Porsche part number 91161510801 (also formatted as 911-615-108-01) is a round, 5-pin multi-purpose and fuel pump relay. It fits classic air-cooled Porsche models manufactured between 1965 and 1989, though some suppliers list applications extending through 1998. This RED relay contains an internal suppression diode that prevents harmful voltage spikes from feeding back into sensitive electronics when the relay coil de-energizes. Do NOT replace it with the standard BLACK one. Wehrle brand (OEM), made in Germany. I think the new factory Porsche ones say "made in China" on the part. (9g)
- Primary Function. Commonly serves as the fuel pump relay on CIS (K-Jetronic) fuel-injected 911 and 930 models, cutting fuel delivery if the engine stalls.
- Starter and Control Units. Used in ignition, starter, and electronic control unit circuits on select air-cooled models.
- Auxiliary Accessories. Functions as a multi-purpose switch for high-draw accessories such as the air conditioning system, horn, fog lights, or rear window defroster
- Physical Specs. Round housing with a standard 5-pin configuration, typically colored red or brown.
- Supersessions. Replaces the earlier discontinued part number 91161510800 and cross-references with 91161510802
- Porsche 911. Fits 1965–1989 models across Coupe, Targa, Cabriolet, and Speedster trims (some catalogs extend compatibility up to 1998).
- Porsche 912 and 912E. Fits 1976 models equipped with the 2.0L H4 engine.
- Porsche 914. Fits 1970–1976 models across all 1.7L, 1.8L, and 2.0L engine variants.
- Porsche 930 (911 Turbo). Fits 1978–1979 models (and select other turbo years) with the 3.3L H6 engine.
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