This is the NGK replacement spark plug for BMW part # 12120037607 and 12129071003. NGK has been one a top choice of automakers and mechanics since 1936 for obvious reasons. With manufacturing, quality control and consistency standards second to none, this is truly a name you trust. Turner Motorsport proudly carries the NGK brand with applications that cover all BMW/Mini models.
It is the standard spark plug for: 1998-1999 E36 BMW 323is 323ic 1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi 1997-2003 E39 BMW 528i 540i 1997-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i 2003-2006 E85 BMW Z4 2.5i Z4 3.0i
Also used by BMW as a "High Power" spark plug for various BMW Models including: 1990-1991 E30 BMW 318i 318is 318ic 1992-1998 E36 BMW 318i 318is 318ti 318ic 325i 325is 325ic 328i 328is 328ic 1989-1995 E34 BMW 530i 540i 1997-2003 E39 BMW 525i 530i 2004-2005 E60 BMW 525i 530i 545i 2004-2005 E63 BMW 645ci 1988-1994 E32 BMW 740i 740il 750il 1995-2001 E38 BMW 740i 740il 750il 2002-2008 E65 BMW 745i 745li 2002-2008 E65 BMW 760i 760li 1990-1999 E31 BMW 840i 840ci 850i 850ci 2004-2005 E83 BMW X3 2.5i X3 3.0i 2000-2006 E53 BMW X5 3.0i X5 4.4i X5 4.6is 1997-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
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ssentially, spark plugs are the pulse of your engine. It forces electricity to arc across a gap and the electricity must be at a very high voltage. As the piston travels up the first time, compressing the air-fuel mixture inside the combustion chamber, the distributor sends an energy surge along the spark plug wire. Once the piston reaches the top, the spark plug fires, igniting the air-fuel mixture and forcing the piston back down, creating power. As you can see, the spark plug is a very important part of the engine. Therefore, in order to maintain the highest performance a car can offer, care should be taken to perform the proper scheduled maintenance in a timely fashion. When your spark plugs are worn out, you will notice a decrease it power and efficiency, so be sure to replace them as soon as possible to restore your vehicle’s performance.
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High-performance spark plugs are recommended only when used with highly-tuned engines that see a lot of high-RPM work (TMS head, cams, etc). Over time spark plugs become contaminated, worn, and "fouled out". This can cause a weak or missing spark leading to issues with fuel efficiency, misfires, check engine codes, and poor idle or even direct damage to your catalytic converter. As a leading source of high-performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!
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