Distributor Cap

Distributor cap sleeve.

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Related, superseded, cross reference or alternative numbers for comparison.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

OE Match distributor cap for the supplied 928S application. It connects the distributor rotor with the ignition leads as part of the spark distribution system.

Fits

• Porsche 928 (1978-1995)=>928S 4.7L 1981-83
  
  Check fitment for your specific vehicle (model, year, engine) before ordering.

What This Product Does

Working alongside the rotor, the cap routes high-voltage electricity towards the appropriate spark plug lead. Its insulating housing separates the electrical paths and covers the internal contacts. Damage to the housing or deterioration around the terminals can allow electricity to take an unintended path.

Functions

• Provides connection points for the ignition leads.
• Passes ignition voltage from the rotor towards the spark plugs.
• Separates the high-voltage paths within the distributor assembly.
• Shields the enclosed contacts from external contamination.
  
  

Technical Details

• Brand: OE Match.
• Component: ignition distributor cap.
• Supplied reference: 92860290200.
• Listed 928S engine specification: 4.7L.
  
  

Symptoms of Fault

• Misfiring that becomes more noticeable in damp weather.
• Uneven idling or hesitation when accelerating.
• Starting difficulty or occasional failure to start.
• Fine cracks around the lead connections.
• Dark tracking lines or evidence of electrical arcing inside.
• Oxidised, corroded or visibly eroded contacts.
  
  

Why Replacement Matters

A cracked housing, damaged insulation or deteriorated contacts can interrupt the intended ignition path. Renewal addresses cap-related faults once inspection has established the cause. Check the rotor, lead condition and connections during diagnosis: similar running problems can originate elsewhere, so symptoms alone do not confirm that the cap requires replacement.

FAQs

Does an intact exterior rule out failure?
No. Internal tracking or insulation deterioration may be present even when the outside appears undamaged.

Why can damp conditions make misfiring worse?
Moisture on contaminated insulating surfaces can make unintended electrical discharge more likely.

Should the rotor also be inspected?
Yes. Examine both components for wear and damage rather than assuming that only the cap needs attention.

Can cleaning resolve the problem?
Removing contamination may offer temporary improvement, but cleaning does not repair cracked insulation or established tracking damage.

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

92860290200

The product you are viewing cross references to these numbers

Distributor cap

Fits:
Porsche 924 1976-80
Porsche 912E

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

113905207C

The product you are viewing cross references to these numbers

Distributor cap.

Fits:
Porsche 924 1976-80
Porsche 912E

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

113905207C

The product you are viewing cross references to these numbers

Distributor cap.
This cap forms the upper section of the distributor assembly, routing high-voltage current from the ignition coil to each spark plug wire in the correct firing order.

Fits:
Porsche 924 1976 - 1980
Porsche 912E

Over time, original caps can crack, carbon-track, corrode at the terminals, or develop moisture ingress - all of which reduce ignition performance. Installing a fresh  cap restores clean, strong spark delivery and stable engine operation.

A deteriorated or damaged distributor cap can cause:
• Misfires, hesitation, or rough running
• Hard starting, especially in damp weather
•  Weak or inconsistent spark delivery
•  Poor fuel efficiency or lack of power
Replacing the cap is a simple, effective way to restore ignition reliability and smooth engine performance.

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

113905207C

The product you are viewing cross references to these numbers

Distributor cap.

Fits:
Porsche 928 1983-86
Porsche 924S 1986-88
Porsche 944 2.5/2.7L 1981-88
Porsche 944 M44.11
Porsche 944 M44.12 M249 Auto
Porsche 944 M44.52 Turbo

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

94460225100

The product you are viewing cross references to these numbers

Distributor cap.

Fits:
Porsche 928 1983-86
Porsche 924S 1986-88
Porsche 944 2.5/2.7L 1981-88
Porsche 944 M44.11
Porsche 944 M44.12 M249 Auto
Porsche 944 M44.52 Turbo

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

94460225100

The product you are viewing cross references to these numbers

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 misfires

When 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 cap

Replacing 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 components

Maintain 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 models       

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

94460225100

The product you are viewing cross references to these numbers

Distributor cap.

Fits:
Porsche 928S 09/1982 - 07/1983

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

92860290200

The product you are viewing cross references to these numbers

Bosch Distributor cap
High-quality Bosch distributor cap for the Porsche 928S 4.7L, designed as a direct replacement for Porsche OE reference 92860290200. The Bosch 0290004502 distributor cap is an essential component of the Porsche 928S ignition system, distributing the high-voltage current generated by the ignition coil to each spark plug in the correct firing sequence.

Fits:
Porsche 928S 09/1982 - 07/1983
 * Engine codes: M28.11 M28.12

Always confirm the Porsche OE reference and existing ignition system before ordering, particularly on vehicles where the distributor may have been replaced during previous repairs.

A distributor cap operates continuously under high electrical voltage, engine-bay heat and vibration. As the internal contacts wear or become contaminated, ignition performance can deteriorate, potentially causing difficult starting, misfires, rough running or reduced engine performance.

Replacing a worn distributor cap with the correct Bosch component helps restore reliable spark distribution and maintain smooth operation of the 4.7-litre V8 engine.

Key Features

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

92860290200

The product you are viewing cross references to these numbers