[Zeroheight]

Hey bro,

Thank you for this great write up as I’m planning on doing this retro soon. One request, I have tried to click on the photo links but they didn’t work. Could you please up the photo links?

~Z

Originally Posted by JKK74

I just finalize my heated steering wheel retrofit for my G31. Finally I got it work

What you need:

- Steering wheel with heating button including "electronic steering wheel module", which is little box inside steering wheel (see TIS: ControlUnit A69). This little box controls heating and (optional) vibration function.

- New steering column switch cluster (TIS: ControlUnit A83) (Suitable part numbers: 61317944073 or 61317944074) which have heating power pins on connector "A83_4B".
If your switch cluster is "61317944072" from factory, it wont work with heating....
Check this picture and part number table (part number 1).

I picked my second hand steering switch cluster from eBay with 60€.
Note: In case of G30/G31 switch cluster is not any kind of control unit. It`s only BCM slave... some kind of "routing matrix" without brain... Very easy to swap with new one.

- Behind steering wheel/switch cluster wiring is 100% "retrofit ready". Already from factory. But important note! There is one missing fuse+missing wire behind fuse box (TIS: Fuse Box "Z44")

If steering wheel heating option 248 is fitted from factory, there is Red/Grey- coloured power-wire between Fusebox (from Fuse 57) to connector "X434*1B_pin_1".

But without heating option this wireline above is non-wired. This is propably main reason for problems for all who had tried to get this retrofit working... I think so. For me it took couple of hours to find this damned missing line / X424*1B -connector before get this working. So you have to wire that missing line behind fuse box from F57 to "X434*1B" (pin1) and then your steering wheel electronic module (TIS: A69) will be powered!

For some nice reason power wire from "X434*1B" to steering switch cluster is pre-wired from factory (Wire is Green/Blue-coloured). Which is nice of course.

Here is few needed pictures. I hope this will help somebody.
G30/G31 Steering wheel heating retrofit pictures

And after all.... then coding. Update option 248 to VO and recode BCM, HU-UNIT and KOMBI.

btw. If you are installing shift paddle version of steering wheel, remember to route one missing shift paddle signal cable from steering column cluster to BCM. Otherwise shift paddles wont work after coding. Check this picture