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SIB 17 06 17: Coolant expansion tank leak

Coolant expansion tank leak on BMW G05/G06/G07/G11 and other models (2016–2023); BMW explains the cause and the approved repair.

BMW service bulletin · NHTSA ID 10230724 · Dec 2022 · also written SI B17 06 17, B170617

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 leaking from the engine compartment. Traces of coolant leaking from the expansion tank of the low temperature cooling system.

NHTSA's summary of this communication (excerpt)

Official document on NHTSA (PDF) →

Details

Bulletin numberSIB 17 06 17
Also written: SI B17 06 17, B170617, 17 06 17, SIB-17-06-17, SI B170617
NHTSA ID10154823, 10163034, 10166228, 10174007, 10178994, 10230724 (revisions)
Document IDs filedB170617
TypeService bulletin
Date (first filed Feb 2018)
Models530e, 530i, 540d, 540i, 740e, 740i, 740LI, 745e, 750i, 750LI, ALPINA XB7, B7 ALPINA, M550i, M760i, M760LI, X5, X6, X7
Model years2016–2023
ChassisG05, G06, G07, G11, G12, G30, G31
EnginesB46/B48, B57, B58, N63, N74
Component (NHTSA)Engine
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.

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