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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Related, superseded, cross reference or alternative numbers for comparison.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
Price: €9.39
In stock
Related products
Vehicle Group
- Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 992.1 Carrera 2S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 2S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Turbo 3.8L 2020-24
- Porsche 992.1 Turbo S 3.8L 2020-24
- Porsche 992.1 Turbo Cabriolet 3.8L 2020-24
- Porsche 992.1 Turbo S Cabriolet 3.8L 2020-24
Information
Drive belt
The Genuine Porsche 0PB903137B drive belt is an OE V-ribbed / serpentine belt for selected Porsche 991.2 S, 992.1 S, 992 S and 992 Turbo models. This original Porsche V-ribbed / serpentine belt forms part of the engine accessory drive system and helps drive auxiliary components from the engine pulley system.
Fits
Porsche 991.2 S 3.0L 2016 - 2019
* cars with Sports chassis with PASM and PDCC (option code 031)
* cars with Electronic damper control for PASM and PDCC (option code 352)
Porsche 992.1 S up to 14.02.2020 cars with PDCC
Porsche 992 Turbo / Turbo S 2020>> with PDDC (option code 1P7)
Diagram ref no 1
This belt is used on selected Porsche 911 models including 991.2 S, 992.1 S, 992 S and 992 Turbo applications, depending on chassis, suspension and equipment specification.
This part replaces earlier Porsche number: 9A210222100
What This Part Does / Functions
• Transfers drive from the engine pulley system to auxiliary components
• Helps drive the alternator to maintain battery charging
• Supports correct operation of the engine accessory drive system
• Helps maintain reliable auxiliary component performance
• Provides the correct OE Porsche belt length, rib profile and fitment
• Helps prevent belt slip, squeal and accessory-drive faults when fitted correctly
• Replaces a cracked, worn, stretched, glazed or noisy original belt
• Maintains factory Porsche service specification and reliability.
Why Replace This Part?
The drive belt is a normal service wear item. Over time, heat, tension, pulley contact and engine operation can cause the belt to crack, glaze, stretch, fray or lose grip. A worn belt may cause squealing noises, charging faults, accessory-drive issues or warning lights. Replacing it with a Genuine Porsche OE drive belt helps restore correct auxiliary drive operation and supports reliable performance of the belt-driven systems.
When to Replace This Part
• If the belt is cracked, glazed, frayed or visibly worn
• If the belt squeals, slips or makes noise during engine operation
• If the belt has stretched or no longer runs correctly
• During scheduled service or preventative belt replacement
• When replacing the alternator, belt tensioner, idler pulleys or related accessory-drive components
• If the belt has been contaminated by oil, coolant or debris
• If charging or accessory-drive faults are linked to belt slip
• When restoring the engine bay with correct OE Porsche service parts.
Where It Fits on the Car
This belt fits on the engine accessory drive system, routing around the relevant pulleys, idlers and tensioner according to the factory belt layout. It drives auxiliary components as specified by the vehicle’s engine and equipment configuration.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
0PB903137B
The product you are viewing cross references to these numbers
The Genuine Porsche 0PB903137B drive belt is an OE V-ribbed / serpentine belt for selected Porsche 991.2 S, 992.1 S, 992 S and 992 Turbo models. This original Porsche V-ribbed / serpentine belt forms part of the engine accessory drive system and helps drive auxiliary components from the engine pulley system.
Fits
Porsche 991.2 S 3.0L 2016 - 2019
* cars with Sports chassis with PASM and PDCC (option code 031)
* cars with Electronic damper control for PASM and PDCC (option code 352)
Porsche 992.1 S up to 14.02.2020 cars with PDCC
Porsche 992 Turbo / Turbo S 2020>> with PDDC (option code 1P7)
Diagram ref no 1
This belt is used on selected Porsche 911 models including 991.2 S, 992.1 S, 992 S and 992 Turbo applications, depending on chassis, suspension and equipment specification.
This part replaces earlier Porsche number: 9A210222100
What This Part Does / Functions
• Transfers drive from the engine pulley system to auxiliary components
• Helps drive the alternator to maintain battery charging
• Supports correct operation of the engine accessory drive system
• Helps maintain reliable auxiliary component performance
• Provides the correct OE Porsche belt length, rib profile and fitment
• Helps prevent belt slip, squeal and accessory-drive faults when fitted correctly
• Replaces a cracked, worn, stretched, glazed or noisy original belt
• Maintains factory Porsche service specification and reliability.
Why Replace This Part?
The drive belt is a normal service wear item. Over time, heat, tension, pulley contact and engine operation can cause the belt to crack, glaze, stretch, fray or lose grip. A worn belt may cause squealing noises, charging faults, accessory-drive issues or warning lights. Replacing it with a Genuine Porsche OE drive belt helps restore correct auxiliary drive operation and supports reliable performance of the belt-driven systems.
When to Replace This Part
• If the belt is cracked, glazed, frayed or visibly worn
• If the belt squeals, slips or makes noise during engine operation
• If the belt has stretched or no longer runs correctly
• During scheduled service or preventative belt replacement
• When replacing the alternator, belt tensioner, idler pulleys or related accessory-drive components
• If the belt has been contaminated by oil, coolant or debris
• If charging or accessory-drive faults are linked to belt slip
• When restoring the engine bay with correct OE Porsche service parts.
Where It Fits on the Car
This belt fits on the engine accessory drive system, routing around the relevant pulleys, idlers and tensioner according to the factory belt layout. It drives auxiliary components as specified by the vehicle’s engine and equipment configuration.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
0PB903137B
0PB903137B
9A110222100
The product you are viewing cross references to these numbers
Price: €89.47
In stock
Vehicle Group
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
- Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
- Porsche 992.1 Carrera 2S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 2S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Turbo 3.8L 2020-24
- Porsche 992.1 Turbo S 3.8L 2020-24
- Porsche 992.1 Turbo Cabriolet 3.8L 2020-24
- Porsche 992.1 Turbo S Cabriolet 3.8L 2020-24
Information
Drive belt Porsche 992 turbo with PDDC
991.2 For cars with
Option 352 Electronic damper control for PASM and PDCC
031 Electronic damper control for PASM and PDDC
For 992 S with PDDC up to 14.06.2020
Replaces 9A210222200
Fits
Porsche 991.2 S
* with sports suspension (030) PASM (475) and PASM without lowering (477)
Porsche 991 turbo 2014-2020
Porsche 992 Turbo - with standard suspension (1P0)
Porsche 992 Turbo S - with standard suspension (1P0)
Porsche 992.1 S with PDCC up to 14.06.2020
Diagram ref no 1
This Genuine Porsche drive belt is transfers engine drive to auxiliary components, supports correct accessory system operation and is ideal for routine servicing or replacing a cracked, noisy, stretched or worn original belt.
What This Part Does / Functions
• Transfers rotational drive from the engine pulley system
• Drives auxiliary engine components according to the factory belt routing
• Supports correct alternator and accessory system operation
• Helps maintain reliable charging and auxiliary drive performance
• Provides correct OE Porsche belt length, rib profile and fitment
• Helps reduce belt slip, squeal and accessory drive faults when fitted correctly
• Replaces a cracked, worn, stretched, glazed or noisy original belt
• Maintains factory Porsche reliability and service specification.
Why Replace This Part?
The drive belt is a service wear item and is exposed to heat, tension, pulley contact, engine movement and age. Over time, the belt can crack, glaze, stretch, fray or lose grip on the pulleys. A worn belt can cause squealing, slipping, charging issues, accessory-drive faults or complete belt failure. Replacing it with a Genuine Porsche OE drive belt helps restore correct belt-drive operation and supports reliable performance of the engine accessory system.
When to Replace This Part
• If the belt is cracked, glazed, frayed or visibly worn
• If there is belt squeal or slipping on start-up or under load
• If the belt has become stretched or damaged
• During scheduled belt inspection or maintenance
• When replacing the alternator, belt tensioner, idler pulley or related accessory-drive components
• If the belt has been contaminated by oil, coolant or debris
• If there are charging or accessory-drive fault symptoms caused by poor belt drive
• When restoring the engine bay with correct OE Porsche service parts.
Where It Fits on the Car
This belt fits on the engine accessory drive system, running around the relevant pulleys according to the Porsche factory belt routing. It is used to transfer drive from the engine to auxiliary components, depending on model and equipment specification.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
0PB903137H
The product you are viewing cross references to these numbers
991.2 For cars with
Option 352 Electronic damper control for PASM and PDCC
031 Electronic damper control for PASM and PDDC
For 992 S with PDDC up to 14.06.2020
Replaces 9A210222200
Fits
Porsche 991.2 S
* with sports suspension (030) PASM (475) and PASM without lowering (477)
Porsche 991 turbo 2014-2020
Porsche 992 Turbo - with standard suspension (1P0)
Porsche 992 Turbo S - with standard suspension (1P0)
Porsche 992.1 S with PDCC up to 14.06.2020
Diagram ref no 1
This Genuine Porsche drive belt is transfers engine drive to auxiliary components, supports correct accessory system operation and is ideal for routine servicing or replacing a cracked, noisy, stretched or worn original belt.
What This Part Does / Functions
• Transfers rotational drive from the engine pulley system
• Drives auxiliary engine components according to the factory belt routing
• Supports correct alternator and accessory system operation
• Helps maintain reliable charging and auxiliary drive performance
• Provides correct OE Porsche belt length, rib profile and fitment
• Helps reduce belt slip, squeal and accessory drive faults when fitted correctly
• Replaces a cracked, worn, stretched, glazed or noisy original belt
• Maintains factory Porsche reliability and service specification.
Why Replace This Part?
The drive belt is a service wear item and is exposed to heat, tension, pulley contact, engine movement and age. Over time, the belt can crack, glaze, stretch, fray or lose grip on the pulleys. A worn belt can cause squealing, slipping, charging issues, accessory-drive faults or complete belt failure. Replacing it with a Genuine Porsche OE drive belt helps restore correct belt-drive operation and supports reliable performance of the engine accessory system.
When to Replace This Part
• If the belt is cracked, glazed, frayed or visibly worn
• If there is belt squeal or slipping on start-up or under load
• If the belt has become stretched or damaged
• During scheduled belt inspection or maintenance
• When replacing the alternator, belt tensioner, idler pulley or related accessory-drive components
• If the belt has been contaminated by oil, coolant or debris
• If there are charging or accessory-drive fault symptoms caused by poor belt drive
• When restoring the engine bay with correct OE Porsche service parts.
Where It Fits on the Car
This belt fits on the engine accessory drive system, running around the relevant pulleys according to the Porsche factory belt routing. It is used to transfer drive from the engine to auxiliary components, depending on model and equipment specification.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
0PB903137H
9A210222200
0PB903137C
0PB903137H
The product you are viewing cross references to these numbers
Price: €86.67
Orderable
Vehicle Group
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
- Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
- Porsche 992.1 Carrera 2S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 2S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Turbo 3.8L 2020-24
- Porsche 992.1 Turbo S 3.8L 2020-24
- Porsche 992.1 Turbo Cabriolet 3.8L 2020-24
- Porsche 992.1 Turbo S Cabriolet 3.8L 2020-24
Information
Drive belt Porsche 992 turbo with PDDC
991.2 For cars with
Option 352 Electronic damper control for PASM and PDCC
031 Electronic damper control for PASM and PDDC
For 992 S with PDDC up to 14.06.2020
Replaces 9A210222200
Fits:
Porsche 991.2 S
* with sports suspension (030) PASM (475) and PASM without lowering (477)
Porsche 991 turbo 2014-2020
Porsche 992 Turbo - with standard suspension (1P0)
Porsche 992 Turbo S - with standard suspension (1P0)
Porsche 992.1 S with PDCC up to 14.06.2020
Diagram ref no 1
A genuine DAYCO (6PK1775) multi-rib auxiliary drive belt, manufactured as a direct replacement for Porsche part number 9A210222200 / 0PB903137C / 0PB903137H. Transfers engine power to the auxiliary drive system, ensuring reliable operation of engine-driven accessories while maintaining smooth, efficient power transmission and dependable charging system performance.
Key Features & Benefits
• Genuine DAYCO OEM-quality drive belt
• Direct replacement for Porsche 9A210222200, 0PB903137C, 0PB903137H
• High-strength EPDM rubber construction
• Excellent resistance to heat, cracking, and stretching
• Precision multi-rib design for quiet, efficient operation
• Long service life with OEM-quality fitment
• Ideal for scheduled maintenance and belt replacement.
Why Replacing the Drive Belt Matters
The auxiliary drive belt operates continuously whenever the engine is running. As it ages, it can become worn, cracked, or stretched, reducing efficiency and potentially causing charging or accessory drive issues. Replacing the belt at the recommended service interval helps maintain reliable engine operation and reduces the risk of unexpected breakdowns.
When to Replace the Drive Belt
• Visible cracks, fraying, or glazing
• Squealing or chirping noises from the engine bay
• Signs of belt stretching or rib wear
• During major engine or accessory drive servicing
• If the belt has been contaminated by oil or coolant
• At the manufacturer's recommended service interval
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
0PB903137H
The product you are viewing cross references to these numbers
991.2 For cars with
Option 352 Electronic damper control for PASM and PDCC
031 Electronic damper control for PASM and PDDC
For 992 S with PDDC up to 14.06.2020
Replaces 9A210222200
Fits:
Porsche 991.2 S
* with sports suspension (030) PASM (475) and PASM without lowering (477)
Porsche 991 turbo 2014-2020
Porsche 992 Turbo - with standard suspension (1P0)
Porsche 992 Turbo S - with standard suspension (1P0)
Porsche 992.1 S with PDCC up to 14.06.2020
Diagram ref no 1
A genuine DAYCO (6PK1775) multi-rib auxiliary drive belt, manufactured as a direct replacement for Porsche part number 9A210222200 / 0PB903137C / 0PB903137H. Transfers engine power to the auxiliary drive system, ensuring reliable operation of engine-driven accessories while maintaining smooth, efficient power transmission and dependable charging system performance.
Key Features & Benefits
• Genuine DAYCO OEM-quality drive belt
• Direct replacement for Porsche 9A210222200, 0PB903137C, 0PB903137H
• High-strength EPDM rubber construction
• Excellent resistance to heat, cracking, and stretching
• Precision multi-rib design for quiet, efficient operation
• Long service life with OEM-quality fitment
• Ideal for scheduled maintenance and belt replacement.
Why Replacing the Drive Belt Matters
The auxiliary drive belt operates continuously whenever the engine is running. As it ages, it can become worn, cracked, or stretched, reducing efficiency and potentially causing charging or accessory drive issues. Replacing the belt at the recommended service interval helps maintain reliable engine operation and reduces the risk of unexpected breakdowns.
When to Replace the Drive Belt
• Visible cracks, fraying, or glazing
• Squealing or chirping noises from the engine bay
• Signs of belt stretching or rib wear
• During major engine or accessory drive servicing
• If the belt has been contaminated by oil or coolant
• At the manufacturer's recommended service interval
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
0PB903137H
9A210222200
0PB903137C
0PB903137H
The product you are viewing cross references to these numbers
Price: €47.14
In stock