BMW fault code D851
Head-Up Display
In the head-up display, code D851 means different things depending on the version of the module in the car. Find your car below; the app shows the right one for yours.
Long and/or frequent unlocks (Error_Unlock_Long).
Module version: Head-Up Display (HUD_60)
In: 5 Series (E60) 2003–2010, 5 Series (E61) 2004–2010, 6 Series (E63) 2003–2010, 6 Series (E64) 2004–2010
MOST Error_Unlock_Long
Module version: Head-Up Display (HUD_70)
In: X5 (E70) 2006–2013, X6 (E71) 2008–2014, X6 (E72) 2009–2011
Reading and clearing it
Fault code D851 is a BMW code, stored in the car's head-up display, 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 head-up display is on: 5 Series (E60), 5 Series (E61), 6 Series (E63), 6 Series (E64), X5 (E70), X6 (E71), X6 (E72)
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