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OE Match
Common issues and observations as this item is moisture and condensation sensitive
Older 911 models especially 964's may experience performance issues like misfires or poor starting if condensation or rainwater enters the distributor cap. some customer have reported that sealing the cap to the body with silicone or using ignition sealant may help—but even then, some variations in ignition components can affect susceptibility.
General Wear and Maintenance
As a plastic ignition component, caps can age or deteriorate over time—leading to cracking, arcing, or poor spark distribution. While not heavily documented in sources, routine inspection and replacement are recommended for high-mileage cars. 
Fits:
Porsche 964 1989-94
Porsche 993 09/1989 - 08/1997
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93060291901
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
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Fits:
Porsche 928 5.0L / 5.4L
Porsche 944S2
Porsche 944S 16V 1986-88
Porsche 968 1992-95 ALL
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92860221101
The product you are viewing cross references to these numbers
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
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Porsche Distributor Cap
The Distributor Cap is an essential component
of the ignition system fitted to selected Porsche 928, Porsche 924S and Porsche
944 models. Designed to distribute high-voltage electrical current from the
ignition coil to the correct spark plug via the rotor arm, the distributor cap
plays a critical role in ensuring accurate ignition timing, efficient
combustion and reliable engine performance.
Fits:
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 928S2 4.7L 1984-86
Every time the engine runs, the distributor cap channels electrical energy to each cylinder in the correct firing order. Over thousands of miles, internal contacts can become worn, corroded or contaminated by moisture, oil vapour and carbon deposits. This deterioration can lead to poor spark delivery and a range of ignition-related issues.
Replacing a worn distributor cap helps restore optimum ignition performance, ensuring smooth engine operation, improved fuel efficiency and dependable starting in all driving conditions.
What Does a Distributor Cap Do?
The distributor cap sits on top of the distributor assembly and works together with the rotor arm to direct electrical current to each spark plug at precisely the right moment. This ensures the air-fuel mixture within each cylinder ignites correctly, allowing the engine to run smoothly and efficiently.
A healthy distributor cap is vital for:
Reliable engine starting Accurate spark distribution Smooth idle and acceleration Efficient fuel combustion Consistent engine performance Reduced risk of misfiresWhen Should a Distributor Cap Be Replaced?
Distributor caps are considered service items and should be inspected regularly as part of routine ignition system maintenance. Replacement is recommended when signs of wear, cracking, corrosion or carbon tracking are present.
Common symptoms of a failing distributor cap include:
Engine misfires Rough idle Difficult starting Loss of engine performance Hesitation under acceleration Reduced fuel economy Intermittent ignition faults Visible cracks or corrosion inside the capReplacing the distributor cap before complete failure helps prevent ignition problems and can avoid further wear to other ignition components such as spark plugs, ignition leads and ignition coils.
Features & Benefits
Suitable for selected Porsche 928, Porsche 924S and Porsche 944 models Ensures correct spark distribution to all cylinders Supports reliable ignition timing Helps reduce misfires and ignition faults Durable construction for long service life Ideal for preventative maintenance and restoration projects Direct replacement for worn or damaged original componentsMaintain the reliability and performance of your Porsche ignition system with Distributor Cap 94460225100/2 from Design911.
Porsche Distributor Caps & Ignition Components
Porsche Ignition Parts for Reliable Performance
Discover a comprehensive range of Porsche distributor caps, rotor arms, ignition leads, spark plugs and ignition system components at Design911. Whether you're maintaining a classic Porsche 924S, restoring a Porsche 944 or servicing a Porsche 928, our selection of ignition parts helps ensure reliable starting, smooth running and optimum engine performance.
The ignition system is one of the most important aspects of engine operation. Components such as distributor caps and rotors are responsible for directing electrical current to the correct cylinders, allowing the engine to fire efficiently and consistently. As these parts age, wear and contamination can reduce ignition performance, leading to misfires, hesitation and reduced fuel economy.
Regular replacement of ignition service components helps maintain engine reliability and prevents costly faults from developing.
Why Replace Porsche Distributor Caps?
Distributor caps are exposed to constant electrical activity, heat and vibration. Over time, internal contacts wear down and can develop carbon tracking or corrosion that interferes with spark delivery.
Benefits of replacing a worn distributor cap include:
Improved starting performance Smoother idle quality Reduced engine misfires Better throttle response Improved fuel efficiency Enhanced reliability for classic Porsche modelsRelated reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94460225100
The product you are viewing cross references to these numbers
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 928S2 4.7L 1984-86
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Fits:
Porsche 924S 1986-88
Porsche 944 2.5L 1982-87
Porsche 944 2.7L 1989
Porsche 944 TURBO S 2.5L 1987-88
Porsche 944 TURBO 2.5L 1989-91
Click 'Zoom in' for large parts diagram.
Diagram ref no 28
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94460225700
The product you are viewing cross references to these numbers
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
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12 Month Warranty
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