BMW fault code 0004
On-board monitor, wideshield
In the on-board monitor, wideshield, code 0004 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.
Short circuit audio line 1
Module version: On-board monitor, wideshield (BM46WIDE)
In: 3 Series (E46) 1998–2006, X5 (E53) 1999–2006, Z8 (E52) 2000–2003
Short circuit low-frequency line 1 (MD L-)
Module version: On-board monitor, wideshield (BM_WIDE)
Which BMWs have this version depends on the engine and equipment, so we don't list them here; AutoLingo for BMW reads which version your car has.
NAR: Short circuit, LF line 1
Module version: Navigation radio (BMBT46RN)
In: 3 Series (E46) 1998–2006, X5 (E53) 1999–2006, Z8 (E52) 2000–2003
BM: Short circuit, LF line 1
Module version: On-board monitor, Top navigation (BMBT46TN)
In: 3 Series (E46) 1998–2006, Z8 (E52) 2000–2003
MIR: Short circuit, LF line 1
Module version: Multi-Information Radio (BMBT_MIR)
Which BMWs have this version depends on the engine and equipment, so we don't list them here; AutoLingo for BMW reads which version your car has.
PL line open circuit
Module version: On-board monitor (BORDMONI)
In: 5 Series (E39) 1995–2003, 7 Series (E38) 1994–2001
Reading and clearing it
Fault code 0004 is a BMW code, stored in the car's on-board monitor, wideshield, 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 on-board monitor, wideshield is on: 7 Series (E38), 5 Series (E39), 3 Series (E46), Z8 (E52), X5 (E53), X3 (E83), Z4 (E85), Z4 (E86)
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