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Spark Plugs
PACK OF 8
Fits:
Porsche 955 Cayenne S 4.5L
Porsche 955 Cayenne Turbo 4.5L
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94860210422
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
PACK OF 8
Fits:
Porsche Cayenne V8 Turbo M48.50
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99917010390
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
OE Match ignition coil pack for Porsche 955 Cayenne S, Turbo and Turbo S 4.5L applications. Supplied individually; eight coils are required for a complete engine.
Fits
- Porsche 955 Cayenne S 4.5L V8 2003–06
- Porsche 955 Cayenne Turbo 4.5L 2003–06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
What This Product Does
The coil transforms the battery's low-voltage electrical supply into the high voltage needed by the spark plug to ignite the mixture inside a cylinder. It is an ignition component, not a replacement spark plug.
Functions
- Produces the high voltage required for spark generation.
- Supplies ignition energy to the associated spark plug.
Technical Details
- Product reference: 94860210422.
- Brand: OE Match.
- Diagram engine notation: M48.00/50, referring to M48.00 and M48.50 applications.
- 8 Required per engine. Supplied as an individual coil, not an eight-piece set.
- Supplied Porsche reference numbers: 94860210400, 94860210401, 94860210403, 94860210405, 94860210407, 94860210408, 94860210409, 94860210420, 94860210421, 94860210422, 98060290400, 98060290401, 98060290403.
- Additional supplied cross-references: 0040102002, 0040102012, ZSE012.
Symptoms of Fault
Possible signs include misfiring during acceleration, uneven idling, difficult starting, hesitation, increased fuel consumption or an engine warning light. Intermittent faults may become more noticeable when the engine is hot. Cracks or evidence of electrical tracking around the coil also warrant inspection.
Why Replacement Matters
A confirmed coil fault can interrupt spark delivery and cause recurring ignition problems. Replacement addresses the failed component, but similar symptoms can originate from worn plugs, damaged wiring, poor earth connections or injector faults. Inspect these related items rather than assuming that a misfire code proves the coil is defective.
FAQs
Must all eight coils be replaced together?
A diagnosed fault may require only one replacement. Review the condition and service history of the remaining coils before deciding whether further renewal is appropriate.
Can a coil fault appear only when warm?
Yes. Heat-related internal deterioration can produce intermittent symptoms, so testing should consider the conditions in which the fault occurs.
What should be checked before fitting?
Confirm the vehicle application and original reference, then examine the spark plug, electrical connector, wiring and earth connections. The cross-references above do not replace a vehicle-specific compatibility check.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94860210422
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
8 Required per engine. Price is for each.
Fits:
Porsche 955 Cayenne S 4.5L
Porsche 955 Cayenne Turbo 4.5L
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94860210422
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
8 Required per engine. Price is for each.
Fits:
Porsche 955 Cayenne S 4.5L
Porsche 955 Cayenne Turbo 4.5L
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94860210422
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
8 Required per engine. Price is for each.
Fits:
Porsche 955 Cayenne V8 Turbo M48.50
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99917022190
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
8 Required per engine. Price is for each.
Fits:
Porsche Cayenne V8 Turbo M48.50
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99917022190
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
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.