BMW 528I 2011–2012 — technical service bulletin
Bulletin 123414 · NHTSA communication 10148169 · issued Dec 1, 2014
Technical service bulletin
communication type
Electrical System
component
2011–2012
model years
3
vehicle entries
Official summary
N52T DME Fault CD9304: Diagnostic Hints for Bit-Serial Data Interface Communication. If there is a problem with communication on the Bit-serial data interface bus (BSD), the obvious symptoms are related to the oil service CBS functions. The DME must receive constant communication from the oil level sensor. Whenever this communication is disturbed, a fault is set and the following symptoms can be present: ? The remaining distance forecast to the next oil service is too short and not plausible in conjunction with the service history. ? The CBS engine oil service cannot be reset either in the Kom
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.