Is correct spark plug function vital for proper engine operation, and what are the key considerations for installation and maintenance on BMW Z4?

Spark plug operation is essential for normal running of engines thus calling for correct spark plugs to be fitted as recommended for the particular car. If the correct plugs are specified for the engine and the engine is in a healthy state, they should not require attention between their specified replacement intervals and cleaning is seldom required unless facilities are available whereby the electrodes will not be damaged. Ignition coils are fitted in top center of the cylinder head with spark plugs situated below them. To take them off the valve cover and the ignition coils have to be removed at first. Using a spark plug wrench or a deep socket and a little extension bar, unscrew the plugs and make sure that end of the socket does not snap off. Looking at the spark plugs can therefore give the condition of the engine; a light gray color with white matter inside, indicating a lean mixture, or white insulator tip meaning that the plug is too hot while hard black deposits on the plugs mean a rich mixture. Black and shiny plugs justify it and oily plugs may fit an engine with high usage and wear while light tan to grayish-brown proves right mixture and good performance of engine. Multi-ground, platinum or iridium spark plugs are also recommended, they are pre-gapped and it is advisable not to adjust them as it would degauge the plating. Before installing the sleeves, the threaded connectors should be tightened good and the plug surface should be clean, this will reduce cases of cross threading; use a small piece of hose to bring both parts into position. The plugs must then be tightened up to the required torque after which the ignition coils should be replaced.

Genuine BMW Z4 Spark Plug

Ignition Spark Plug

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14 Spark Plugs found

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BMW Z4 High Power Spark Plug
Part Number: 12122455258
$20.58 MSRP: $32.50
You Save: $11.92 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Spark plug, High Power; Spark Plug
- Replaces: 12-12-0-046-646
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2019-2025 BMW Z4 | 4 Cyl 2.0 L GAS, 6 Cyl 3.0 L GAS, M40i(G29), sDrive30i(G29)
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BMW Z4 Spark Plugs
Part Number: 12120039664
$19.61 MSRP: $30.96
You Save: $11.35 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: SPARK PLUG, HIGH POWER; Spark Plug
- Replaces: 12-12-0-038-896, 12-12-0-038-704
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2012-2016 BMW Z4 | sDrive28i(E89)
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BMW Z4 Spark Plugs
Part Number: 12120037607
$27.78 MSRP: $38.02
You Save: $10.24 (27%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: SPARK PLUG, HIGH POWER; Spark Plug
- Replaces: 12-12-0-141-871
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2003-2005 BMW Z4 | 2.5i(E85), 3.0i(E85)
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BMW Z4 Spark Plugs
Part Number: 12120037244
$15.69 MSRP: $24.77
You Save: $9.08 (37%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: SPARK PLUG, HIGH POWER; Spark Plug
- Replaces: 12-12-0-034-087
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2009-2016 BMW Z4 | sDrive35i(E89), sDrive35is(E89)
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BMW Z4 Spark Plugs (UP TO 12/09)
Part Number: 12122158253
$19.61 MSRP: $30.96
You Save: $11.35 (37%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: SPARK PLUG, HIGH POWER; Spark Plug
- Replaces: 12-12-0-035-915, 12-12-0-032-137, 12-12-0-032-138
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2006-2011 BMW Z4 | Coupe 3.0si(E86), Roadster 3.0i(E85), Roadster 3.0si(E85), sDrive30i(E89)
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BMW Z4 Spark Plugs (FROM 12/09)
Part Number: 12120037663
$17.64 MSRP: $27.85
You Save: $10.21 (37%)
Ships in 1-3 Business Days
ADD TO CART
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:
- 2009-2011 BMW Z4 | sDrive30i(E89)
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BMW Z4 High Power Spark Plug
Part Number: 12120035915
$19.61 MSRP: $30.96
You Save: $11.35 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark plug, High Power
- Replaced by: 12122158253
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2006-2011 BMW Z4 | Coupe 3.0si(E86), Roadster 3.0i(E85), Roadster 3.0si(E85), sDrive30i(E89)
View related parts
BMW Z4 High Power Spark Plug
Part Number: 12120038704
$19.61 MSRP: $30.96
You Save: $11.35 (37%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark plug, High Power
- Replaced by: 12120039664
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2012-2016 BMW Z4 | sDrive28i(E89)
View related parts
BMW Z4 High Power Spark Plug
Part Number: 12120032137
$19.61 MSRP: $30.96
You Save: $11.35 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark plug, High Power
- Replaced by: 12122158253
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2006-2011 BMW Z4 | Coupe 3.0si(E86), Roadster 3.0i(E85), Roadster 3.0si(E85), sDrive30i(E89)
View related parts
BMW Z4 High Power Spark Plug
Part Number: 12120038896
$19.61 MSRP: $30.96
You Save: $11.35 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark plug, High Power
- Replaced by: 12120039664
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2012-2016 BMW Z4 | sDrive28i(E89)
View related parts
BMW Z4 High Power Spark Plug
Part Number: 12120032138
$19.61 MSRP: $30.96
You Save: $11.35 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark plug, High Power
- Replaced by: 12122158253
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2006-2011 BMW Z4 | Coupe 3.0si(E86), Roadster 3.0i(E85), Roadster 3.0si(E85), sDrive30i(E89)
View related parts
BMW Z4 High Power Spark Plug
Part Number: 12120034087
$15.69 MSRP: $24.77
You Save: $9.08 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark plug, High Power
- Replaced by: 12120037244
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2009-2016 BMW Z4 | sDrive35i(E89), sDrive35is(E89)
View related parts
BMW Z4 High Power Spark Plug
Part Number: 12120141871
$27.78 MSRP: $38.02
You Save: $10.24 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark plug, High Power
- Replaced by: 12120037607
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2003-2005 BMW Z4 | 2.5i(E85), 3.0i(E85)
View related parts
BMW Z4 High Power Spark Plug
Part Number: 12129071003
Product Specifications
- Other Name: Spark plug, High Power; Spark Plug
- Replaces: 12-12-0-030-548
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2003-2005 BMW Z4 | 2.5i(E85), 3.0i(E85)

BMW Z4 Spark Plug

BMW Z4 Spark Plug is the tiny but critical torch that ignites the fuel air mix so each drive can be off to the races with the instant energy and smooth power. Inside every cylinder is the Spark Plug that receives high voltage from the coil, jumps a gap between its center and side electrodes, and ignites the compressed gases hundreds of times each minute, pushing down on pistons for brisk acceleration in your roadster BMW. Continual exposure to searing heat, pressure fluctuations and chemicals means that the Spark Plug gradually erodes and in the case when wear has set in, your engine will hesitate, misfire or start hard, which will cause even greater damage to the catalytic converter and clutch if not attended to. A fresh modern Spark Plug is vital to keep your engine running to factory performance standards as every Z4 engine should. Over the years, BMW fitted the Z4 with premium Bosch plugs, which incorporate durable materials and precise heat ranges to retain their gap longer than earlier styles of copper. This results in a longer service life while maintaining clean emissions. Timely renewal of each Spark Plug restores crisp throttle response and allows the BMW Z4 to continue to provide its signature sporty feel.

If you are looking for OEM BMW Z4 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 Z4 Spark Plug that come backed by the manufacturer's warranty.

BMW Z4 Spark Plug Parts Questions & Experts Answers

Spark Plugs
12120037607
Q:
Is correct spark plug function vital for proper engine operation, and what are the key considerations for installation and maintenance on BMW Z4?
Posted by Jack N.
A:
Spark plug operation is essential for normal running of engines thus calling for correct spark plugs to be fitted as recommended for the particular car. If the correct plugs are specified for the engine and the engine is in a healthy state, they should not require attention between their specified replacement intervals and cleaning is seldom required unless facilities are available whereby the electrodes will not be damaged. Ignition coils are fitted in top center of the cylinder head with spark plugs situated below them. To take them off the valve cover and the ignition coils have to be removed at first. Using a spark plug wrench or a deep socket and a little extension bar, unscrew the plugs and make sure that end of the socket does not snap off. Looking at the spark plugs can therefore give the condition of the engine; a light gray color with white matter inside, indicating a lean mixture, or white insulator tip meaning that the plug is too hot while hard black deposits on the plugs mean a rich mixture. Black and shiny plugs justify it and oily plugs may fit an engine with high usage and wear while light tan to grayish-brown proves right mixture and good performance of engine. Multi-ground, platinum or iridium spark plugs are also recommended, they are pre-gapped and it is advisable not to adjust them as it would degauge the plating. Before installing the sleeves, the threaded connectors should be tightened good and the plug surface should be clean, this will reduce cases of cross threading; use a small piece of hose to bring both parts into position. The plugs must then be tightened up to the required torque after which the ignition coils should be replaced.
Answered by BMW Parts Specialist Tony / Nov 10, 2025

Genuine BMW Z4 Spark Plug

14 Spark Plugs found

BMW Z4 High Power Spark Plug

BMW Z4 Spark Plugs

BMW Z4 Spark Plugs

BMW Z4 Spark Plugs

BMW Z4 Spark Plugs (UP TO 12/09)

BMW Z4 Spark Plugs (FROM 12/09)

BMW Z4 High Power Spark Plug

BMW Z4 High Power Spark Plug

BMW Z4 High Power Spark Plug

BMW Z4 High Power Spark Plug

BMW Z4 High Power Spark Plug

BMW Z4 High Power Spark Plug

BMW Z4 High Power Spark Plug

BMW Z4 High Power Spark Plug

BMW Z4 Spark Plug

BMW Z4 Spark Plug Parts Questions & Experts Answers

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