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Alternator belt. Porsche 911 / 914 - 9991921765A
9991921765A/1
Vehicle Group
- 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)
Information
Alternator belt, Narrow V-belt.
Belt size: 10 x 713 mm
The V-belt runs between the crankshaft pulley and the alternator/fan pulley. It’s the primary mechanical link that spins the alternator to charge the battery and, on air-cooled 911s and 914-6 models, turns the engine cooling fan.
Fits:
Porsche 911 1965 - 1973
Porsche 911 Turbo 1976 >>
Porsche 911 SC 1974 - 1979 (Check Size of your Belt)
Porsche 911 SC 1980 - 1983
Porsche 911 3.2L 1984 - 1989
Porsche 914 1970 - 1976
Please note: Always confirm against the belt size currently fitted and pulley setup before ordering.
Why Replacement Matters - With age and mileage, belts:
• Crack, glaze, or harden, reducing grip
• Stretch, making correct tension impossible
• Begin to slip, causing charging issues and, on air-cooled engines, reduced cooling fan speed
A slipping or failing belt can lead to battery discharge, warning lights, overheating, or being stranded. Fitting a fresh belt restores reliable alternator and fan drive, protecting both the engine and electrical system.
When to Replace - Consider replacing the alternator belt if:
• You see cracks, fraying, glazing, or missing chunks in the belt rubber
• The belt squeals on startup or under load
• The belt has stretched and can’t be tensioned correctly
• You’re doing routine service on a classic 911 / 914-6 or preparing for a long trip
• The car is undergoing engine-out work or restoration
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9991921765A
The product you are viewing cross references to these numbers
Belt size: 10 x 713 mm
The V-belt runs between the crankshaft pulley and the alternator/fan pulley. It’s the primary mechanical link that spins the alternator to charge the battery and, on air-cooled 911s and 914-6 models, turns the engine cooling fan.
Fits:
Porsche 911 1965 - 1973
Porsche 911 Turbo 1976 >>
Porsche 911 SC 1974 - 1979 (Check Size of your Belt)
Porsche 911 SC 1980 - 1983
Porsche 911 3.2L 1984 - 1989
Porsche 914 1970 - 1976
Please note: Always confirm against the belt size currently fitted and pulley setup before ordering.
Why Replacement Matters - With age and mileage, belts:
• Crack, glaze, or harden, reducing grip
• Stretch, making correct tension impossible
• Begin to slip, causing charging issues and, on air-cooled engines, reduced cooling fan speed
A slipping or failing belt can lead to battery discharge, warning lights, overheating, or being stranded. Fitting a fresh belt restores reliable alternator and fan drive, protecting both the engine and electrical system.
When to Replace - Consider replacing the alternator belt if:
• You see cracks, fraying, glazing, or missing chunks in the belt rubber
• The belt squeals on startup or under load
• The belt has stretched and can’t be tensioned correctly
• You’re doing routine service on a classic 911 / 914-6 or preparing for a long trip
• The car is undergoing engine-out work or restoration
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9991921765A
99919217650
9991921765A
520100715
The product you are viewing cross references to these numbers
€9.31
Now €8.38
In stock
Related products
Vehicle Group
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 Turbo 2.5L 8V 1985-88
Information
Snap a timing belt on this type of motor and the valves stop opening and closing, but those pistons keep slamming up and down. Bent valves, broken lifters, even a broken camshaft could be the outcome! Keep the relationship between your pistons and valves civil by performing proper timing and balance shaft belt maintenance.
This kit includes:
- Camshaft Belt
- Balance shaft belt
- Camshaft tensioner roller
- Timing belt tensioner roller
- Balance shaft idler roller
- Camshaft idler roller
Fits:
Porsche 924/944 2.5L
Porsche 944 TURBO 2.5 >1986
WITHOUT AUTO ADJUSTER
Early cars (83-86) that have been updated to the later style waterpump with belt guard rail will not use this kit, please order parts individualy.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
BELTKIT01
The product you are viewing cross references to these numbers
This kit includes:
- Camshaft Belt
- Balance shaft belt
- Camshaft tensioner roller
- Timing belt tensioner roller
- Balance shaft idler roller
- Camshaft idler roller
Fits:
Porsche 924/944 2.5L
Porsche 944 TURBO 2.5 >1986
WITHOUT AUTO ADJUSTER
Early cars (83-86) that have been updated to the later style waterpump with belt guard rail will not use this kit, please order parts individualy.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
BELTKIT01
94410515704
94410221904
94410502704
94410527302
94410227706
94410202507
The product you are viewing cross references to these numbers
About kit
This kit is comprised of the following items:
1 x Balance shaft belt. Porsche 924S / 944 / 968 (94410221904/1
1 x Cam belt tensioner. Porsche 924S / 944 (94410502704/2
1 x Cam idler roller. Porsche 924S / 944 (94410527302/1
1 x Balance belt idler roller. Porsche 924S / 944 / 968 (94410227706/2
1 x Balance belt tensioner gear. Porsche 924S / 944 / 968 (94410202507/2
1 x Timing camshaft belt (cam belt). Porsche 924S / 944 (94410515704/1
€257.74
Now €231.95
In stock
Vehicle Group
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
Information
Timing camshaft belt (cam belt).
Fits:
Porsche 924S 1986-88
Porsche 944 1982-91 (V8)
Porsche 944 Turbo
Diagram Ref No 5.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94410515704
The product you are viewing cross references to these numbers
Fits:
Porsche 924S 1986-88
Porsche 944 1982-91 (V8)
Porsche 944 Turbo
Diagram Ref No 5.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94410515704
94410515704
The product you are viewing cross references to these numbers
€31.80
Now €28.62
In stock
Vehicle Group
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
Information
Balance shaft belt.
Fits:
Porsche 924S 1986-88
Porsche 944 1982-91 all models
Porsche 968 1992-95 all models
Click 'Zoom in' for large parts diagram.
Diagram Ref No 14.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94410221904
The product you are viewing cross references to these numbers
Fits:
Porsche 924S 1986-88
Porsche 944 1982-91 all models
Porsche 968 1992-95 all models
Click 'Zoom in' for large parts diagram.
Diagram Ref No 14.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94410221904
94410221904
The product you are viewing cross references to these numbers
€161.13
Now €145.02
In stock