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Spark plug. Porsche 911 3.2L 1984-89 - 99917015790
99917015790/2
Vehicle Group
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Information
Spark plug WR4CC.
The spark plug produces a precisely timed electrical spark inside the combustion chamber to ignite the air-fuel mixture. This process enables efficient combustion, smooth power delivery, and reliable engine performance.
Sold individually, 6 Required per engine.
Fits:
Porsche 911 3.2L Carrera 1984 - 1989
Non Catalyst.
Spark plugs are critical to engine efficiency, power delivery, and smooth running. Over time, heat and combustion stress can reduce spark quality, leading to misfires, hesitation, and increased fuel consumption. Replacing a worn plug with this OE Match unit helps restore proper ignition timing and reliable combustion performance.
Designed as a direct replacement, this spark plug installs easily with no modification required, making it ideal for routine servicing or replacement of individual plugs.
Function:
• Generates a consistent ignition spark for proper combustion
• Supports smooth idle and responsive throttle response
• Helps maintain fuel efficiency and stable engine operation
• Direct-fit replacement for straightforward installation
A worn or degraded spark plug can cause rough running, misfires, loss of power, and poor fuel economy. Using a correct OE Match spark plug ensures ignition performance remains consistent with factory expectations, helping preserve engine reliability and long-term efficiency.
When to replace:
• Engine misfires or uneven idle
• Reduced throttle response or hesitation Increased fuel consumption
• At manufacturer-recommended service intervals
• During routine tune-ups or ignition system servicing
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99917015790
The product you are viewing cross references to these numbers
The spark plug produces a precisely timed electrical spark inside the combustion chamber to ignite the air-fuel mixture. This process enables efficient combustion, smooth power delivery, and reliable engine performance.
Sold individually, 6 Required per engine.
Fits:
Porsche 911 3.2L Carrera 1984 - 1989
Non Catalyst.
Spark plugs are critical to engine efficiency, power delivery, and smooth running. Over time, heat and combustion stress can reduce spark quality, leading to misfires, hesitation, and increased fuel consumption. Replacing a worn plug with this OE Match unit helps restore proper ignition timing and reliable combustion performance.
Designed as a direct replacement, this spark plug installs easily with no modification required, making it ideal for routine servicing or replacement of individual plugs.
Function:
• Generates a consistent ignition spark for proper combustion
• Supports smooth idle and responsive throttle response
• Helps maintain fuel efficiency and stable engine operation
• Direct-fit replacement for straightforward installation
A worn or degraded spark plug can cause rough running, misfires, loss of power, and poor fuel economy. Using a correct OE Match spark plug ensures ignition performance remains consistent with factory expectations, helping preserve engine reliability and long-term efficiency.
When to replace:
• Engine misfires or uneven idle
• Reduced throttle response or hesitation Increased fuel consumption
• At manufacturer-recommended service intervals
• During routine tune-ups or ignition system servicing
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99917015790
99917015790
WR4CC
The product you are viewing cross references to these numbers
Price: £2.63
In stock
Related products
Vehicle Group
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
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)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99760210405
The product you are viewing cross references to these numbers
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
Price: £18.50
In stock
Vehicle Group
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
Information
Heat shield for cylinder & coil pack cover
This OE Match Heat shield for the engine cylinder area is designed to protect ignition coil packs and surrounding components from heat exposure in Porsche 996 and 997 models.
Sold individually, Fits left or right side.
Fits:
Porsche 996 3.6L Carrera 2 / 4 / 4S 2002 - 2005 (Engine code: 9603)
Porsche 997.1 3.6L Carrera 2 / 4 2005 - 2008 (Engine code: 9605)
Porsche 997.1 3.8L Carrera 2S / 4S 2005 - 2008 (Engine code: 9701)
Diagram ref no 37
This product supersedes Porsche's old part number: 99610444501
The OE Match 99610444502 Heat Shield for Cylinder is a high-quality replacement component developed to replicate original Porsche specifications for fit, durability, and thermal protection. Installed on the cylinder head area, this shield acts as a protective barrier between the engine and sensitive ignition components.
Positioned directly over the ignition coil packs, this heat shield helps deflect radiant heat generated by the engine, preventing excessive temperature buildup that could affect ignition performance. It also provides protection against moisture and debris, which can contribute to premature wear or failure of ignition components.
Designed for both banks of the engine, this component fits either the left or right side, making it a versatile and essential part for maintenance or replacement. It is commonly used on Porsche 996 3.6L engines and 997 Gen 1 3.6L and 3.8L models, and supersedes earlier part number 99610444501.
Due to its location in the engine bay, the original shield is exposed to constant heat cycles and environmental conditions, making it prone to corrosion and deterioration over time. Replacing it with an OE Match unit ensures continued protection and optimal engine performance.
This heat shield protects ignition coil packs and surrounding engine components from excessive heat, helping maintain reliable ignition performance and component longevity.
Function
• Shields ignition coil packs from engine heat
• Deflects radiant heat away from sensitive components
• Protects against moisture, dirt, and debris
• Helps maintain consistent ignition performance
• Reduces risk of heat-related component failure
Heat shields in this location are highly exposed to extreme temperature changes and moisture, making them prone to rust and deterioration. A damaged or missing shield can lead to overheating of ignition components, reduced reliability, and potential misfires.
Replacing the heat shield ensures proper thermal protection and helps extend the lifespan of ignition coils and surrounding components.
When to replace
• Visible rust, corrosion, or deterioration
• Missing or damaged heat shield
• Ignition coil issues related to heat exposure
• During coil pack replacement or engine service
• Preventative maintenance on high-mileage vehicles
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610444502
The product you are viewing cross references to these numbers
This OE Match Heat shield for the engine cylinder area is designed to protect ignition coil packs and surrounding components from heat exposure in Porsche 996 and 997 models.
Sold individually, Fits left or right side.
Fits:
Porsche 996 3.6L Carrera 2 / 4 / 4S 2002 - 2005 (Engine code: 9603)
Porsche 997.1 3.6L Carrera 2 / 4 2005 - 2008 (Engine code: 9605)
Porsche 997.1 3.8L Carrera 2S / 4S 2005 - 2008 (Engine code: 9701)
Diagram ref no 37
This product supersedes Porsche's old part number: 99610444501
The OE Match 99610444502 Heat Shield for Cylinder is a high-quality replacement component developed to replicate original Porsche specifications for fit, durability, and thermal protection. Installed on the cylinder head area, this shield acts as a protective barrier between the engine and sensitive ignition components.
Positioned directly over the ignition coil packs, this heat shield helps deflect radiant heat generated by the engine, preventing excessive temperature buildup that could affect ignition performance. It also provides protection against moisture and debris, which can contribute to premature wear or failure of ignition components.
Designed for both banks of the engine, this component fits either the left or right side, making it a versatile and essential part for maintenance or replacement. It is commonly used on Porsche 996 3.6L engines and 997 Gen 1 3.6L and 3.8L models, and supersedes earlier part number 99610444501.
Due to its location in the engine bay, the original shield is exposed to constant heat cycles and environmental conditions, making it prone to corrosion and deterioration over time. Replacing it with an OE Match unit ensures continued protection and optimal engine performance.
This heat shield protects ignition coil packs and surrounding engine components from excessive heat, helping maintain reliable ignition performance and component longevity.
Function
• Shields ignition coil packs from engine heat
• Deflects radiant heat away from sensitive components
• Protects against moisture, dirt, and debris
• Helps maintain consistent ignition performance
• Reduces risk of heat-related component failure
Heat shields in this location are highly exposed to extreme temperature changes and moisture, making them prone to rust and deterioration. A damaged or missing shield can lead to overheating of ignition components, reduced reliability, and potential misfires.
Replacing the heat shield ensures proper thermal protection and helps extend the lifespan of ignition coils and surrounding components.
When to replace
• Visible rust, corrosion, or deterioration
• Missing or damaged heat shield
• Ignition coil issues related to heat exposure
• During coil pack replacement or engine service
• Preventative maintenance on high-mileage vehicles
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
Price: £26.95
Delayed delivery
Vehicle Group
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Information
Spark Plug FGR 5KQEO.
The spark plug delivers a precise electrical spark to ignite the air-fuel mixture in the combustion chamber. This critical function ensures efficient combustion, smooth engine operation, consistent power delivery, and proper fuel economy.
6 Required per engine. Price is for each.
Fits:
Porsche 996 Carrera 3.6L 2001 - 2005
Porsche 987 Boxster 2.7L / 3.2L 2005 - 2008
Porsche 987C Cayman 2.7L / 3.2L 2005 - 2008
Porsche 997 Carrera 3.6L / 3.8L 2005 - 2008
Improper or worn spark plugs can cause rough idle, poor throttle response, misfires, and reduced fuel economy. This OE Match spark plug restores proper ignition timing and combustion performance, helping your Porsche run smoothly and efficiently.
Designed for direct installation without modification, this plug is ideal for engine tune-ups, maintenance services, and restorations where an OE-equivalent part is required.
Function:
• Generates the ignition spark to start and sustain combustion
• Helps maintain smooth idle and acceleration
• Optimizes engine fuel efficiency
• Designed to match OE Porsche heat range and performance.
A worn or incorrect spark plug can lead to engine misfires, rough running, reduced power, increased emissions, poor fuel economy, and hard starting. Replacing old or degraded plugs with a high-quality OE Match spark plug ensures proper ignition, reliable starting, smooth performance, and long-term engine health.
When to replace:
• Rough idle or misfires
• Poor acceleration or throttle response
• Increased fuel consumption
• After the manufacturer’s recommended interval
• During regular engine tune-up or service
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99917022390
The product you are viewing cross references to these numbers
The spark plug delivers a precise electrical spark to ignite the air-fuel mixture in the combustion chamber. This critical function ensures efficient combustion, smooth engine operation, consistent power delivery, and proper fuel economy.
6 Required per engine. Price is for each.
Fits:
Porsche 996 Carrera 3.6L 2001 - 2005
Porsche 987 Boxster 2.7L / 3.2L 2005 - 2008
Porsche 987C Cayman 2.7L / 3.2L 2005 - 2008
Porsche 997 Carrera 3.6L / 3.8L 2005 - 2008
Improper or worn spark plugs can cause rough idle, poor throttle response, misfires, and reduced fuel economy. This OE Match spark plug restores proper ignition timing and combustion performance, helping your Porsche run smoothly and efficiently.
Designed for direct installation without modification, this plug is ideal for engine tune-ups, maintenance services, and restorations where an OE-equivalent part is required.
Function:
• Generates the ignition spark to start and sustain combustion
• Helps maintain smooth idle and acceleration
• Optimizes engine fuel efficiency
• Designed to match OE Porsche heat range and performance.
A worn or incorrect spark plug can lead to engine misfires, rough running, reduced power, increased emissions, poor fuel economy, and hard starting. Replacing old or degraded plugs with a high-quality OE Match spark plug ensures proper ignition, reliable starting, smooth performance, and long-term engine health.
When to replace:
• Rough idle or misfires
• Poor acceleration or throttle response
• Increased fuel consumption
• After the manufacturer’s recommended interval
• During regular engine tune-up or service
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99917022390
99917022390
0242245559
9991700IK22
FGR 5KQEO
The product you are viewing cross references to these numbers
Price: £5.30
In stock