Technical Service Bulletin B170617 — 2018 BMW 750I
FUEL SYSTEM, GASOLINE
Bulletin Details
| TSB ID | B170617 |
| Manufacturer | |
| Vehicle | 2018 BMW 750I |
| Component | FUEL SYSTEM, GASOLINE |
| Communication Date |
Bulletin Summary
COOLANT LEAK FROM LOW TEMPERATURE COOLING CIRCUIT (N63R): This Service Information Bulletin (Revision 5) replaces SI B17 06 17 dated June 2019. Traces of coolant leaking from the expansion tank of the low temperature cooling system. Coolant in the low temperature cooling circuit may also have an acrid smell and discoloration (1). Aluminum corrosion in the charge air intercoolers or in the radiator for the low temperature cooling is causing an unfavorable chemical reaction to the coolant.
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.
Other TSBs for the 2018 BMW 750I
SIB 62 03 21
ENGINE AND ENGINE COOLING
B620120
ELECTRICAL SYSTEM:SOFTWARE
B512119
ELECTRICAL SYSTEM
B663119
POWER TRAIN:MANUAL TRANSMISSION:SHIFT PATTERN INDICATOR