N63: cbs
BMW technical service bulletin B121015 for 2011 BMW X5, 2009-2010 BMW 750LI and 2011 BMW 550I and others.
- Bulletin number
- B121015
- Component
- Engine
- 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 prognosis value.
Owners of these vehicles have filed 210 complaints in the engine category.
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