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Fuel Pumps
By OE Match
- Porsche 924 2.0L 1976-79
This relay sits between the ignition switch / DME and the fuel pump electrical circuit — its role is to switch the 12 V supply to the pump when the engine is running (or ignition is on), ensuring consistent and reliable fuel delivery. Activation of this relay is essential for proper fuel-pump operation and stable fuel pressure throughout the engine’s runtime.
Fits:
Porsche 924 1976 - 1978
* Please check and match the part number of your relay in your car before ordering.
A fuel-pump relay can degrade over time due to heat, vibration and internal electrical wear. When the relay begins to fail, the fuel pump may not receive power consistently, leading to hard starting, stalling or complete no-start conditions. Replacing an aging or faulty relay ensures stable fuel delivery, protects the wiring system and maintains reliable engine performance.
Reasons to Replace:
• Fuel pump does not activate even though the engine cranks
• Intermittent fuel pump operation or unstable fuel pressure
• Relay becomes hot, buzzes or produces electrical smell
• During wiring repair, harness work or full vehicle restoration
• The relay is decades old and may fail without warning (preventative maintenance).
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
477906059
The product you are viewing cross references to these numbers
OEMatch Fuel Pumps — Fit, Function, Confidence
OEMatch fuel pumps for Porsche models are selected to support application-specific needs and to provide reliable fuel delivery across a wide range of engines. The range covers tank-mounted units, high-pressure pumps for turbocharged engines, and period-correct mechanical pumps for classic models.
Understanding OEMatch Fuel Pumps
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original fuel pumps. OE (Original Equipment) refers to parts matching original specifications for the fuel pumps and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM fuel pumps engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
A fuel pump draws fuel from the tank and delivers it to the engine at the pressures required by the fuel system. Modern Porsche vehicles often use electronically controlled in-tank pumps and separate high-pressure units on forced-induction engines, while older cars may use mechanical pumps. Correct pressure and steady flow are important for combustion consistency and throttle response.
Benefits Include
- Consistent fuel pressure for stable combustion and predictable throttle response.
- Compatibility with factory mounting, connectors and sensors to simplify installation.
- Options suitable for classic restorations, routine maintenance and performance upgrades.
Why Fuel Pumps Wear and Fail
- Contaminated or degraded fuel causing internal wear and blockages.
- Overheating or prolonged operation outside the fuel tank leading to premature failure.
- Electrical faults such as relay failure, connector corrosion or wiring damage.
The Importance of Replacing with OEMatch Fuel Pumps
A failing fuel pump can cause stalling, rough running or starting problems and may affect engine longevity if not addressed. Replacing a worn pump restores stable pressure and delivery, helping to maintain drivability, reduce the risk of misfires and prevent secondary damage that can arise from intermittent fuel supply.
Advantages
- Direct-fit replacements engineered to match original dimensions and tolerances.
- Available in tank-mounted, high-pressure and mechanical types to suit the model and application.
- Compatible fittings, relays and housings to support reliable installation.
Support & Advice
Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new fasteners where specified. Recheck fasteners after initial mileage.
