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SIB 17 03 16: Coolant expansion tank leak
Coolant expansion tank leak on N63 engines (2016); BMW gives an inspection and repair procedure.
BMW service bulletin · NHTSA ID 10146885 · Oct 2016 · also written SI B17 03 16, B170316
What it covers
A service bulletin tells BMW technicians how to diagnose or fix a known issue. It is not a recall: a repair under a bulletin is normally paid by the owner unless the car is still under warranty or a warranty extension applies.
COOLANT LEVEL LOW"": LEAKING EXPANSION TANK. Check Control Message (CCM): ""Coolant Level Low"" Hissing noise from the coolant expansion tank with engine at operating temperature Evidence of coolant coming out of expansion tank"
Details
| Bulletin number | SIB 17 03 16 Also written: SI B17 03 16, B170316, 17 03 16, SIB-17-03-16, SI B170316 |
|---|---|
| NHTSA ID | 10146818, 10146885 (revisions) |
| Document IDs filed | B170316 |
| Type | Service bulletin |
| Date | (first filed Sep 2016) |
| Models | 750LI |
| Model years | 2016 |
| Chassis | G11, G12 |
| Engines | N63 |
| Component (NHTSA) | Engine And Engine Cooling Fuel System Gasoline |
Model, year and engine coverage comes from NHTSA's records. Not every car in this range is affected; the official document lists the exact production dates and conditions.
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Source: NHTSA Manufacturer Communications (public data). BimmerBench is not affiliated with BMW or NHTSA. The title and description above are our own plain-English summary; the full bulletin is BMW's document, linked above.