2015 A8L Power Steering Control Module failure

[gt30r18t]

Hey all. New to owning an A8 so new to posting in this sub group.

I have a 2015 A8L 3.0L TDI. Recently my PSM failed. Long story short, got in, started driving, received message stating malfunction do not drive. Code was DTC B2000 49 - Control Module Faulty, Steering stopped working and had to be muscled at any speed. Removed PSM, sent to UpFix. They stated it was communicating but could not take new programming, then they shipped it back.

1) has anyone else experienced this?
2) has anyone discreetly installed and programmed a new PSM?
3) do I need to be concerned about the model of PSM Im putting in?
4) is there any way to avoid the Audi recommended repair of replacing the entire steering rack?

I looked through the forum but couldn’t find anything on my first pass.

Thanks in advance.

[gt30r18t]

K, so short update. Seems some are interested as per the views, so I’ll continue to update. Decided to pull the trigger to buy a used rack. It’s sourced from a 2015 A8L 4.0L. So should be direct swap. Will let you know how it goes. Looking at the location, it should be pretty easy to swap out. There is a training to be performed by turning the steering wheel from lock to lock. Otherwise should be straight forward. Let me know if anyone would like more details or if you’d like me to document the process.

The root cause of the failure was water intrusion into the PSM. I plan to use silicon grease on the main seal of the PSM and di-electric grease on the connections to prevent this from happening again on the replacement unit.