BMW fault code 52D1
Transfer case
VTG: Incremental transducer in servomotor, supply
Module versions: Transfer box (VGSG70), Transfer box (VGSG83), Transfer box (VGSG90)
In: 3 Series (E90) 2005–2012, 3 Series (E91) 2005–2012, 3 Series (E92) 2006–2013, 5 Series (E60) 2003–2010, 5 Series (E61) 2004–2010, X1 (E84) 2009–2015, X3 (E83) 2003–2010, X5 (E53) 2003–2006, X5 (E70) 2006–2013, X6 (E71) 2008–2014, X6 (E72) 2009–2011
Reading and clearing it
Fault code 52D1 is a BMW code, stored in the car's transfer case, 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 transfer case is on: X5 (E53), 5 Series (E60), 5 Series (E61), X5 (E70), X6 (E71), X6 (E72), X3 (E83), X1 (E84), 3 Series (E90), 3 Series (E91), 3 Series (E92)
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