The belt pulley on the mechanical coolant pump may fracture allowing the engine drive belt to come off...
BMW technical service bulletin B110521 for 2021 BMW X5, 2021 BMW 330I and 2021 BMW 530I and others.
- Bulletin number
- B110521 (0011160600)
- Component
- Engine
- Summary
- The belt pulley on the mechanical coolant pump may fracture allowing the engine drive belt to come off thecoolant pump and alternator.
Owners of these vehicles have filed 58 complaints in the engine category.
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