Relays / Fuses

Relay W-595A Yellow hazard warning and fog lamps

Fits:
Porsche 911 - 1965 to 1973
Porsche 912 - 1965 to 1969

Also known as W-595A, this yellow relay is used for the hazard warning and fog lamps The relay package is designed with modern ISO 30A Panasonic relays and transient voltage suppression to eliminate voltage spikes. This will result in prolonged longevity of the relay contacts and coil.

• Cover is made from a robust PA12 (Nylon) that is durable and chemically resistant
• Input voltage: 12v
• Compatible with OE covers

Diagram ref no 14

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90161510600

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Relay W-598A/S Grey headlamp changeover.

Fits:
Porsche 911 - 1965 to 1973
Porsche 912 - 1965 to 1969

Also known as W-595A/S, this grey relay is used for the headlamp changeover and is mounted behind the pedalboard. The relay package is designed with modern ISO 30A Panasonic relays and transient voltage suppression to eliminate voltage spikes. This will result in prolonged longevity of the relay contacts and coil.

• Cover is made from a robust PA12 (Nylon) that is durable and chemically resistant
• Input voltage: 12v
• Compatible with OE covers

Diagram ref no 14

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90161510400

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Wiper Interval Relay 

The OE Match Wiper Interval Relay is a high-quality OEM-style replacement. This relay controls the intermittent wiping function, ensuring your windscreen wipers operate at the correct timed intervals during light rain and changing weather conditions.

Fits:

• Porsche 911 1974-1975 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1975 3.0L Turbo (930)

Diagram ref no 34

Manufactured to match the original specifications, this OE Match relay provides dependable performance, direct-fit installation and reliable operation, making it the ideal replacement for ageing or failed original relays.

What Does the Wiper Interval Relay Do?

The wiper interval relay is an essential component of your Porsche's electrical system. It controls the timing circuit that activates the intermittent wipe feature, allowing the wiper blades to pause between sweeps instead of operating continuously.

By regulating the delay between each wipe cycle, the relay helps maintain clear visibility during drizzle or mist while reducing unnecessary wear on the wiper motor and blades.

The relay is responsible for:

• Controlling intermittent windscreen wiper operation.
• Delivering consistent timed wipe intervals.
• Sending electrical signals to the wiper motor.
• Providing smooth, factory-correct wiper performance.
• Improving visibility and driving safety in variable weather conditions.

Why Do Wiper Interval Relays Fail?

Electrical relays naturally deteriorate over time, particularly in classic vehicles where components may have been in service for decades. Heat, vibration and moisture can all contribute to internal wear and eventual failure.

Common causes include:

• Burnt or worn internal electrical contacts.
• Ageing electronic components.
• Corrosion caused by moisture ingress.
• Heat damage from years of continuous operation.
• Fatigued solder joints and internal circuitry.
• Oxidised terminals leading to poor electrical connections.

Original relays fitted to 1974-1975 Porsche 911 models are now approximately fifty years old, making replacement a sensible preventative maintenance upgrade.

Symptoms of a Faulty Wiper Interval Relay

A failing relay can cause several noticeable problems, including:

• Intermittent wipe function no longer operates.
• Wipers only work on continuous settings.
• Irregular or inconsistent wipe intervals.
• Delayed or erratic wiper activation.
• Wipers stopping unexpectedly during operation.
• Audible relay clicking without correct wiper movement.
• Complete loss of intermittent wipe functionality.

Replacing the relay is often the quickest and most effective way to restore normal operation.

When Should the Relay Be Replaced?

The OE Match Wiper Interval Relay should be replaced whenever intermittent wipe performance becomes unreliable or electrical testing confirms relay failure.

Many Porsche owners also choose to replace ageing relays during restoration projects or preventative maintenance to improve long-term reliability and reduce the risk of electrical faults.

A new relay helps restore dependable operation while preserving the original driving experience of your classic Porsche.

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91161814900

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Relay wiring kit.
This kit containers the wires located on the engine relay panel equipped with the Bosch or Beru resistors.



Fits:
Porsche 911 1965-68

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Intensive windscreen washer relay

Fits:
For cars with option code: M286 - Intensified windscreen washer
Porsche 911 1984-89
Porsche 964 1989-94 - relay location/code no.: R53
Porsche 928 1978-82 - relay location/code no.: XX
Porsche 928 1983-86 - relay location/code no.: XV

Porsche 928 1987-91 - relay location/code no.: IX

* Please check and match the part number of your relay in your car before ordering.

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92861811303

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Intensive windscreen washer relay



Fits:
For cars with option code: M286 - Intensified windscreen washer
Porsche 911 1984-89
Porsche 964 1989-94 - relay location/code no.: R53
Porsche 928 1978-82 - relay location/code no.: XX
Porsche 928 1983-86 - relay location/code no.: XV

Porsche 928 1987-91 - relay location/code no.: IX

* Please check and match the part number of your relay in your car before ordering.

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92861811303

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Safety ceramic fuse 16AMP.



Fits:
Porsche 911 1965-89
Porsche 914 1970-76
Porsche 924 1976-85
Porsche 924S 1986-88
Porsche 944 1982-86
Porsche 928 1978-86

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N0171214

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Safety ceramic fuse 25AMP.



Fits:
Porsche 911 1965-89
Porsche 914 1970-76
Porsche 924 1976-85
Porsche 924S 1986-88
Porsche 944 1982-86
Porsche 928 1978-86

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N0171215

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Safety ceramic fuse 5AMP.



Fits:
Porsche 911 1965-89
Porsche 914 1970-76
Porsche 924 1976-85
Porsche 924S 1986-88
Porsche 944 1982-86
Porsche 928 1978-86

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90017300690

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Safety ceramic fuse 8AMP.



Fits:
Porsche 911 1965-89
Porsche 914 1970-76
Porsche 924 1976-85
Porsche 924S 1986-88
Porsche 944 1982-86
Porsche 928 1978-86

Seat heating relay only for Porsche with seat heating (M139/340)



Fits:
Porsche 911 (1984 to 1989)
Porsche 928 (1985 to 1986)
Porsche 959 (1987 to 1988)
Porsche 944 (1985 to 1988)

* Please check and match the part number of your relay in your car before ordering.

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92861852100

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Seat heating relay only for Porsche with seat heating (M139/340)

Fits:
Porsche 911 (1984 to 1989)
Porsche 928 (1985 to 1986)
Porsche 959 (1987 to 1988)
Porsche 944 (1985 to 1988)

* Please check and match the part number of your relay in your car before ordering.

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92861852100

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Spare bulb and fuse kit (12 Volt).



Fits:
For use on Porsche 911 (1965 to 1971)

The set comprises:
2x high beam/low beam light (H4 55/60W),
2x indicator light (21W),
2x position/licence plate light (4W),
2x tail/brake light (21/5W),
1x reversing light (25W),
2x safety fuse (5A),
2x safety fuse (8A),
2x safety fuse (16A),
2x safety fuse (25A).

The packaging comprises a white Porsche Classic designer metal box with foam inserts.

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PCG91110000

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Spare bulb and fuse kit (12 Volt).



Fits:
For use on Porsche 911 (1972 and 1973)

The set comprises:
2x high beam/low beam light (H4 55/60W),
2x indicator light (21W),
2x position/licence plate light (4W),
2x tail/brake light (21/5W),
1x reversing light (18W),
1x fog light (18W),
2x safety fuse (5A),
2x safety fuse (8A),
2x safety fuse (16A),
2x safety fuse (25A).

The packaging comprises a white Porsche Classic designer metal box with foam inserts.

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PCG91120000

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Spare bulb and fuse kit (12 Volt).



For use on:
Porsche 911 (1974 - 1983)
Porsche 911 Turbo (1975 - 1989)
Porsche 911 Carrera (1984 - 1989)

The set comprises:
2x high beam/low beam light (H4 60/55W),
2x indicator light,
reversing light (21W),
2x position light (4W),
2x tail/brake light (21/5W),
1x licence plate light (5W),
1x fog light (18W),
2x safety fuse (5A),
2x safety fuse (8A),
2x safety fuse (16A),
2x safety fuse (25A).

The packaging comprises a white Porsche Classic designer metal box with foam inserts.

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PCG91130000

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Set of light bulbs and fuses (12 volts), specially put together for model years of the Porsche 911 F with a long wheelbase. The bulbs and fuses are stored in a metal box in Historic Porsche Red, with raised Porsche logo in White and a foam insert inside.



For use on:
Porsche 911 F (1969 - 1973) with a long wheelbase


Contents of the set:

1x high/low beam bulb H4 60/55W
1x high, low beam bulb H1 55W
1x indicator bulb P21W
1x reversing light bulb P18W
1x brake/tail-light bulb P21/5W
1x parking light, number plate light bulb T4W
1x 5A safety fuse
1x 8A safety fuse
1x 16A safety fuse
1x 25A safety fuse

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PCG91120001

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