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Underdrive crankshaft pulley (with A/C) for Porsche 996 / 997 / 986 Boxster

3609001601-AC

Product Information

Under drive crankshaft pulley (with A/C) kit. Includes pulley, drive belt and new bolt. Pulley is made from 6061-T6 aluminum, Improve horsepower and torque while reducing parasitic drag from the alternator, power steering pump and water pump.

Pulley outer diameter: 123mm (measured from ribs to ribs)

FITMENT GUIDE:
Porsche 986 Boxster:
1997-1999 2.5L H6
2000-2004 2.7L H6
2000-2004 S 3.2L H6
986 Spec Boxster Legal

Porsche 987 Boxster / Cayman
2005- 2.7L H6
2005-2006 3.2L H6
2007- 3.4L H6

Porsche 996 / 997
1999 3.4L H6 NA
2001-2004 3.6L H6 NA
2005- 3.6L H6 NA

Will not work on 3.8L (S) or Turbo models

For INSTALLATION GUIDE CLICK HERE

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3609001601-AC

99610211562

99610511563

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Underdrive crankshaft pulley (without A/C) for Porsche 996 / 997 / 986 Boxster

3609001601-NO-AC

Product Information

Under drive crankshaft pulley (without A/C) kit. Includes pulley, drive belt and new bolt. Pulley is made from 6061-T6 aluminum, Improve horsepower and torque while reducing parasitic drag from the alternator, power steering pump and water pump.

FITMENT GUIDE:
Porsche 986 Boxster:
1997-1999 2.5L H6
2000-2004 2.7L H6
2000-2004 S 3.2L H6
986 Spec Boxster Legal

Porsche 987 Boxster / Cayman
2005- 2.7L H6
2005-2006 3.2L H6
2007- 3.4L H6

Porsche 996 / 997
1999 3.4L H6 NA
2001-2004 3.6L H6 NA
2005- 3.6L H6 NA

Will not work on 3.8L (S) or Turbo models

For INSTALLATION GUIDE CLICK HERE

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

3609001601-NO-AC

99610211562

99610511563

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Drive belt deflection roller Porsche 996 / Boxster 986 / Boxster 987 / 997

99610211856

Product Information

Drive belt deflection roller.

porsche

Fits:
Porsche 996 Carrera 3.4L / 3.6L 1997-05 Tiptronic gearbox
Porsche 997.1 Carrera 3.6L 2005-08 Tiptronic gearbox
Porsche 986 Boxster 2.5L 2.7L / 3.2L 1997-04 Manual & 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

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Diagram ref No 15

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99610211856

99610211856

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4 4 4 4

Drive belt deflection roller Porsche 996 / Boxster 986 / Boxster 987 / 997

99610211856/2

Product Information

Drive belt deflection roller.

oematch

99610211856

99610211850

99610211852

99610211853

99610211855

99610291853

The product you are viewing cross references to these numbers

4 4 4 4

Drive belt deflection roller Porsche 996 / Boxster 987 / Cayman 987C / 997

99710211900

Product Information

Drive belt deflection roller.

porsche

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

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Diagram ref No 12

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99710211900

99710211900

4149031111

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4 4 4 4

Drive belt deflection roller. Porsche 996 / Boxster 986 / Boxster 987 / Cayman 987C / 997

99610211958

Product Information

Drive belt deflection roller.

porsche

Fits:
Porsche 996 Carrera 3.4L / 3.6L 1997-05 Tiptronic gearbox
Porsche 997.1 Carrera 3.6L 2005-08 Tiptronic gearbox
Porsche 986 Boxster 2.5L / 2.7L / 3.2L 1997-04 Manual & 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

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Diagram ref No 12

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99610211958

99610211958

99610211957

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6 6 6 6 6 6

Drive belt deflection roller. Porsche 996 / Boxster 986 / Boxster 987 / Cayman 987C / 997

99610211958/1

Product Information

Drive belt deflection roller.

oematch

34536

99610211952

99610211954

99610211955

99610211957

99610211958

99610291955

The product you are viewing cross references to these numbers

Drive belt deflection roller. Porsche 996 / Boxster 987 / 997

99710211800

Product Information

Drive belt deflection roller.

porsche

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 987C 2.7L / 3.4L 2005-08 Manual transmission

Click 'Zoom in' for large parts diagram.
Diagram ref no 15

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99710211800

99710211800

4149031110

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Drive belt deflection roller. Porsche 996 / Boxster 987 / 997

99710211800/1

Product Information

Drive belt deflection roller.
This tensioner (or idler) pulley is designed for Porsche 911 (996/997) and Boxster/Cayman vehicles. It supports the serpentine/drive belt system, ensuring smooth, stable rotation and correct belt alignment. It helps maintain proper tension, reduces noise, and protects engine accessories from excessive stress. Built to original Porsche standards and engineered for precise fitment and durability.

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 987C 2.7L / 3.4L 2005-08 Manual transmission

Diagram ref no 15

Ideal replacement when the original pulley shows signs of wear, bearing noise, belt misalignment or visible belt damage - restoring accessory-drive reliability and avoiding secondary damage from belt failure.

The idler pulley plays a critical role in your accessory belt drive, maintaining the correct path and tension of the belt that powers many engine-mounted systems. When the pulley bearing deteriorates, or the surface becomes worn or grooved, the belt can slip, make noise, or even break—potentially causing loss of alternator, AC compressor or power-steering function. By replacing this component proactively with a quality OE-Match unit, you safeguard those systems and maintain proper engine accessory operation.

When and why to replace:
• Audible bearing noise or rumble coming from the pulley/belt area.
• Visible belt wear, glazing, fraying or mis-tracking across the pulley surface.
• Occasional belt slippage or accessory drive belt squeal on start-up or load.
• Accessory drive servicing (belt replacement, tensioner replacement) where it makes sense to fit the pulley at the same time.
• Higher-mileage vehicle where original pulley may have been in service for many years and bears may be near end-of-life.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99710211800

99710211800

4149031110

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Drive belt deflection roller. Porsche 996 / Boxster 987 / Cayman 987C / 997

99710211900/1

Product 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
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99710211900

99710211900

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Drive belt tensioning roller. Porsche 996 / Boxster 987 / Cayman 987C / 997

99710211700

Product Information

Drive belt tensioning roller.

porsche

Fits:
Porsche 996 Carrera 3.4L / 3.6L 6-speed Manual transmission
Porsche 997.1 Carrera 3.6L / 3.8L 6-speed Manual transmission
Porsche 987.1 Boxster 2.7L / 3.2L /3.4L 2004-08 Manual transmission
Porsche 987C.1 Cayman 2.7L / 3.4L 2005-08 Manual transmission

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Diagram ref no 8

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99710211700

99710211700

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Drive belt tensioning roller. Porsche 996 / Boxster 987 / Cayman 987C / 997

99710211700/1

Product Information

The Drive Belt Tensioning Roller, identified by part number 997.102.117.00, is a critical component in the accessory drive system of several Porsche models, including the 996, 987 (Boxster and Cayman), and 997 (Carrera) equipped with manual transmissions. This roller maintains proper tension on the serpentine belt, ensuring the efficient operation of engine accessories such as the alternator, power steering pump, and air conditioning compressor.

Fits:

Porsche Boxster 987 S 3.2/3.4L 2005-08/08 Manual transmission
Porsche 996 C2 3.4L 1997-08/01 6-speed Manual transmission
Porsche 996 C4 3.4L 1997-08/01 6-speed Manual transmission
Porsche 996 C2 3.6L 09/01-2005 6-speed Manual transmission
Porsche 996 C4 3.6L 09/01-2005 6-speed Manual transmission
Porsche 996 C4S 3.6L 09/01-2005 6-speed Manual transmission
Porsche 997 MK1 Carrera 2 3.6L 2005-08 6-speed Manual transmission
Porsche 997 MK1 Carrera 2S 3.8L 2005-08 6-speed Manual transmission
Porsche 997 MK1 Carrera 4 3.6L 2005-08 6-speed Manual transmission
Porsche 997 MK1 Carrera 4S 3.8L 2005-08 6-speed Manual transmission
Porsche Cayman 2.7L 987C 2006-08 Manual transmission
Porsche Cayman S 3.4L 987C 2005-08 Manual transmission

Common Tensioning Roller Issues and Why Replacement is Necessary. Over time, a tensioning roller can wear down due to constant exposure to engine heat and mechanical stress. Typical problems include:

Bearing Wear: The internal bearing may deteriorate, causing noise and reducing performance.
Seized Pulley: Rust or corrosion can lock the pulley, disrupting proper belt tension.
Cracked or Damaged Pulley: Physical damage can misalign the belt and hinder the roller’s function.
Replacing a worn tensioning roller is crucial to maintain proper belt operation, prevent squealing noises, and avoid potential damage to other engine components.

Click 'Zoom in' for large parts diagram.
Diagram ref no 8

Related reference numbers
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99710211700

99710211700

4149031008

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Drive belt tensioning roller. Porsche Boxster 987 / Cayman 987C / 997

99610211757

Product Information

Drive belt tensioning roller.

porsche

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

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99610211757

99610211757

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Drive belt tensioning roller. Porsche Boxster 987 / Cayman 987C / 997

99610211757/1

Product Information

Drive belt tensioning roller.

oematch

Fits:

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99610211757

99610211757

99610211750

99610211751

99610211753

99610211754

99610211756

99610291754

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4 4 4 4

Drive Belt. Porsche 981 / 981C / 991.1 / 991.2 / 992 / GT4

0PB903137A

Product Information

Drive Belt. Porsche 981 / 981C / 991.1 / 991.2 / 992 / GT4

porsche

Fits:
Porsche 991.1 Carrera 3.4L 2012-16 Engine MA1.04
Porsche 991.1 Carrera S 3.8L 2012-2016 Engine MA1.03
Cars without PDCC
Porsche 991.2 Carrera 3.0L 2017>> Engine MDC.KA
Cars without sport chassis

Porsche 992 Carrera
Porsche 992 S and GTS from 15.06.20
Cars without PDCC

Porsche 991.1 Turbo 3.8L 2014-18 Engine MA1.71
Porsche 991.2 Turbo 3.8L 2018-20
Cars without PDCC

Porsche 981 Boxster 2012-16
Porsche 981SP Boxster Spyder 2016
Porsche 982 (718) Boxster GTS 4.0Ltr

Porsche 981C Cayman 2014-16
Porsche 981 Cayman GT4 2016
Porsche 982C (718C) Cayman GTS 4.0Ltr

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Diagram ref no 7

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0PB903137A

9A110221800

6K1767

6PK1767

0PB903137A

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4 4 4 4

Drive belt. Porsche 981 / 981C / 991.1 / 991.2 / 992 / GT4

0PB903137A/1

Product Information

Drive Belt. Porsche 981 / 981C / 991.1 / 991.2 / 992 / GT4.
6 Ribs | Width: 21.36mm | Length: 1768mm.

Fits:
Porsche 991.1 Carrera 3.4L 2012-16 Engine MA1.04
Porsche 991.1 Carrera S 3.8L 2012-2016 Engine MA1.03
Cars without PDCC
Porsche 991.2 Carrera 3.0L 2017>> Engine MDC.KA
Cars without sport chassis

Porsche 992 Carrera
Porsche 992 S and GTS from 15.06.20
Cars without PDCC

Porsche 991.1 Turbo 3.8L 2014-18 Engine MA1.71
Porsche 991.2 Turbo 3.8L 2018-20
Cars without PDCC

Porsche 981 Boxster 2012-16
Porsche 981SP Boxster Spyder 2016
Porsche 718 Boxster GTS 4.0Ltr
Porsche 981C Cayman 2014-16
Porsche 981 Cayman GT4 2016
Porsche 718 Cayman GTS 4.0Ltr

Diagram ref no 7

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0PB903137A

0PB903137A

6PK1768

9A110221800

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DISPLAYING 1 to 16 (of 25 products)

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Also found on these pages

About Belts All Types

Title: Upgrading Your Porsche: Original and After-Market Engine Fan and Pulley Belts

Technical Specifications and Benefits:

Engine Fan:

High-quality materials and construction for optimal performance and durability.

Improved cooling efficiency, preventing overheating and maintaining engine health.

Enhanced airflow, promoting better engine combustion and power output.

Reduced noise and vibration for a smoother driving experience.

Direct fitment ensures hassle-free installation and compatibility with your Porsche model.

Pulley Belts:

Premium materials for increased strength and longevity.

Reliable power transmission, ensuring proper functioning of engine components.

Resistant to wear, heat, and stretching, minimizing the risk of belt failure.

Improved grip and traction, preventing slippage and maintaining consistent performance.

Precise sizing and alignment for optimum belt tension and efficiency.

Purchasing Considerations:

Authentic Porsche Parts: Choosing original Porsche engine fan and pulley belts ensures compatibility, precise fitment, and adherence to manufacturer standards.

After-Market Options: After-market options may offer cost savings while still providing reliable performance. However, careful research and verification of compatibility are necessary.

How Design911 Can Help:

At Design911, we specialize in providing a wide range of Porsche parts and accessories. With our extensive knowledge and expertise, we can help you find the correct engine fan and pulley belts for your specific Porsche model. Our team of professionals is dedicated to offering the best advice, ensuring you make informed decisions regarding upgrades or standard replacements. We strive to provide exceptional customer service and ensure that you receive the highest quality parts for your Porsche. Contact us today for personalized assistance and a seamless shopping experience.

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Belts All Types

Belts All Types