Service action - add silicone booster to low temp cooling system
BMW technical service bulletin B170120 for 2019-2020 BMW X5, 2019-2020 BMW X7 and 2020 BMW X6.
- Bulletin number
- B170120
- Component
- Engine and engine cooling
- Summary
- SERVICE ACTION - ADD SILICONE BOOSTER TO LOW TEMP COOLING SYSTEM: The coolant in the low temperature cooling system may not have sufficient coolant corrosion protection.
Owners of these vehicles have filed 146 complaints in the engine category.
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