Ignition Sys - Iridium Spark Plug Info/Application Chart SI B12 01 05 Engine Electrical System

Technical Service Bulletin # 120105 Date: 101201
Ignition Sys - Iridium Spark Plug Info/Application Chart
SI B12 01 05
Engine Electrical System
December 2010
Technical Service
This Service Information bulletin supersedes SI B12 01 05 dated April 2010.
[NEW] designates changes to this revision
SUBJECT
High Performance Iridium Spark Plug/Spark Plug Application Chart
MODEL
E90, E91, E92, E93, E60, E61 with N51, N52, N52K engine
2010 BMW 328i Sedan (E90) L6-3.0L (N51)   38
SITUATION
High Performance Iridium Spark Plugs, also referred to as High Power Iridium Spark Plugs, were introduced staring with the 2006 model year and
later in E90 and E60 vehicles with the N52 engine.
High Performance Iridium Spark Plugs incorporate an iridium center electrode (0.6 mm thick), one ground electrode, and a redesigned insulator.
The new spark plug technology allows for increased service life, improved cold start performance/combustion characteristics, and a consistent
operation throughout the entire service life.
The service life of the new High Performance Iridium Spark Plug is 100,000 miles.
PROCEDURE
The High Performance Iridium Spark Plug tightening torque of 31Nm +/- 2Nm (23 +/- 1.5 ft.lb.) remains the same as the specification used on other
standard BMW engines.
[NEW] The attached updated Spark Plug Application Chart includes the spark plug manufacturer, plug designation, tightening torque, and special
tools to be used when removing and installing spark plugs on all BMW engines. Applications for the new direct injection engine types (N52T, N54,
N55, N63, S63, and N74) have been included. For the spark plug part number, refer to the current version of the ETK Parts Catalog.
Notes:
^ On N52/N52KP engines, only High Performance Iridium Spark Plugs are to be used when the replacement is required. A mix of different spark
plug manufacturers, i.e., Bosch/NGK, should never be installed in one engine.
^ Spark plugs must always be torqued to the proper specifications, as outlined on the attached chart.
PARTS INFORMATION
Refer to ETK
WARRANTY INFORMATION
For information only
ATTACHMENT
2010 BMW 328i Sedan (E90) L6-3.0L (N51)   39
2010 BMW 328i Sedan (E90) L6-3.0L (N51)   40
2010 BMW 328i Sedan (E90) L6-3.0L (N51)   41
SPARK PLUG APPLICATION CHART