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NHTSA 10150124: Condensation builds up inside the taillight lens

Condensation builds up inside the taillight lens on BMW E89 models (2009–2013); BMW explains the cause and the approved repair.

BMW service bulletin · NHTSA ID 10150124 · Mar 2013

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.

Condensation builds up inside the taillight lens.

NHTSA's summary of this communication (excerpt)

Official document on NHTSA (PDF) →

Details

Bulletin numberNHTSA 10150124
NHTSA ID10150124
Document IDs filed631410
TypeService bulletin
Date
ModelsZ4
Model years2009–2013
ChassisE89
EnginesN20, N52, N54
Component (NHTSA)Exterior Lighting › Tail Lights

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.