Fuel pump relay red. Porsche 911 1975-89

Fuel pump relay red.
The red fuel pump relay is an replacement designed to control and protect the fuel pump circuit on classic Porsche 911 models from 1975–89. Built to the same electrical specifications as the original red relay (previously 91161510801), it ensures reliable activation of the fuel pump, stabilises current delivery, and prevents pump operation under unsafe conditions.

Fits:
Porsche 911 1975 - 1989
Porsche 911 Turbo 3.0/3.3L 1975 - 1989

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

This red fuel pump relay:
• Controls power supply to the fuel pump, ensuring it only runs when the engine is operating or cranking
• Provides essential electrical protection by preventing voltage spikes and reducing load on ignition components
• Ensures stable fuel delivery for smooth starting, reliable idle and consistent engine operation
• Replaces weak, intermittent or failed original relays that can cause no-start symptoms, stalling or fuel-pressure loss.

A failing red fuel pump relay can cause:
• Intermittent or complete no-start conditions
• Engine stalling, especially when warm Loss of fuel pressure leading to hesitation or uneven running
• Electrical overheating or relay chatter Fuel pump running continuously - a significant safety risk
Replacing the relay restores reliable fuel delivery and ensures the fuel pump operates exactly as Porsche intended.

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Related, superseded, cross reference or alternative numbers for comparison.

91161510802

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