BMW fault code 93C3
Crash safety module
In the crash safety module, code 93C3 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.
ACSM: Seat occupancy detector, passenger
Module versions: Crash safety module (ACSM2), Crash safety module (ACSM85)
In: 1 Series (E82) 2007–2013, 1 Series (E88) 2008–2013, 3 Series (E92) 2006–2013, 3 Series (E93) 2007–2013, X1 (E84) 2009–2015, X5 (E70) 2006–2013, X6 (E71) 2008–2014, X6 (E72) 2009–2011, Z4 (E85) 2006–2008, Z4 (E86) 2006–2008
MRS: Seat occupancy detector, passenger
Module versions: Multiple restraint system (MRS5), Multiple restraint system (MRS7)
In: 1 Series (E87) 2004–2011, 1 Series (E81) 2007–2011, 1 Series (E82) 2007–2013, 3 Series (E90) 2005–2012, 3 Series (E91) 2005–2012, 3 Series (E92) 2006–2013, X1 (E84) 2009–2015, Z4 (E89) 2009–2016
SIM: Self-test: data error in message
Module versions: Safety and Information Module (SIM), Safety and Information Module (SIM85)
In: 7 Series (E65) 2001–2008, 7 Series (E66) 2002–2008, 7 Series (E67) 2002–2008, Z4 (E85) 2002–2008, Z4 (E86) 2006–2008
No message (0x43) from engine control, SIM receiver, DME-DDE transmitter
Module version: Safety and information module (SIM) (SGM_60_2)
In: 5 Series (E60) 2003–2010, 5 Series (E61) 2004–2010, 6 Series (E63) 2003–2010, 6 Series (E64) 2004–2010, 7 Series (E65) 2001–2008, 7 Series (E67) 2002–2008, 7 Series (E66) 2002–2008
Reading and clearing it
Fault code 93C3 is a BMW code, stored in the car's crash safety module, 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 crash safety module is on: 5 Series (E60), 5 Series (E61), 6 Series (E63), 6 Series (E64), 7 Series (E65), 7 Series (E66), 7 Series (E67), X5 (E70), X6 (E71), X6 (E72), 1 Series (E81), 1 Series (E82), X1 (E84), Z4 (E85), Z4 (E86), 1 Series (E87), 1 Series (E88), Z4 (E89), 3 Series (E90), 3 Series (E91), 3 Series (E92), 3 Series (E93)
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