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- Porsche 957 Cayenne 3.0L Diesel 2007-10
- Porsche 958 Cayenne V6 3.0L Diesel (245Hp) 2010-17
Fits:
Porsche 92A Cayenne (958) 3.0L V6 Diesel 2011>>2018
Porsche 9PA1 Cayenne (957) 3.0L V6 Diesel 2007>>2010
Diagram Ref No 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95510221900
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)
- 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)
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Related, superseded, cross reference or alternative numbers for comparison.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
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
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
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)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
Fits:
Porsche 911 1969-73
Porsche 911SC 1974-83
Porsche 911 Turbo 1975-77
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90019202750
The product you are viewing cross references to these numbers
- 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)
Shim washer for alternator belt pulley 0.5mm for Porsche 911 models, used to fine-tune alternator belt alignment and tension across classic 911 applications from 1965–1989.
What This Product Does
This 0.5mm shim washer sits between the alternator belt pulley halves to adjust pulley spacing, helping to achieve correct belt tension and alignment. Using the appropriate number of shims supports smooth belt operation and reduces the risk of premature belt wear.
Functions
- Spaces the alternator pulley halves to achieve correct belt tension
- Helps align the alternator belt with adjacent pulleys
- Allows fine tolerance adjustment in 0.5mm steps
- Contributes to stable alternator and cooling fan drive
Symptoms of Fault
- Squealing or chirping from the alternator belt area on start-up or under load
- Visible belt slack or difficulty setting correct belt tension
- Uneven belt wear or fraying at the pulley edges
- Traces of belt dust around the alternator and pulley
- Intermittent charging issues linked to belt slip
- Overheating risk on engines where the belt also drives the cooling fan
Why Replacement Matters
Alternator and fan belt systems on classic Porsche 911 models rely on a stack of correctly sized shims to set belt tension within specified tolerances. Missing, damaged, or incorrect shims can make precise adjustment difficult, leading to belt slip, noise, and accelerated wear. Replacing worn or lost shim washers when servicing the belt or pulleys helps restore proper alignment and tension control, supporting reliable charging and cooling operation on older 911 engines.
Fits
- Porsche 911 & 912 (1965–1989)
- Porsche 911 1974–1977 2.7L / 1976–1977 3.0 Carrera
- Porsche 911 1975–1977 3.0L Turbo (930)
- Porsche 911 1978–1983 3.0L SC
- Porsche 911 1984–1986 3.2L
- Porsche 911 1987–1989 3.2L G50
FAQs
- Q: How many shims should be used?
A: Follow the Porsche workshop manual for your specific model. The total number of shims is usually fixed, with the split between in-use and parked shims determining belt tension. - Q: Where are the spare shims stored?
A: Typically, unused shims are kept under the pulley nut or outer pulley half so they remain available for future adjustment. - Q: When should shims be renewed?
A: Replace shims that are bent, corroded, damaged, or missing when changing the alternator belt or pulley components, to ensure accurate tolerance adjustment.
Support & Advice
Ensure you use the correct combination of shims to bring the belt tension within the recommended tolerances for your engine. Always confirm fitment against your vehicle details (model, year, engine) before installation.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9301065640Y
The product you are viewing cross references to these numbers