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SIB 12 21 13: Radiator service information

Radiator service information on N20/N52 engines (2012–2014); BMW gives diagnosis and repair guidance.

BMW service bulletin · NHTSA ID 10150164 · Nov 2013 · also written SI B12 21 13, B122113

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.

Service Action: Program Control Units (Direct Ozone Reduction).

NHTSA's summary of this communication (excerpt)

Official document on NHTSA (PDF) →

Details

Bulletin numberSIB 12 21 13
Also written: SI B12 21 13, B122113, 12 21 13, SIB-12-21-13, SI B122113
NHTSA ID10150164
Document IDs filed122113
TypeService bulletin
Date
Models328i, 428i
Model years2012–2014
ChassisE92, E93, F30, F31, F32, F33, F34, F36
EnginesN20, N52
Component (NHTSA)Engine And Engine Cooling › Exhaust System › Emission Control › Catalytic Convertor

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.