Drive belt. Porsche 958 Cayenne V6  ❭  95810225120

Air Pump Belt - 9.5 x 975.



Fits:
Porsche 911 3.2L 1978-89

Click 'Zoom in' for large parts diagram.
Diagram Ref No 35.

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Related, superseded, cross reference or alternative numbers for comparison.

90019200550

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Alternator Belt, Narrow V-belt.
Belt size: 10 x 710



Fits:
Porsche 911 1965-73
Porsche 911 Turbo 1976 >>
Porsche 911 SC 1974-79 (Check Size of your Belt)
Porsche 911 SC 1980-83
Porsche 911 3.2L 1984-89
Porsche 914 1970-76

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Related, superseded, cross reference or alternative numbers for comparison.

9991921765A

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Alternator belt, Belt size: 9.5 x 725.
The Genuine Porsche 99919209750 alternator belt is an OE V-belt for selected Porsche 911 1974–1979 models. It drives the alternator and cooling fan, helping maintain battery charging and essential air-cooled engine cooling. Ideal for routine servicing or replacing a cracked, slipping, noisy or worn original belt.

Fits:
Porsche 911 Turbo/SC 1974 - 1979 (Please choose by size)

Diagram ref no 12

This belt is used on selected classic Porsche 911 models and fits the alternator / cooling fan pulley system.

What This Part Does / Functions
•  Drives the alternator from the engine pulley system
•  Helps keep the battery charged while the engine is running
•  Drives the engine cooling fan on air-cooled Porsche 911 models
•  Supports correct engine cooling airflow
•  Helps maintain stable electrical system performance
•  Provides correct OE Porsche belt fitment for the listed pulley setup
•  Replaces a worn, cracked, stretched, glazed or noisy belt
•  Helps prevent belt slip, squeal and charging/cooling issues.

Why Replace This Part?
The alternator belt is a critical service item on air-cooled Porsche 911 models because it drives both the alternator and the cooling fan. Over time, the belt can crack, glaze, stretch, fray or lose grip on the pulleys. A worn or slipping belt can cause charging problems and may reduce cooling fan speed, which can lead to engine temperature concerns. Replacing the belt with a Genuine Porsche OE alternator belt helps restore correct belt drive, reliable battery charging and proper cooling fan operation.

When to Replace This Part
•   If the belt is cracked, glazed, frayed or visibly worn
•   If the belt squeals or slips during engine operation
•   If the battery or charging warning light appears
•   If the belt tension can no longer be set correctly
•   During scheduled service or preventative maintenance
•   When replacing alternator, fan pulley, shims or related belt-drive hardware
•   If the belt has been contaminated by oil, fuel or debris
•   When recommissioning a stored classic Porsche 911.

Where It Fits on the Car
This belt fits on the rear engine alternator / cooling fan pulley system. It runs between the crankshaft pulley and the fan/alternator pulley assembly, driving the alternator and cooling fan.

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

99919209750

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