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Relays / Fuses
By OE Match
- 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 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
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
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90161510600
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)
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
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90161510400
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1975-1977 3.0L Turbo (930)
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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91161814900
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
This kit containers the wires located on the engine relay panel equipped with the Bosch or Beru resistors.
Fits:
Porsche 911 1965-68
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90160905305
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
- 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 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- 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
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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92861811303
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 944 2.5L 8V 1982-87
- Porsche 928S2 4.7L 1984-86
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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92861852100
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356B 1959-63
- Porsche 356C 1963-65
Fits:
Porsche 356 B/C M/CARRERA 2000GT 1960-65
Porsche 911 >>1968
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
64461334211
The product you are viewing cross references to these numbers
OEMatch Relays / Fuses — Fit, Function, Confidence
Relays and fuses protect and manage electrical circuits across Porsche models. OEMatch supplies relays and fuses selected for Porsche applications, with a wide catalogue including over 4,000 part numbers and 8,700 OE cross-references to support correct replacement and repair.
Available Types
- Blade fuses for low-current circuits.
- Cartridge and high-current fuses for power circuits.
- Micro fuses and fuse links used in compact fuse boxes.
- Power relays, micro relays and multi-pin relay modules for switching higher loads.
Understanding OEMatch Relays / Fuses
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original relays and fuses. OE (Original Equipment) refers to parts matching original specifications for the relays and fuses and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM relays and fuses engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Fuses act as the first line of defence by breaking the circuit when current exceeds safe levels, protecting wiring and modules. Relays use a low-current control signal to switch higher-current loads, allowing devices such as headlights, fuel pumps and cooling fans to run without overloading switches or control units.
Benefits Include
- Restored operation of electrical systems and accessories.
- Protection for wiring and expensive electronic modules.
- Reduced risk of fault-related damage and related downtime.
Why Relays / Fuses Wear and Fail
- Overcurrent or short circuits that blow fuses.
- Corrosion or moisture ingress causing poor connections.
- Worn or pitted relay contacts leading to intermittent operation.
- Vibration or mechanical stress loosening terminals and sockets.
The Importance of Replacing with OEMatch Relays / Fuses
Timely replacement maintains electrical integrity, prevents cascading failures and helps ensure systems perform as intended on Porsche models. Choosing parts selected for Porsche applications reduces the risk of incorrect ratings or poor fitment.
Advantages
- Precise fit and correct mounting for existing fuse boxes and relay sockets.
- Ratings and contact arrangements matched to typical Porsche circuits.
- Coverage for common Porsche models to aid straightforward replacement.
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Fuel Pumps
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Brake Light Switch
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Brake & Clutch Switch
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Hazard Warning Switch
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Handbrake Switch
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Reverse Light Switch
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Headlamp Switch
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Window Switch
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Window Motors
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Window Mechanism
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Wiper Motor
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Wiper Mechanism
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Electric Horn
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Ignition Switch
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Seat Switch
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Indicator / Wiper Stalk Switch
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Roof / Sun Roof Switch
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Washer pumps / bottles / jets
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Alarms / Security / Central Locking
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Electronic Control Units
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Dashboard / Console Parts & Switches
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Bonnet / Rear Lid / Spoiler Activators & Motors
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Connector housing
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Wiring harness
