Replace all the ignition coils
BMW technical service bulletin B121320 for 2019-2021 BMW X5, 2016-2019 BMW 750LI and 2019-2021 BMW X7 and others.
- Bulletin number
- B121320
- Component
- Engine
- Summary
- REPLACE ALL THE IGNITION COILS: The ignition coils may not have been produced to specifications which could lead to irregular running of the engine.
Owners of these vehicles have filed 193 complaints in the engine category.
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