BMW 550I 2008–2012 — technical service bulletin
Bulletin B121015 · NHTSA communication 10152303 · issued Apr 1, 2015
Technical service bulletin
communication type
Engine
component
2008–2012
model years
13
vehicle entries
Official summary
N63: CBS Oil Service Conversion in ISTA/P. The CBS oil service conversion performed for the N63 Customer Car Package and timing chain check (SI B11 16 14) does not work correctly for the above models with the current version of ISTA/P. After the conversion, the forecast interval does not change to the desired 10,000 miles/12 months, or the forecast is displayed as an invalid value, for example: 25,000 miles/24 months. 1. Incorrect DME coding or calibration data, which is being investigated. 2. The ISTA CBS correction test plan contains an error when attempting to correct an invalid oil service
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.