Complete ignition harness for a 3 pin CD1/HK2 box. Porsche 911 1965-73 / 914  ❭  91161205000

Ignition Coil

The Ignition Coil is a vital component of the ignition system fitted to classic Porsche 911 2.0L models (1965-1968), Porsche 912 SWB models and Porsche 356B and 356C vehicles. Designed to transform the vehicle's low-voltage battery power into the high-voltage electrical energy required to ignite the air-fuel mixture within the engine cylinders, the ignition coil plays a critical role in engine starting, performance and reliability.

Fits:
Porsche 356 Carrera (Twin cam)
Porsche 911S >>1968
Porsche 911L >>1968 

Without a properly functioning ignition coil, the spark plugs cannot generate a sufficiently strong spark to ignite the fuel mixture efficiently. This can result in poor starting, rough running, engine misfires and reduced performance.

For owners maintaining or restoring classic Porsche vehicles, replacing a worn or failing ignition coil is an important part of preserving dependable operation and ensuring the ignition system performs as intended.

What Does an Ignition Coil Do?

The ignition coil acts as a high-voltage transformer within the ignition system. It converts the 12-volt electrical supply from the battery into the thousands of volts needed by the spark plugs to create combustion inside the engine.

Each time the ignition system signals for a spark, the coil generates a high-voltage pulse which is transferred through the distributor and ignition leads to the correct spark plug. This process occurs continuously while the engine is running and is essential for smooth engine operation.

A healthy ignition coil helps provide:

Reliable engine starting Consistent spark energy Smooth idle quality Improved combustion efficiency Strong acceleration response Reliable engine performance

When Should an Ignition Coil Be Replaced?

Ignition coils can deteriorate over time due to age, heat cycles, vibration and internal insulation breakdown. Classic vehicles are particularly susceptible because many original ignition components may have been in service for decades.

Common symptoms of a failing ignition coil include:

Hard starting or non-start conditions Engine misfires Rough idle Hesitation during acceleration Loss of power Intermittent stalling Poor fuel economy Weak or inconsistent spark output

Replacing a failing ignition coil helps restore ignition performance and can prevent further stress on other ignition components such as distributor caps, rotors, spark plugs and ignition leads.

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

90160210201

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Ignition coil.

Fits:
Porsche 911 2.0L S / L / T 12V 1968-72
Porsche 911 1969-83 / 911 SC
Porsche 930 Turbo 3.0L 1975-77
Porsche 930 Turbo 3.3L 1986-89

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

PCG602502A

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Ignition coil 14v. Porsche 911 84-89 / 924S / 944 / 964 / 968 / 928 (Bosch ref: 0221118322)
The OE Match (Bosch style) ignition coil (Bosch MPN 0221118322, Porsche OEM 944.602.115.00 / 944.602.115.01) sold as the direct replacement coil, It’s the high-voltage transformer that converts 12–14 V battery energy into the high voltage a spark plug needs to ignite the air/fuel mix. Please note the Bosch product is no longer available so this is one of the only alternatives. 

Fits:
Porsche 911 1984 - 1989 (not Turbo)
Porsche 924S 1986 - 1988
Porsche 944 1982 - 1991
Porsche 964 C2 / C4 1989 - 1994
Porsche 968 1992 - 1995
Porsche 928 Cars Up to 1988 *2 Ignition Coils Per Car


Replace the coil when any of the following apply:

• Out-of-spec resistance on primary or secondary (measured with DVM). If primary > ~1 Ω or secondary well outside the 5–9 kΩ region.

•  Intermittent misfire(s), rough idle, loss of power, or poor fuel economy that follow coil diagnostics. Ignition coils degrade and can produce weak/inconsistent sparks before total failure.

•  Check Engine Light with misfire codes (P0300–P030x) that point to a particular cylinder and a coil swap test proves the coil is at fault.

•  Visible damage (cracked housing, carbon tracking/arcing, oil contamination of electrical terminals, corroded connectors). These are signs of imminent failure or arcing that can damage plugs/caps.

•   Age / preventive maintenance: rubber seals, insulation and internal windings deteriorate with heat and time; on older cars it’s common to replace coils as part of ignition refresh. 

Common failure modes / symptoms
•   Cylinder misfires / rough running (single cylinder or random).
•   Hard starts or no-start if coil output falls below what’s needed to light the plug.
•   Check Engine Light with misfire codes (P0300, P0301… etc).
•   Intermittent stalling or power loss under load (coil heating causes intermittent fault).
•   Arcing / carbon tracking visible on coil body or cap — can cause cross-firing or misfires.
•   Failed connectors / harness corrosion causing poor coil drive — sometimes harness/connectors are the root cause rather than the coil itself. 

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

94460211501

The product you are viewing cross references to these numbers