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Spark Plugs

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DISPLAYING 1 to 16 (of 17 products)
1 2
99760210405/1.1KIT
Product Information
Product Information
Ignition Coils Packs (PACK OF 6). New longer bolts
Porsche 996 / Boxster 986 / Boxster 987 / 996 GT3 MKII

beru

same as 99760210404/1

PACK OF 6

Fits:
Porsche 996 3.6L Inc C2 / C4 / C4S
Porsche 986 Boxster 2.7L / 3.2L 3.4L 2003>>
Porsche 996 GT3 MKI
Porsche 996 GT3 MKII
Porsche 996 Turbo
Porsche 987 Boxster 2.7L / 3.2L
Porsche 987C Cayman 2.7L / 3.4L
Porsche 997 3.6L, 3.8L / 997 GT3

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99760210405
99760210400
99760210402
99660210400
99760210404
99760210400
99760210405
997.602.104.05
997 602 104 05
997.602.104.04
997 602 104 04
997.602.104.02
997 602 104 02
99760210406
997.602.104.06
997 602 104 06
99760210403
997.602.104.03
997 602 104 03
99760210401
997.602.104.01
997 602 104 01
997.602.104.00
997 602 104 00
996.602.104.00
996 602 104 00
99760210700
997.602.107.00
997 602 107 00
99660210101
996.602.101.01
996 602 101 01
99660210501
996.602.105.01
996 602 105 01
99660210500
996.602.105.00
996 602 105 00
9760210702
90038502501
900.385.025.01
900 385 025 01
99660210100
996.602.101.00
996 602 101 00
99917022390
99610532552

The product you are viewing cross references to these numbers
99760210405/3KIT
Product Information
Product Information
Ignition coil. 6 Required per engine. SET OF 6
The 99760210405 is the individual coil module used on the Porsche M96 and M97 M-series engines in many 986/996/987/early 997 cars. Normally should be replaced as a set of six coils (one per cylinder) 


Why these coils should be replaced 

Age / thermal breakdown: coils are exposed to heat cycles and can develop internal insulation breakdown or hairline cracks in the housing. Over time this causes weak or leaking high voltage and intermittent sparks. 

 Misfire symptoms: a failing coil will cause single-cylinder misfires (P030x codes), rough idle, reduced power, increased fuel consumption and catalytic converter heating/damage if left. These are the most common reasons owners replace coils. 

Carbon tracking / cracking: visible cracks or carbon tracking on the coil boot can provide a leakage path for spark, reducing performance and causing intermittent faults. 

Connector / wiring issues: corroded or loose coil connectors can mimic coil failures; inspect connectors when replacing coils.  


Fits:
Porsche 996 3.6L Inc C2 / C4 / C4S
Porsche 986 Boxster 2.7L / 3.2L 2003>>
Porsche 996 GT3 MKI
Porsche 996 GT3 MKII
Porsche 996 Turbo
Porsche 987 Boxster 2.7L / 3.2L
Porsche 987C Cayman 2.7L / 3.4L
Porsche 997 3.6L, 3.8L / 997 GT3

Does not come with securing bolts.
2 required per coil, please order separately (part number 90006708901).

Common issues reported in practice 

One or more cylinders misfire when the engine is hot but behave quite normally when cold (typical of internal coil failure or heat-sensitive cracks). Cracked coil housings on Boxster/996 cars, owners often replace the entire set for reliability. After a spark plug change, misfires appear because weakened coils can fail once higher-voltage plugs are installed; this is a frequently reported pattern.


How to diagnose (practical steps)

Read codes: P0300 / P0301–P0306 point to misfires; note which cylinder is affected.Swap test: swap the suspected coil with another cylinder’s coil — if the misfire follows the coil, the coil is bad. (Common, quick field test used by owners.)Measure resistance: check primary and secondary coil resistances at ~20°C and compare to the ranges above.Visual inspection: look for cracks, carbon tracking, oil ingress, or damaged boots/connectors.Oscilloscope / HV probe: for deeper diagnosis a scope or HV probe can show spark energy, but most DIY diagnostics use swap + resistance checks. 



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99760210405
99760210400
99760210402
99660210400
99760210404
99760210400
0986221119

The product you are viewing cross references to these numbers
4201Rx6
Product Information
Product Information
Performance Ignition Coil Pack.  6 Required per engine. PACK OF 6.


Fits:
Porsche 911 (996)
Porsche 911 (997)
Porsche Boxster
Porsche Cayman

The Plasma Direct is an ignition coil with a built-in high-power amplifier. Plasma Direct Coils produce 4 times more spark energy than stock coils, and generate an ultra-fast multi-spark-discharge of 10 sparks up to highest RPM.

The spark amperage is increased by 100%, allowing the spark to reach many more molecules, which therefore accelerates the ignition and combustion processes. This is extremely important in forced induction applications, but also improves the performance of normally aspirated engines.
The Plasma Direct will increase horsepower and torque throughout the entire RPM range, as well as reducing fuel consumption. Even engines with legendary smoothness will be further refined with the Plasma Direct upgrade. Plasma Direct coils are OBD II compliant.

- 100% secondary current (Spark Amperage) increase.
- 4 times spark energy increase for the initial spark discharge.
- 8% Fuel Saving
- Easy installation.
- Compatible with all OEM components.
- Compatible with OBD-II (On-Board-Diagnostics).



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

4201Rx6
99760210402
99760210400
99660210400
99760210404
0986221119
90660210200
90660210301
99660210100
99660210101
99660210200
99760210401
99760210700
99760210702
99760210406
99760210405
90660210101
99760210703
4201R

The product you are viewing cross references to these numbers
99917022390/1x6
Product Information
Product Information
Spark Plugs (PACK OF 6). Porsche 996 3.6L / 987 / 987C / 997
PACK OF 6

bosch

Fits:
Porsche 996 Carrera 3.6L 2001>>
Porsche 987 Boxster 2.7L / 3.2L 2005-08
Porsche 987C Cayman 2.7L / 3.2L 2005-08
Porsche 997 Carrera 3.6L / 3.8L 2005-08

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99917022390
99917022390
0242245559

The product you are viewing cross references to these numbers
Special Order item
99610444502
Product Information
Product Information
Heat Shield for Cylinder & Coil pack cover.  Fits left or right side 

 
porsche

Fits:
Porsche 996 C2 / C4 / C4S 2002>>
Porsche 997 MKI C2 / C2S 2005-08 COUPE/CABRIO

Diagram ref no 37.


This product supersedes Porsche's old part number:
- 996 104 445 01.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99610444502
99610444502
99610444501

The product you are viewing cross references to these numbers
99610444502/1
Product Information
Product Information
Heat Shield for Cylinder & Coil pack cover.  Fits left or right side 

 
oematch

Fits:
Porsche 996 C2 / C4 / C4S - 2002>>
Porsche 997 MKI C2 / C2S - 2005 to 2008 

Click 'Zoom in' for large parts diagram.
Diagram ref no 37

This product supersedes Porsche's old part number:
- 996 104 445 01



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99610444502
99610444502
99610444501

The product you are viewing cross references to these numbers
Special Order item
90006708901
Product Information
Product Information
porsche

Ignition Coil Pack Screw. M6 X 25

Note: These are for use with the original smaller bodied Porsche ignition coils. If in doubt please seek clarification before purchase/installation.

12pcs Required per car

Fits:
Porsche 996
Porsche 986 Boxster
Porsche 996 GT3 MKI
Porsche 996 GT3 MKII
Porsche 996 Turbo
Porsche 987
Porsche 987C Cayman
Porsche 997 3.6L, 3.8L / 997 GT3

Click 'Zoom in' for large parts diagram.
Diagram ref no 3

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

90006708901
90006708901
90006700801

The product you are viewing cross references to these numbers
Special Order item
90038502501
Product Information
Product Information
porsche

Ignition Coil Pack Torx Screw. M6 X 40

Note: These are for use with the larger body type modified Porsche coil packs, not the smaller bodied coil packs originally installed by Porsche. If in doubt please seek clarification before purchase/installation.

12 pcs Required per car

Fits:
Porsche 996
Porsche 986 Boxster
Porsche 996 GT3 MKI
Porsche 996 GT3 MKII
Porsche 996 Turbo
Porsche 987
Porsche 987C Cayman
Porsche 997 3.6L, 3.8L / 997 GT3

Click 'Zoom in' for large parts diagram.
Diagram ref no 3



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

90038502501
90038502501

The product you are viewing cross references to these numbers
Special Offer
99760210405/1
Product Information
Product Information
Ignition coil. Includes longer mounting bolts.
6 Required per engine. Price is for each.

beru

Fits:
Porsche Boxster 986 2.5L 1997-99
Porsche Boxster 986 2.7L 2003-2004
Porsche Boxster S 986 3.2L 2003-2004

Porsche 996 C2 3.4L 1997-08/01
Porsche 996 C4 3.4L 1997-08/01
Porsche 996 3.6L Inc. C2 / C4 / C4S
Porsche 996 GT3 MKI
Porsche 996 GT3 MKII
Porsche 996 Turbo

Porsche 987 Boxster 2.7L / 3.2L
Porsche 987C Cayman 2.7L / 3.4L

Porsche 997 3.6L, 3.8L / 997 GT3

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99760210405
99660210400
99760210404
0986221119
90660210200
90660210301
99660210100
99660210101
99660210200
99660210400
99760210400
99760210401
99760210402
99760210404
99760210700
99760210702
245752
2504992
99760210405
90660210101
99760210704
99760210703

The product you are viewing cross references to these numbers
Special Offer
99760210405/3
Product Information
Product Information
Ignition coil. 6 Required per engine. Price is for each.
The 99760210405 is the individual coil module used on the Porsche M96 and M97 M-series engines in many 986/996/987/early 997 cars. Normally should be replaced as a set of six coils (one per cylinder) 


Why these coils should be replaced 

Age / thermal breakdown: coils are exposed to heat cycles and can develop internal insulation breakdown or hairline cracks in the housing. Over time this causes weak or leaking high voltage and intermittent sparks. 

 Misfire symptoms: a failing coil will cause single-cylinder misfires (P030x codes), rough idle, reduced power, increased fuel consumption and catalytic converter heating/damage if left. These are the most common reasons owners replace coils. 

Carbon tracking / cracking: visible cracks or carbon tracking on the coil boot can provide a leakage path for spark, reducing performance and causing intermittent faults. 

Connector / wiring issues: corroded or loose coil connectors can mimic coil failures; inspect connectors when replacing coils.  


Fits:
Porsche 996 3.6L Inc C2 / C4 / C4S
Porsche 986 Boxster 2.7L / 3.2L 2003>>
Porsche 996 GT3 MKI
Porsche 996 GT3 MKII
Porsche 996 Turbo
Porsche 987 Boxster 2.7L / 3.2L
Porsche 987C Cayman 2.7L / 3.4L
Porsche 997 3.6L, 3.8L / 997 GT3

Does not come with securing bolts.
2 required per coil, please order separately (part number 90006708901).

Common issues reported in practice 

  • One or more cylinders misfire when the engine is hot but behave quite normally when cold (typical of internal coil failure or heat-sensitive cracks). 
  • Cracked coil housings on Boxster/996 cars, owners often replace the entire set for reliability. 
  • After a spark plug change, misfires appear because weakened coils can fail once higher-voltage plugs are installed; this is a frequently reported pattern.

How to diagnose (practical steps)

  • Read codes: P0300 / P0301–P0306 point to misfires; note which cylinder is affected.
  • Swap test: swap the suspected coil with another cylinder’s coil — if the misfire follows the coil, the coil is bad. (Common, quick field test used by owners.)
  • Measure resistance: check primary and secondary coil resistances at ~20°C and compare to the ranges above.
  • Visual inspection: look for cracks, carbon tracking, oil ingress, or damaged boots/connectors.
  • Oscilloscope / HV probe: for deeper diagnosis a scope or HV probe can show spark energy, but most DIY diagnostics use swap + resistance checks. 



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99760210405
99760210400
99760210402
99660210400
99760210404
99760210400
0986221119
90660210200
90660210301
99660210100
99660210101
99660210200
99660210400
99760210400
99760210401
99760210402
99760210404
99760210700
99760210702
245752
2504992
99760210406
99760210405
90660210101

The product you are viewing cross references to these numbers
Special Order item
99760210405
Product Information
Product Information
Ignition Coil.
x6 Required Per Engine.
Price Is For Each.


Original Porsche
Please Note: If you have the older original Porsche part number 99760210400 ignition coils fitted to your vehicle you will need new longer bolts with the new original Porsche ignition coils 99760210402. The bolts part number is 90038502501 (you will need x12). This does not apply when ordering Beru brand ignition coils.

Fits:
Porsche 996 C2 / C4 / C4S 3.6L 2002>>2005
Porsche 986 Boxster 2.7L / 3.2L 2003>>2004
Porsche 996 GT3 MKI & MKII 1999>>2005
Porsche 996 Turbo 2000>>2005
Porsche 987 Boxster 2.7L / 3.2L MKI 2005>>2008
Porsche 987C Cayman 2.7L / 3.4L MKI 2006>>2008
Porsche 997 Carrera / Carrera S / Carrera 4 / Carrera 4S 3.6L / 3.8L MKI 2005>>2008
Porsche 997 GT3 2007>>2008
Porsche 997.2 GT2 RS 2007>>2009

Diagram Ref No 1

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99760210405
99760210400
99760210402
99660210400
99760210404
99760210400
0986221119
90660210200
90660210301
99660210100
99660210101
99660210200
99660210400
99760210400
99760210401
99760210402
99760210404
99760210700
99760210702
245752
2504992
99760210406
99760210405
99760210704

The product you are viewing cross references to these numbers
Special Offer
99970176141/1
Product Information
Product Information
Spark plug shaft seal. 28 x 2.

elring

Fits:
Porsche 986 Boxster 2.7L / 3.2L 2002-04
Porsche 987.1 Boxster 2.7L / 3.2L / 3.4L 2005-08
Porsche 987C.1 Cayman 2.7L / 3.4L 2005-08
Porsche 996 Carrera 3.6L 2001-05
Porsche 997.1 Carrera 3.6 / 3.8L 2004-08

Click 'Zoom in' for large parts diagram.
Diagram ref no 33

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99970176141
99970176140
99970176141
260.470
99610532552
996.105.325.52
260.470

The product you are viewing cross references to these numbers
Special Order item
99970176141
Product Information
Product Information
Spark plug shaft seal. 28 x 2.

porsche

Fits:
Porsche 986 Boxster 2.7L / 3.2L 2002-04
Porsche 987.1 Boxster 2.7L / 3.2L / 3.4L 2005-08
Porsche 987C.1 Cayman 2.7L / 3.4L 2005-08
Porsche 996 Carrera 3.6L 2001-05
Porsche 997.1 Carrera 3.6 / 3.8L 2004-08

Click 'Zoom in' for large parts diagram.
Diagram ref no 33

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99970176141
99970176140
99970176141
260.470
99610532552
996.105.325.52
260.470

The product you are viewing cross references to these numbers
Special Order item
99660210500
Product Information
Product Information
Spark plug socket.
6 Required per engine. Price is for each.

porsche

Fits:
Porsche 986 Boxster 2.7L / S 3.2L 2003-04
Porsche 987 Boxster MKI 2005-08
Porsche 987 C Cayman MKI 2005-08
Porsche 996 Carrera 2/4/4S 3.6L 2002-05
Porsche 996 Turbo 2001-05
Porsche 997 Carrera 2005-08
Porsche 997 Turbo 2007-09
Porsche 996 GT3 1999-05
Porsche 997 GT3 >>2008

Click 'Zoom in' for large parts diagram.
Diagram ref no 2

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99660210500
99660210500

The product you are viewing cross references to these numbers
Special Offer
99660210500/1
Product Information
Product Information
Spark Plug Socket.
6 Required per engine. Price is for each.

beru

Fits:
Porsche 986 Boxster 2.7L / S 3.2L 2003-04
Porsche 987 Boxster MKI 2005-08
Porsche 987 C Cayman MKI 2005-08
Porsche 996 Carrera 2/4/4S 3.6L 2002-05
Porsche 996 Turbo 2001-05
Porsche 997 Carrera 2005-08
Porsche 997 Turbo 2007-09
Porsche 996 GT3 1999-05
Porsche 997 GT3 >>2008

Click 'Zoom in' for large parts diagram.
Diagram ref no 2

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99660210500
99660210500
99660210501

The product you are viewing cross references to these numbers
Special Order item
99917022390
Product Information
Product Information
Spark Plug FGR 5KQEO.
6 Required per engine. Price is for each.

porsche

Fits:
Porsche 996 Carrera 3.6L 2001>>
Porsche 987 Boxster 2.7L / 3.2L 2005-08
Porsche 987C Cayman 2.7L / 3.2L 2005-08
Porsche 997 Carrera 3.6L / 3.8L 2005-08

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99917022390
99917022390
0242245559
9991700IK22

The product you are viewing cross references to these numbers
DISPLAYING 1 to 16 (of 17 products)
1 2
Also found on these pages
About Spark Plugs

Porsche Spark Plugs | Design911 High-Performance Ignition Components for Power & Efficiency

Spark plugs play a vital role in the performance, efficiency, and reliability of your Porsche’s engine. They ignite the air-fuel mixture inside the combustion chamber, creating the precise explosion needed to generate power. High-quality spark plugs ensure clean ignition, smooth acceleration, and reduced emissions — helping your Porsche perform exactly as intended on every drive.

At Design911, we stock a full range of spark plugs from leading manufacturers, engineered for superior conductivity, heat resistance, and long service life. Available in iridium, platinum, and copper-core designs, each spark plug is precision-crafted to match your Porsche’s specific ignition requirements. Ideal for routine maintenance, tuning, or complete engine rebuilds, our spark plugs ensure reliable performance from idle to redline.

What Do Spark Plugs Do?

Spark plugs are critical ignition components that deliver the electric spark required to ignite the air-fuel mixture in the combustion chamber.

Core Functions:
• Create a high-voltage spark to initiate combustion.
• Ensure smooth, efficient engine operation.
• Support optimal fuel economy and throttle response.
• Reduce emissions through clean, consistent ignition.
• Maintain balanced power delivery and idle stability.

When properly maintained, spark plugs enhance both performance and fuel efficiency, ensuring your Porsche runs with precision and reliability.

Why Do Spark Plugs Fail or Degrade?

Spark plugs operate under intense pressure, heat, and chemical exposure — gradually wearing down over time and mileage.

Common Causes of Failure Include:
• Electrode wear from prolonged high-temperature operation.
• Carbon or oil fouling from incomplete combustion.
• Cracked or degraded insulators due to thermal stress.
• Incorrect heat range or plug gap settings.
• Age-related corrosion or weakened spark performance.

Failing spark plugs can cause rough idling, misfires, reduced fuel economy, and loss of power — making regular replacement essential to maintain your Porsche’s performance.

Why Replace or Upgrade Your Porsche Spark Plugs?

Replacing worn spark plugs restores full ignition efficiency, fuel economy, and responsiveness. Upgrading to performance-grade materials can also improve durability and spark precision for motorsport or tuned applications.

Key Benefits:
• Restores smooth acceleration and idle stability.
• Improves fuel efficiency and throttle response.
• Reduces misfires, vibration, and engine hesitation.
• Available in platinum, iridium, and copper-core configurations.
• Compatible with Porsche 911, 944, 968, Boxster, Cayman, Panamera, and Macan models.
• Ideal for servicing, tuning, or complete engine rebuilds.

Design911’s Porsche spark plugs deliver performance, precision, and protection — ensuring consistent ignition and long-lasting reliability for your Porsche engine.

Highlights

• Premium Porsche spark plugs for all engine types.
• Precision-engineered for reliable combustion and performance.
• Available in standard and high-performance variants.
• Improves efficiency, throttle response, and emissions.
• Fits both classic and modern Porsche models.
• Perfect for servicing, performance tuning, or restoration.

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