How To Change Coil Pack On Bmw E46

Ignition coil technology dates back to around 1918, when automobiles were first equipped with batteries and higher engine pinch dictated the demand for a stronger spark. A single ringlet would provide the spark power for the entire engine (or sometimes 2 coils for larger "V" engines). The canister-style ignition coil remained in regular product use correct upward to the 1990s.

In the early 1990s BMW switched from the canister-mode ignition whorl with spark plug wires to a "coil on plug" straight ignition system. This placed a coil on each private cylinder. The spark phase is a lot more than efficient and the sophisticated electronics have much more command over ignition. This was amend overall for operation, fuel efficiency, emissions, and diagnostics.

However, placing coils inside the cylinder head seems to have its drawbacks. Misfires, hard starting, rough engine running, poor fuel economy, and loss of performance take plagued BMWs for years. In a large majority of cases, these symptoms are traced back to the ignition coils. BMW has fabricated many changes and revisions over the years in efforts to ameliorate quality and prevent these issues. However, it's not always a design flaw or poor manufacturing. There are a lot of outside factors that tin can contribute to ignition curl failure on BMWs - vibration, heat, oil contagion, electric faults, and others.

This page is mainly well-nigh the 2003-2016 pencil-type coils considering they are the virtually prevalent and used in many more models than the first curl pack design. BMW has been very active in redesigning the ignition whorl since 2003, even going outside of their usual OEM suppliers. It appears that they will release a revised curl for a specific model, and if it's successful at reducing complaints, they volition spread the applications to other models. For each revision, a new function number is generated (which is why there is a plethora of coil part numbers). Sometimes a new part is released but because of a supplier change.

Nearly all 2003-2016 BMW models use a coil that can trace its function number lineage back to the original 2003 function number. While we make the case that the same gyre can exist used across multiple vehicles, nosotros practise not advise mixing whorl function numbers or brands. At that place are minor differences among versions and mixing them may innovate new or different problems instead of fixing the original issue. Either buy a complete set of the same make or buy private coils that are an exact match to your existing coils.

Part #	OEM Brand	Applications	Status
1991-2002 Ignition Coils
12131703359		M50, S50US, M60	discontinued 12/1997
12131726177		M50	discontinued 1/1998
12131726178			discontinued eleven/1995
12131727108		M42	discontinued 12/1997
12131729842			discontinued 10/1992
12131730765	Bremi	M42, M50, S50US, M60	discontinued 1/1996
12131748394	Bosch	M60	discontinued vii/1993
12131748395		M50, S50US	discontinued
12137599218		M42, M50, S50US, M60	discontinued 2/2011
12137731884			discontinued 3/1996
12131734468	Bosch with connector	M42, M50, S50US, M60	agile
12131748018	Bremi	M52, M52TU, M54 (01-02), M62, M62TU, S52, S62	discontinued 12/2013
12139067830		M52	discontinued 11/1995
12137599219	Bremi without connector	M52, M52TU, M54 (01-02), M62, M62TU, S52, S62	active
2003-2016 Ignition Coils
12130148594		M54	discontinued 3/2004
12130390064	Bosch		discontinued eleven/2006
12131712219	Bosch	M54, S54	discontinued 2/2014
12137523345	Bosch		discontinued 8/2004
12137548553	Bosch		discontinued two/2009
12137551049	Bosch		discontinued 1/2008
12137551260	ERA	S54	discontinued 5/2010
12137562744			discontinued 8/2007
12137571643	Bosch	S54	discontinued v/2009
12137841558	ERA	S54	discontinued 5/2010
12137594936	Bosch	early N52	agile
12137594937	Bosch	S54	discontinued 2/2015
12137594938	Bosch	M54, S54	discontinued ten/2013
12137594596	Delphi	N20, N55	active
12138616153	Delphi	M54, N20, N26, N51, N52, N54, N55, N62B48, S54, S55	active
12138647689	Bosch	N62B48, N63TU, S54, S63TU	agile
12138657273	Eldor	N54, N62B44, N63, N73, N74, S54, S63	active
12137835108	Bremi	S85	discontinued
12137841556	Bremi	S85	active
12137838388	Bosch	S65	discontinued 9/2009
12137841754	Bosch	S65	active

If you lot weave your way through the web long enough you will notice that the vehicle applications for each part number chronicle to each other. Fifty-fifty though some function numbers are for specific models, you lot can trace its lineage back to the original. Therefore, all BMW ignition coil applications from 2003-2016 are comparable or even interchangeable. The exceptions are the S65 V8 in the E9X M3 and S85 V10 engines in the E6X M5/M6. Coil manufacturers take fabricated minor changes with each new office number and so we would strongly advise not to mix different brands and part numbers.

You may see multiple office numbers and brands listed on our site for your BMW model. Old function numbers may exist displayed because if we only used the newest BMW part number, anyone using an old number would never find what they're looking for. Even if an old part number is listed, there are no former coils sitting on shelves. Whatsoever gyre that we sell, regardless of part number, is going to be the newest version from that manufacturer. It's a rare case that we recommend the Genuine BMW function over an OEM version of the same part. Only in this instance ownership the Genuine BMW brand ensures that you get the very latest attempt at eliminating misfires and running issues. Our only strong communication is to use the same coil part number and brand on all cylinders.

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Install Tip: Snap or Popular Sound Upon Installation
This graphic was put out by Bosch in response to inquiries from technicians that newer coils no longer have a snap or pop audio when the coil is pushed onto the spark plug. Bosch says the redesign at present uses a spring inside that makes better contact with the spark plug and the snap sound is no longer present.

Click for larger.

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BMW Ignition Components - Coils, Spark Plugs, Wire Sets and Other Maintenance

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BMW and OEM Ignition Coils:

Source: https://www.bimmerworld.com/About-Us/BMW-Ignition-Coil-Info/

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