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SIB 12 25 14: Spark plugs rough running

Spark plugs rough running on BMW E60/F01/F02/F06 and other models (2009–2015); BMW explains the cause and the approved repair.

BMW service bulletin · NHTSA ID 10148022 · Sep 2014 · also written SI B12 25 14, B122514

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.

N63T: Improvements to Bosch Spark Plug. Various engine performance symptoms could occur if the spark plug insulator becomes damaged: * The Service Engine Soon (MIL) may be on with rough running and misfire fault(s) stored.

NHTSA's summary of this communication (excerpt)

Official document on NHTSA (PDF) →

Details

Bulletin numberSIB 12 25 14
Also written: SI B12 25 14, B122514, 12 25 14, SIB-12-25-14, SI B122514
NHTSA ID10148022
Document IDs filed122514
TypeService bulletin
Date
Models550i, 550I Gran Turismo, 650i, 750i, 750LI, X5
Model years2009–2015
ChassisE60, F01, F02, F06, F07, F10, F12, F13, F15
EnginesN63
Component (NHTSA)Electrical System

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.