel piece off the new part and my old part, tracing out the cutout for the new button on my old switch trim panel, and then Dremeling it out hopefully as straight as possible. I will lose the little LED that lights up when the gentleman switch button is activated, but that's a small price to pay for a proper fit.

Will keep you updated on the project.

[ezaircon4jc]

Originally Posted by ashmostro

I've ordered this part and as a member of the OCD community, I'm going to attempt removing the trim panel piece off the new part and my old part, tracing out the cutout for the new button on my old switch trim panel, and then Dremeling it out hopefully as straight as possible. I will lose the little LED that lights up when the gentleman switch button is activated, but that's a small price to pay for a proper fit.

Will keep you updated on the project.

What's your interior color? Honestly, at the angle you would view the switch, you don't even notice the size difference.

[ashmostro]

Ivory

[Eco89909192]

I just tried it today, 2021 540i, as describes around here, coded with Bimmercode and everything, and to my surprize, it doesn't work. Neither the mirrors and the windows controls from the driver's side. I tried putting back the old seat switches, restored the backups with bimmer code, and the same. Had this happened to anyone else?

Did a scan with bimmerlink and I got this errors:

4 errors

1. 8044D7: Interior light layering FI-LIN-1: Number of layering slaves incorrect
2. D90D07: Control unit door switch center (SZT) (LIN): Missing LIN slave
3. D90D0A: Left exterior mirror (LIN): Missing LIN slave
4. D90D71: Switch block seat extensions FA: Missing LIN slave

Is it something that can be solved easily or a visit to the dealer should be planned?

[ezaircon4jc]

Originally Posted by Eco89909192

I just tried it today, 2021 540i, as describes around here, coded with Bimmercode and everything, and to my surprize, it doesn't work. Neither the mirrors and the windows controls from the driver's side. I tried putting back the old seat switches, restored the backups with bimmer code, and the same. Had this happened to anyone else?

Did a scan with bimmerlink and I got this errors:

4 errors

1. 8044D7: Interior light layering FI-LIN-1: Number of layering slaves incorrect
2. D90D07: Control unit door switch center (SZT) (LIN): Missing LIN slave
3. D90D0A: Left exterior mirror (LIN): Missing LIN slave
4. D90D71: Switch block seat extensions FA: Missing LIN slave

Is it something that can be solved easily or a visit to the dealer should be planned?

The gentlemen switch only controls the seat functions.