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- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Ignition Coil Ground Strap Set – Left & Right Earth Cables
High-quality ignition coil ground strap set designed for Porsche 928 S2 and 928 S4 models from 1985 onwards.
This set includes both left (driver’s side) and right
(passenger side) ground cables, providing the essential electrical connection
between the ignition coils and the cylinder heads. These earth straps ensure
proper grounding of the ignition system, supporting consistent spark
performance and reliable engine operation.
Fits:
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Diagram ref no 27 and 28
Manufactured using durable, high-conductivity materials with robust insulation and terminals, these cables are designed to withstand engine bay heat, vibration, and long-term use while maintaining optimal electrical performance.
A direct replacement set, these ignition coil ground straps are critical for maintaining ignition system reliability and preventing electrical faults.
Key Features
• Complete set of left and right ignition coil ground straps
• Suitable for Porsche 928S (from 1985 onwards)
• Provides secure grounding between ignition coils and cylinder head
• High-conductivity cable construction for reliable performance
• Durable insulation for engine bay conditions
• OEM-style fit and function
Function and Purpose
These ground straps provide the critical electrical grounding path for the ignition coils.
They help to:
• Ensure stable and consistent ignition performance
• Prevent electrical resistance or grounding faults
• Support proper spark generation
• Maintain reliable engine operation
Why Replace Your Ignition Coil Ground Straps
Over time, ground cables can degrade due to heat, corrosion, and vibration.
Common issues include:
• Corroded or oxidised terminals
• Frayed or damaged cables
• Increased electrical resistance
• Poor grounding leading to ignition issues
Replacing the ground straps restores proper electrical flow and helps prevent ignition system faults.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92861281
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- 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 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- 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 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 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
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
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- 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 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 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- 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 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
Fits:
Porsche 911 1984-89 (not Turbo)
Porsche 924S 1986-88
Porsche 944 1982-91
Porsche 964 C2 / C4 1989-94
Porsche 964 Carrera RS 1992
Porsche 964 C2 Tiptronic 1990-94
Porsche 968 1992-95
Click "Zoom In" for large parts diagram.
Diagram ref no 2.
Related reference numbers
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94460280100
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- 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 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
- Porsche 914 (1970-1976)
Fits:
Porsche 911 1969 - 1989
Porsche 914/6 1970 - 1972
Porsche 930 1976 - 1989
Porsche 964 C2/C4 1989 - 1994
Porsche 944
Porsche 928
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PCG602502A
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