BMW TSB #B170120
2020 BMW X7
Affected Component: ENGINE AND ENGINE COOLING
- 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. AFFECTED VEHICLES Vehicles which require this Service Action to be completed will show it as "Open" when checked either in AIR the "Service Menu" of DCSnet (Dealer Communication System) or with ISPA NEXT.