What are the components and functions of a typical spark plug on BMW M3?

A regular spark plug has a metal shell, ceramic insulator and metal electrode that passes through the insulator with a side electrode connected to the outside shell. The spark plug gap between these electrodes is critical. It does not produce a spark but allows for current arcing, resulting from ignition coil transmitting high voltage to the spark plugs, which in turn initiates combustion of air/fuel mixtures inside the combustion chamber. Heat range of a spark plug affects its heat dissipation ability; deeper insulator position makes it run hotter while shallow one cools it down. An incorrect heat range may cause carbon deposits, fouling or pre-ignition. Replacement intervals depend on mileage and driving conditions with BMWs Inspection II maintenance usually falling between 30,000-40,000 miles. Furthermore, if vehicles have aluminum cylinder heads then replacement of spark plugs every two to four years is recommended due to possible corrosion. Some BMWs employ high-performance platinum spark plugs offering such advantages like better fuel efficiency and more reliable cold starts as well as reduced misfire rates. During inspection process carbon deposit could mean adjustment problems; oil fouling might indicate engine issues; damaged plug might suggest detonation. Take caution to remove one at a time in order to maintain proper cylinder order when removing each spark plug.Most importantly check their gaps if necessary adjusting them using appropriate tools.Besides cleaning them on a machine or by using wire brush before installation is inevitable.New ones should be examined and gapped suitably prior mounting.The gap recommended varies according to different models of BMWs and types of spark plugs although gapping must be done when only permitted for without weakening or breaking any side electrode while making adjustments.

Genuine BMW M3 Spark Plug

Ignition Spark Plug

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BMW M3 Spark Plugs
Part Number: 12120039634
$25.49 MSRP: $40.25
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Product Specifications
- Other Name: SPARK PLUG, HIGH POWER; Spark Plug
- Replaces: 12-12-0-038-832
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2015-2018 BMW M3 | Sedan(F80)
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BMW M3 Spark Plug
Part Number: 12120022902
$27.78 MSRP: $38.02
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Product Specifications
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2001-2006 BMW M3 | Convertible(E46), Coupe(E46)
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BMW M3 Spark Plugs
Part Number: 12120032273
$22.93 MSRP: $36.21
You Save: $13.28 (37%)
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Product Specifications
- Other Name: SPARK PLUG, HIGH POWER; Spark Plug
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2008-2013 BMW M3 | Convertible(E93), Coupe(E92), Sedan(E90)
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BMW M3 High Power Spark Plug
Part Number: 12125A4EF60
$25.49 MSRP: $40.25
You Save: $14.76 (37%)
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Product Specifications
- Other Name: SPARK PLUG, HIGH POWER; Spark Plug
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2021-2025 BMW M3 | 6 Cyl 3.0 L GAS
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BMW M3 Spark Plug
Part Number: 12129063428
$15.47 MSRP: $21.17
You Save: $5.70 (27%)
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Product Specifications
- Replaces: 12-12-1-469-529
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1995-1996 BMW M3 | Coupe(E36)
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BMW M3 Spark Plug
Part Number: 12129069877
$27.78 MSRP: $38.02
You Save: $10.24 (27%)
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Product Specifications
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1997-1999 BMW M3 | Convertible(E36), Coupe(E36), Sedan(E36)
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BMW M3 Spark Plug
Part Number: 12129064619
$15.47 MSRP: $21.17
You Save: $5.70 (27%)
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Product Specifications
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1995-1996 BMW M3 | Coupe(E36)
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BMW M3 Spark Plug
Part Number: 12129061882
$27.78 MSRP: $38.02
You Save: $10.24 (27%)
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Product Specifications
- Replaces: 12-12-1-469-532, 12-12-1-311-928
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1988-1991 BMW M3 | Coupe(E30)

BMW M3 Spark Plug

The BMW M3 Spark Plug ignites the pressurized air and fuel in each cylinder, delivering enough of a quick jolt that the performance engine can roar to life. The ignition coil produces a high-voltage spark that jumps the gap between its central and side electrodes. This spark ignites the mixture inside the engine hundreds of times per minute at idle and well over 1,000 when cruising. Therefore, reliable metallurgy and precise heat range are essential. The early M3 cars were fitted with Spark Plugs that contained a single ground electrode. However, the later M3s would also accept similar Spark Plug styles that had either multiple ground electrodes or surface discharge shapes. All of these Spark Plug types are meant to extend the firing life while also keeping combustion clean under spirited driving. Within the BMW lineup, this small part plays a huge role. Every Spark Plug either threads into the aluminum head or seals with a ceramic insulator and must keep the gap set for up to 45,000 volts to jump across without misfire. If inspection indicates oil fouling or worn tips, a new Spark Plug restores the snap for current M3 drivers and offers every BMW enthusiast peace of mind, while the full set of Spark Plug units is designed to preserve maximum response and maintain the proud BMW performance legacy.

If you are looking for OEM BMW M3 Spark Plug, we highly recommend to shop with us. Not only do we offer budget friendly prices, but we also provide fast delivery. In addition, we have a hassle-free return policy on all genuine BMW M3 Spark Plug that come backed by the manufacturer's warranty.

BMW M3 Spark Plug Parts Questions & Experts Answers

Spark Plug
12129061882
Q:
What are the components and functions of a typical spark plug on BMW M3?
Posted by Jinsung L.
A:
A regular spark plug has a metal shell, ceramic insulator and metal electrode that passes through the insulator with a side electrode connected to the outside shell. The spark plug gap between these electrodes is critical. It does not produce a spark but allows for current arcing, resulting from ignition coil transmitting high voltage to the spark plugs, which in turn initiates combustion of air/fuel mixtures inside the combustion chamber. Heat range of a spark plug affects its heat dissipation ability; deeper insulator position makes it run hotter while shallow one cools it down. An incorrect heat range may cause carbon deposits, fouling or pre-ignition. Replacement intervals depend on mileage and driving conditions with BMWs Inspection II maintenance usually falling between 30,000-40,000 miles. Furthermore, if vehicles have aluminum cylinder heads then replacement of spark plugs every two to four years is recommended due to possible corrosion. Some BMWs employ high-performance platinum spark plugs offering such advantages like better fuel efficiency and more reliable cold starts as well as reduced misfire rates. During inspection process carbon deposit could mean adjustment problems; oil fouling might indicate engine issues; damaged plug might suggest detonation. Take caution to remove one at a time in order to maintain proper cylinder order when removing each spark plug.Most importantly check their gaps if necessary adjusting them using appropriate tools.Besides cleaning them on a machine or by using wire brush before installation is inevitable.New ones should be examined and gapped suitably prior mounting.The gap recommended varies according to different models of BMWs and types of spark plugs although gapping must be done when only permitted for without weakening or breaking any side electrode while making adjustments.
Answered by BMW Parts Specialist Armando / Apr 21, 2023