Door won’t lock? Replacing your door latch assembly is a common repair for issues with intermittent alarm problems & door locking and in my case, installing a new 8J1837016B was the solution.

My Audi A4 B8 door wouldn’t lock, either by using the master door key, any other fob, or switches inside the car. The alarm system also would not arm. Once the ECU was scanned via Ross-Tech VCDS, I found an instance of P02115 - Locking Unit for Central Locking fault logged as well.

Thank you to ‪@fcpeuro‬ for quality parts at reasonable prices and quick shipping to Canada.

Chapters:
00:00 - Symptoms of problem
02:57 - Latch removal DIY
08:05 - New actuator install

This part fits the following vehicles and has a very similar installation process on either the front or rear doors. Be sure to check your exact make, model and year for fitment!

2.0 and 3.2L A4 B8
2.0 and 3.2L A5 B8
4.2l S5 B8
2.0 and 3.2L 09-10 Q5
2.0 and 3.2L mk2 TT+TTS
2011-2014 VW Touareg