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Alternator belt. Porsche 944 / 968 - 99919229051
99919229051/2
Vehicle Group
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 Turbo S 3.0L 1993-94
Information
Alternator belt
OE Match alternator belt for Porsche 944 and 968 models without air conditioning. This replacement drive belt helps power the alternator and support correct charging system operation.
Fits:
Porsche 944 1989-91 Cars without air conditioning
Porsche 968 1992-95 Cars without air conditioning
Diagram ref no 6
The alternator belt transfers rotational drive from the engine pulley to the alternator. This allows the alternator to generate electrical power for the vehicle and charge the battery while the engine is running. A correctly tensioned and good-condition belt is essential for reliable electrical system operation.
Functions
• Replaces the alternator drive belt
• Drives the alternator from the engine pulley
• Supports correct battery charging
• Helps maintain electrical system performance
• Suitable for vehicles without air conditioning
• Replaces cracked, glazed, stretched, frayed, or slipping belts
• OE Match replacement for Porsche 944 and 968 charging system service.
Why Replace This Part?
Alternator belts wear over time due to heat, engine vibration, pulley contact, age, and tension changes. A worn belt can crack, glaze, stretch, fray, squeal, or slip on the pulleys. If the belt fails, the alternator may stop charging the battery, which can lead to warning lights, electrical faults, flat battery issues, or vehicle breakdown. Replacing the belt helps maintain dependable charging system operation.
When to Replace This Part
• The alternator belt is cracked, glazed, frayed, loose, or worn
• Belt squeal is heard during start-up or acceleration
• The battery warning light appears
• Charging system output is low or inconsistent
• The alternator, pulleys, or tensioning components are being serviced
• Preventative belt replacement is being carried out during maintenance
• The vehicle is undergoing Porsche 944 or 968 engine bay refurbishment.
Where it fits on the car
This belt fits on the alternator drive system on Porsche 944 and 968 models without air conditioning. It runs between the relevant engine pulley and alternator pulley according to the factory belt routing.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99919229051
The product you are viewing cross references to these numbers
OE Match alternator belt for Porsche 944 and 968 models without air conditioning. This replacement drive belt helps power the alternator and support correct charging system operation.
Fits:
Porsche 944 1989-91 Cars without air conditioning
Porsche 968 1992-95 Cars without air conditioning
Diagram ref no 6
The alternator belt transfers rotational drive from the engine pulley to the alternator. This allows the alternator to generate electrical power for the vehicle and charge the battery while the engine is running. A correctly tensioned and good-condition belt is essential for reliable electrical system operation.
Functions
• Replaces the alternator drive belt
• Drives the alternator from the engine pulley
• Supports correct battery charging
• Helps maintain electrical system performance
• Suitable for vehicles without air conditioning
• Replaces cracked, glazed, stretched, frayed, or slipping belts
• OE Match replacement for Porsche 944 and 968 charging system service.
Why Replace This Part?
Alternator belts wear over time due to heat, engine vibration, pulley contact, age, and tension changes. A worn belt can crack, glaze, stretch, fray, squeal, or slip on the pulleys. If the belt fails, the alternator may stop charging the battery, which can lead to warning lights, electrical faults, flat battery issues, or vehicle breakdown. Replacing the belt helps maintain dependable charging system operation.
When to Replace This Part
• The alternator belt is cracked, glazed, frayed, loose, or worn
• Belt squeal is heard during start-up or acceleration
• The battery warning light appears
• Charging system output is low or inconsistent
• The alternator, pulleys, or tensioning components are being serviced
• Preventative belt replacement is being carried out during maintenance
• The vehicle is undergoing Porsche 944 or 968 engine bay refurbishment.
Where it fits on the car
This belt fits on the alternator drive system on Porsche 944 and 968 models without air conditioning. It runs between the relevant engine pulley and alternator pulley according to the factory belt routing.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99919229051
99919229050
99919228250
99919228450
99919229051
The product you are viewing cross references to these numbers
€6.55
Now €5.89
In stock
Related products
Vehicle Group
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Information
Drive belt deflection roller.
Also referred to as a relay roller or deflection roller, responsible for guiding and maintaining proper routing and tension of the accessory drive belt system.
Fits:
Porsche 996 Carrera 3.4L / 3.6L 1997 - 2005 Tiptronic gearbox
Porsche 997.1 Carrera 3.6L 2005 - 2008 Tiptronic gearbox
Porsche 986 Boxster 2.5L / 2.7L / 3.2L 1997 - 2004 Manual & Tiptronic gearbox
Porsche 987.1 Boxster 2.7L / 3.2L /3.4L 2005 - 2008 Tiptronic gearbox
Porsche 987C.1 Cayman 2.7L / 3.4L 2005 - 2008 Tiptronic
Diagram ref No 12
The idler pulley supports the accessory drive belt, helping to:
• Maintain proper belt routing and tension, preventing slipping and reducing premature wear.
• Guide the belt around engine accessories such as the alternator, power steering pump, A/C compressor, and water pump.
• Ensure smooth operation of components driven by the belt for optimal engine performance.
If the idler pulley wears out or the bearing fails, you may hear squealing, chirping, or grinding noises, see uneven belt wear, or experience belt misalignment - indicators it’s time for replacement.
A worn or failing idler pulley can cause the drive belt to slip, misalign, or break, which can in turn disrupt power to critical engine accessories. Symptoms include belt noise, squealing, or loss of accessory function (e.g., A/C, alternator charging), potentially leading to more costly repairs if ignored. Replacing it with an OE Match pulley ensures proper belt tension and routing, helping keep your engine’s accessory systems functioning smoothly.
Replace the idler pulley if you notice any of the following:
• Squealing, chirping, or grinding noises from the belt area
• Visible belt misalignment or excessive wear
• Pulley bearing play or rough rotation to the touch
• Cracks or deterioration of the pulley surface
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610211958
The product you are viewing cross references to these numbers
Also referred to as a relay roller or deflection roller, responsible for guiding and maintaining proper routing and tension of the accessory drive belt system.
Fits:
Porsche 996 Carrera 3.4L / 3.6L 1997 - 2005 Tiptronic gearbox
Porsche 997.1 Carrera 3.6L 2005 - 2008 Tiptronic gearbox
Porsche 986 Boxster 2.5L / 2.7L / 3.2L 1997 - 2004 Manual & Tiptronic gearbox
Porsche 987.1 Boxster 2.7L / 3.2L /3.4L 2005 - 2008 Tiptronic gearbox
Porsche 987C.1 Cayman 2.7L / 3.4L 2005 - 2008 Tiptronic
Diagram ref No 12
The idler pulley supports the accessory drive belt, helping to:
• Maintain proper belt routing and tension, preventing slipping and reducing premature wear.
• Guide the belt around engine accessories such as the alternator, power steering pump, A/C compressor, and water pump.
• Ensure smooth operation of components driven by the belt for optimal engine performance.
If the idler pulley wears out or the bearing fails, you may hear squealing, chirping, or grinding noises, see uneven belt wear, or experience belt misalignment - indicators it’s time for replacement.
A worn or failing idler pulley can cause the drive belt to slip, misalign, or break, which can in turn disrupt power to critical engine accessories. Symptoms include belt noise, squealing, or loss of accessory function (e.g., A/C, alternator charging), potentially leading to more costly repairs if ignored. Replacing it with an OE Match pulley ensures proper belt tension and routing, helping keep your engine’s accessory systems functioning smoothly.
Replace the idler pulley if you notice any of the following:
• Squealing, chirping, or grinding noises from the belt area
• Visible belt misalignment or excessive wear
• Pulley bearing play or rough rotation to the touch
• Cracks or deterioration of the pulley surface
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610211958
99610211952
99610211954
99610211955
99610211957
99610211958
99610291955
The product you are viewing cross references to these numbers
€61.86
Now €55.67
In stock
Vehicle Group
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Information
Drive belt tensioning roller.
Fits:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610211757
The product you are viewing cross references to these numbers
Fits:
Porsche 986 Boxster 2.7L / 3.2L / 3.4L Manual or Tiptronic gearbox
Porsche 996 Carrera 3.4L / 3.6L 1997-05 Tiptronic gearbox
Porsche 997.1 Carrera 3.6L 2005-08 Tiptronic gearbox
Porsche 987.1 Boxster 2.7L / 3.2L / 3.4L 2005-08 Tiptronic gearbox
Porsche 987C.1 Cayman 2.7L / 3.4L 2005-08 Tiptronic gearbox
Click 'Zoom in' for the large parts diagram.
Diagram ref No 8
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610211757
99610211757
99610211750
99610211751
99610211753
99610211754
99610211756
99610291754
The product you are viewing cross references to these numbers
€59.50
Now €53.55
In stock
Vehicle Group
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Information
Tensioner element.
Restore proper serpentine belt tension and quiet operation with this tensioner element for Porsche 987 Boxster, 987C Cayman, and 997. Built to OEM dimensions and spring rate.
Fits:
Porsche 987 Boxster 2005 - 2008
Porsche 987C Cayman 2006 - 2008
Porsche 997 Carrera 2005 - 2008
Diagram ref no 2
Applies constant, calibrated force to the serpentine belt, compensating for belt stretch and engine vibrations to prevent slip, squeal, and premature belt wear. Often catalogued as “tensioner element / accessory drive belt tensioner.”
Position on car: Front of engine, serpentine belt drive—bolts to the bracket/mount assembly.
Why & when to replace:
• Belt squeal, flutter, or visible tensioner wobble
• Rough/idling noises from the front of engine, or belt glazing
• During belt service or accessory repairs (alternator, A/C, P/S)
Replacing the unit restores correct belt tension and accessory reliability
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710226000
The product you are viewing cross references to these numbers
Restore proper serpentine belt tension and quiet operation with this tensioner element for Porsche 987 Boxster, 987C Cayman, and 997. Built to OEM dimensions and spring rate.
Fits:
Porsche 987 Boxster 2005 - 2008
Porsche 987C Cayman 2006 - 2008
Porsche 997 Carrera 2005 - 2008
Diagram ref no 2
Applies constant, calibrated force to the serpentine belt, compensating for belt stretch and engine vibrations to prevent slip, squeal, and premature belt wear. Often catalogued as “tensioner element / accessory drive belt tensioner.”
Position on car: Front of engine, serpentine belt drive—bolts to the bracket/mount assembly.
Why & when to replace:
• Belt squeal, flutter, or visible tensioner wobble
• Rough/idling noises from the front of engine, or belt glazing
• During belt service or accessory repairs (alternator, A/C, P/S)
Replacing the unit restores correct belt tension and accessory reliability
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710226000
99710226000
34540
4149031109
99610226050
The product you are viewing cross references to these numbers
€86.22
Now €77.60
In stock