BMW fault code A77D

Active backrest width, front passenger

No message from the front passenger seat module, receiver active backrest width, front passenger, transmitter front passenger seat module

Module version: Active backrest width, front passenger (ALBV60B)

In: 5 Series (E60) 2003–2010, 5 Series (E61) 2004–2010

Reading and clearing it

Fault code A77D is a BMW code, stored in the car's active backrest width, front passenger, not a generic OBD2 code (P0xxx): a generic OBD2 reader only reaches the engine's emissions faults, so it won't show it. AutoLingo for BMW reads it with BMW's own diagnostic protocols, in plain English, with the details the module stored about it, and clears it after a repair. If a fault comes right back after it's cleared, the problem is still there.

The active backrest width, front passenger is on: 5 Series (E60), 5 Series (E61), 6 Series (E63), 6 Series (E64)

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