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Drive belt deflection roller. Porsche 996 / Boxster 987 / Cayman 987C / 997 - 99710211900
99710211900/1
Vehicle Group
- 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.
A direct-fit idler/deflection pulley for the auxiliary (serpentine) drive belt. Built to OE geometry, it guides the belt path, stabilises belt tracking, and helps maintain correct wrap on the alternator, A/C compressor and power-steering/water pump pulleys.
Fits:
Porsche 996 Carrera 3.4L / 3.6L 1997-05 6-speed Manual transmission
Porsche 997.1 Carrera 3.6L / 3.8L 2005-08 Manual transmission
Porsche 987.1 Boxster 2.7L / 3.2L / 3.4L 2005-08 Manual transmission
Porsche 987C.1 Cayman 2.7L / 3.4L 2005-08 Manual transmission
Diagram ref No 12
The deflection roller maintains smooth, stable tension in the auxiliary belt system. It helps guide the belt precisely over pulleys, reduces vibration, and ensures efficient power delivery to engine accessories such as the alternator, A/C compressor, and power steering pump. Built with OE-spec bearings, it delivers quiet operation and long-lasting reliability under high-speed, high-load conditions.
Over time, the bearing inside the roller can wear, dry out, or seize due to constant load and heat exposure. A failing roller may cause belt noise, vibration, or premature belt wear, potentially leading to accessory drive failure.
Replace the deflection roller when:
• You hear squeaking, chirping, or grinding from the belt area
• The pulley feels rough or loose when rotated by hand
• During belt or tensioner replacement as preventive maintenance
• There are signs of belt misalignment or edge fraying
Installing a new deflection roller ensures correct belt tracking, quiet performance, and dependable accessory drive operation.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710211900
The product you are viewing cross references to these numbers
A direct-fit idler/deflection pulley for the auxiliary (serpentine) drive belt. Built to OE geometry, it guides the belt path, stabilises belt tracking, and helps maintain correct wrap on the alternator, A/C compressor and power-steering/water pump pulleys.
Fits:
Porsche 996 Carrera 3.4L / 3.6L 1997-05 6-speed Manual transmission
Porsche 997.1 Carrera 3.6L / 3.8L 2005-08 Manual transmission
Porsche 987.1 Boxster 2.7L / 3.2L / 3.4L 2005-08 Manual transmission
Porsche 987C.1 Cayman 2.7L / 3.4L 2005-08 Manual transmission
Diagram ref No 12
The deflection roller maintains smooth, stable tension in the auxiliary belt system. It helps guide the belt precisely over pulleys, reduces vibration, and ensures efficient power delivery to engine accessories such as the alternator, A/C compressor, and power steering pump. Built with OE-spec bearings, it delivers quiet operation and long-lasting reliability under high-speed, high-load conditions.
Over time, the bearing inside the roller can wear, dry out, or seize due to constant load and heat exposure. A failing roller may cause belt noise, vibration, or premature belt wear, potentially leading to accessory drive failure.
Replace the deflection roller when:
• You hear squeaking, chirping, or grinding from the belt area
• The pulley feels rough or loose when rotated by hand
• During belt or tensioner replacement as preventive maintenance
• There are signs of belt misalignment or edge fraying
Installing a new deflection roller ensures correct belt tracking, quiet performance, and dependable accessory drive operation.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710211900
99710211900
The product you are viewing cross references to these numbers
Price: €61.36
In stock
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Vehicle Group
- Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
- Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
- Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
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- Porsche Cayman S 718 2.5L Manual (350 Bhp)
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- Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
Information
Drive belt
The Genuine Porsche 9A210222500 drive belt is an OE V-ribbed / serpentine belt for selected Porsche 718 Boxster S and 718 Cayman S 2.5L models. It drives the engine auxiliary components, helping maintain reliable charging and accessory system operation. Ideal for routine servicing or replacing a cracked, noisy, slipping or worn original belt.
Fits
Porsche 718 Boxster S 2.5Ltr 2017>>
Porsche 718 Cayman S 2.5Ltr 2017>>
Diagram ref no 1
This original Porsche V-ribbed / serpentine belt is part of the engine auxiliary drive system and helps drive key belt-driven components from the engine pulley system.
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 reduce 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, pulley contact, engine speed changes and belt tension 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 engine accessory performance. It is also good practice to inspect the tensioner, idler pulleys and related belt-drive components when replacing the belt.
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 of the Porsche 718 Boxster S and 718 Cayman S 2.5L engine. It routes around the relevant pulleys, idlers and tensioner according to the factory belt layout.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A210222500
The product you are viewing cross references to these numbers
The Genuine Porsche 9A210222500 drive belt is an OE V-ribbed / serpentine belt for selected Porsche 718 Boxster S and 718 Cayman S 2.5L models. It drives the engine auxiliary components, helping maintain reliable charging and accessory system operation. Ideal for routine servicing or replacing a cracked, noisy, slipping or worn original belt.
Fits
Porsche 718 Boxster S 2.5Ltr 2017>>
Porsche 718 Cayman S 2.5Ltr 2017>>
Diagram ref no 1
This original Porsche V-ribbed / serpentine belt is part of the engine auxiliary drive system and helps drive key belt-driven components from the engine pulley system.
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 reduce 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, pulley contact, engine speed changes and belt tension 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 engine accessory performance. It is also good practice to inspect the tensioner, idler pulleys and related belt-drive components when replacing the belt.
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 of the Porsche 718 Boxster S and 718 Cayman S 2.5L engine. It routes around the relevant pulleys, idlers and tensioner according to the factory belt layout.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A210222500
9A210222400
The product you are viewing cross references to these numbers
Price: €70.25
Orderable
Vehicle Group
- Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
- Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
- Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
- Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
- Porsche Cayman S 718 2.5L Manual (350 Bhp)
- Porsche Cayman S 718 2.5L PDK (350 Bhp)
- Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
- Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
Information
Drive belt
Fits
Porsche 718 Boxster S 2.5Ltr 2017>>
Porsche 718 Cayman S 2.5Ltr 2017>>
Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A210222500
The product you are viewing cross references to these numbers
Fits
Porsche 718 Boxster S 2.5Ltr 2017>>
Porsche 718 Cayman S 2.5Ltr 2017>>
Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A210222500
9A210222400
The product you are viewing cross references to these numbers
Price: €36.27
In stock
Vehicle Group
- Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
- Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
- Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
- Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
- Porsche Cayman S 718 2.5L Manual (350 Bhp)
- Porsche Cayman S 718 2.5L PDK (350 Bhp)
- Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
- Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
Information
Drive belt
This OE Match drive belt is a replacement auxiliary engine belt for Porsche 718 Boxster S and 718 Cayman S models with the 2.5L engine. It is designed to match the original-style fitment and function. This replacement auxiliary belt helps drive engine accessories and supports reliable engine system operation.
Fits
Porsche 718 Boxster S 2.5Ltr 2017>>
Porsche 718 Cayman S 2.5Ltr 2017>>
Diagram ref no 1
The drive belt transfers rotational power from the engine pulley to the relevant auxiliary components. A correctly fitted and tensioned belt is essential for dependable accessory drive performance, proper pulley contact, and overall engine reliability.
Functions
• Replaces the auxiliary engine drive belt
• Transfers drive from the engine pulley to auxiliary components
• Supports reliable accessory belt operation
• Helps maintain correct belt tension and pulley contact
• Replaces cracked, glazed, stretched, frayed, noisy, or slipping belts
• Suitable for scheduled servicing and preventative maintenance
• OE Match replacement for Porsche 718 2.5L engine service.
Why Replace This Part?
Drive belts wear over time due to heat, engine vibration, pulley contact, age, tension changes, and engine bay conditions. A worn belt can crack, glaze, stretch, fray, squeal, slip, or fail completely. If the belt fails, driven auxiliary systems may stop operating correctly, which can lead to warning lights, charging issues, accessory faults, or vehicle breakdown. Replacing the belt helps restore dependable auxiliary drive performance.
When to Replace This Part
• The drive belt is cracked, glazed, frayed, stretched, or worn
• Belt squeal, chirping, or slipping is present
• The belt does not track correctly on the pulleys
• The belt tensioner, pulleys, alternator, or related components are being serviced
• Charging or accessory drive faults are present
• Preventative belt replacement is being carried out during scheduled maintenance
• The vehicle is undergoing Porsche 718 Boxster S or Cayman S engine service.
Where it fits on the car
This drive belt fits within the engine auxiliary belt drive system on Porsche 718 Boxster S and 718 Cayman S 2.5L models. It runs around the relevant pulleys according to the factory belt routing.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A210222500
The product you are viewing cross references to these numbers
This OE Match drive belt is a replacement auxiliary engine belt for Porsche 718 Boxster S and 718 Cayman S models with the 2.5L engine. It is designed to match the original-style fitment and function. This replacement auxiliary belt helps drive engine accessories and supports reliable engine system operation.
Fits
Porsche 718 Boxster S 2.5Ltr 2017>>
Porsche 718 Cayman S 2.5Ltr 2017>>
Diagram ref no 1
The drive belt transfers rotational power from the engine pulley to the relevant auxiliary components. A correctly fitted and tensioned belt is essential for dependable accessory drive performance, proper pulley contact, and overall engine reliability.
Functions
• Replaces the auxiliary engine drive belt
• Transfers drive from the engine pulley to auxiliary components
• Supports reliable accessory belt operation
• Helps maintain correct belt tension and pulley contact
• Replaces cracked, glazed, stretched, frayed, noisy, or slipping belts
• Suitable for scheduled servicing and preventative maintenance
• OE Match replacement for Porsche 718 2.5L engine service.
Why Replace This Part?
Drive belts wear over time due to heat, engine vibration, pulley contact, age, tension changes, and engine bay conditions. A worn belt can crack, glaze, stretch, fray, squeal, slip, or fail completely. If the belt fails, driven auxiliary systems may stop operating correctly, which can lead to warning lights, charging issues, accessory faults, or vehicle breakdown. Replacing the belt helps restore dependable auxiliary drive performance.
When to Replace This Part
• The drive belt is cracked, glazed, frayed, stretched, or worn
• Belt squeal, chirping, or slipping is present
• The belt does not track correctly on the pulleys
• The belt tensioner, pulleys, alternator, or related components are being serviced
• Charging or accessory drive faults are present
• Preventative belt replacement is being carried out during scheduled maintenance
• The vehicle is undergoing Porsche 718 Boxster S or Cayman S engine service.
Where it fits on the car
This drive belt fits within the engine auxiliary belt drive system on Porsche 718 Boxster S and 718 Cayman S 2.5L models. It runs around the relevant pulleys according to the factory belt routing.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A210222500
9A210222400
The product you are viewing cross references to these numbers
Price: €28.91
In stock