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Belts / Tensioners / Rollers

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DISPLAYING 1 to 8 (of 8 products)
958903133/1
Product Information
Product Information
Belt tensioner roller. 

Fits:
Porsche 958 Cayenne 3.0L DIESEL 2011 - 2018
Porsche 970 Panamera 3.0L DIESEL 2012 - 2016
Porsche 95B.1 Macan 3.0L TDI 2014 - 2018

Diagram ref no 1

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958903133
95810236151
95810236150
958903133

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958903133/2
Product Information
Product Information
Belt tensioner roller. 
This tensioner helps maintain the correct tension and routing of the accessory (serpentine) drive belt, which powers multiple engine-driven components such as the alternator, air conditioning compressor, and other auxiliary systems. By applying consistent force to the belt, the tensioner reduces slack, prevents belt slip, and supports smooth belt operation under varying engine loads and temperatures.

Fits:
Porsche 958 Cayenne 3.0L DIESEL 2011 - 2018
Porsche 970 Panamera 3.0L DIESEL 2012 - 2016
Porsche 95B.1 Macan 3.0L TDI 2014 - 2018

Diagram ref no 1

Application:
Accessory drive belt tensioner assembly - installed in the front engine accessory drive system to control belt tension and alignment.

Function:
Applies and regulates tension to the accessory drive belt
  Maintains proper belt alignment over pulleys
  Reduces belt chatter and premature wear
  Helps ensure reliable operation of belt-driven accessories

A worn or weak belt tensioner can lead to belt slip, increased noise (squeal or chirp), uneven belt wear, and reduced accessory performance. Replacing a failing tensioner restores proper tension control and helps prolong the life of the belt and pulleys - improving reliability and reducing the risk of accessory drive failures.

Replace the tensioner if you notice:
   Squealing or chirping from the belt area
   Visible belt wear or fraying
   Belt slipping under load
   Rough or noisy pulley bearing movement
   During routine accessory belt or tensioner service intervals

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958903133
95810236151
95810236150
958903133

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958903133
Product Information
Product Information
Belt pensioner roller.

porsche

Fits:
Porsche 958 Cayenne 3.0L DIESEL
Porsche 970 Panamera 3.0L DIESEL 2012-16
Porsche 95B Macan 3.0L TDI 2014-18

Click 'Zoom in' for large parts diagram.
Diagram ref no 1

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958903133
95810236151
95810236150
958903133

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95510211921/1
Product Information
Product Information
Drive belt deflection roller. EACH. 2 per engine.

oematch

Outer Diameter: 65mm
Width: 26mm
Inner Diameter: 17mm

Fits:
Porsche 957 Cayenne 3.0L DIESEL 2009-12
Porsche 958 Cayenne 3.0L DIESEL
Porsche 970 Panamera 3.0L DIESEL 2012-16
Porsche 95B Macan 3.0L TDI 2014-18

Click 'Zoom in' for large parts diagram.
Diagram ref no 12



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95510211921
95510211921
95510211920

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Special Order item
95510211921
Product Information
Product Information
Drive belt deflection roller. EACH.

porsche

Fits:
Porsche 957 Cayenne 3.0L DIESEL 2009-12
Porsche 958 Cayenne 3.0L DIESEL
Porsche 970 Panamera 3.0L DIESEL 2012-16
Porsche 95B Macan 3.0L TDI 2014-18

Click 'Zoom in' for large parts diagram.
Diagram ref no 12

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95510211921
95510211921
95510211920

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Special Order item
95810221610
Product Information
Product Information
Drive belt. 6 PK 21.36 X 2518
Genuine Porsche OE drive belt for Porsche 958 Cayenne 3.0L Diesel and 970 Panamera 3.0L Diesel models. This original Porsche Poly-V / serpentine belt forms part of the engine accessory drive system and helps drive key auxiliary components from the engine pulley system.

Fits:
Porsche 958 Cayenne 3.0L Diesel 2012 - 2018
Porsche 970 Panamera 3.0L Diesel 2012 - 2016

Diagram ref no 16

This belt is used on selected Porsche 3.0L diesel engines and is commonly listed for Porsche 958 Cayenne Diesel and 970 Panamera Diesel applications.

What This Part Does / Functions
•  Transfers drive from the engine crankshaft pulley to auxiliary components
•  Helps drive the alternator to maintain battery charging
•  Supports operation of the water pump, power steering pump and air-conditioning compressor where included in the belt routing
•  Helps maintain correct operation of the engine accessory drive system
•  Provides the correct OE Porsche belt profile and fitment
•  Helps reduce belt slip, squeal and accessory-drive faults when correctly installed
•   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, fray, stretch or lose grip. A worn belt may cause squealing noises, poor charging performance, coolant circulation issues, power steering problems, air-conditioning faults or complete accessory drive failure. Replacing the belt with a Genuine Porsche OE drive belt helps restore reliable auxiliary drive operation and protects key engine systems that depend on the belt-driven components.

When to Replace This Part
•   If the belt is cracked, glazed, frayed or visibly worn
•   If the belt squeals, slips or makes noise on start-up or under load
•   If the battery or charging warning light appears
•   If there are power steering, cooling or air-conditioning symptoms linked to belt slip
•   During scheduled service or preventative belt replacement
•   When replacing the belt tensioner, idler pulleys, alternator, water pump or A/C compressor
•   If the belt has been contaminated by oil, coolant or road debris
•   When restoring the engine bay with correct OE Porsche service parts.

Where It Fits on the Car
This belt fits on the front engine accessory drive system of the 3.0L diesel engine. It routes around the crankshaft pulley, tensioner, idler pulleys and driven accessories according to the factory belt layout. Porsche dealer listings describe the routing for Cayenne 3.0L Diesel as including the crankshaft pulley, tensioner, idlers, alternator, water pump, power steering pump and compressor.

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

95810221610
95810221610
6PK2520

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95810221610/1
Product Information
Product Information
Drive belt. 6 PK 21.36 X 2520

Fits:
Porsche 958 Cayenne 3.0L DIESEL 2012-18
Porsche 970 Panamera 3.0L DIESEL 2012-16

Diagram ref no 16

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

95810221610
95810221610

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95810221610/2
Product Information
Product Information
Drive belt. 6 PK 21.36 X 2518
This OE Match drive belt is a replacement auxiliary engine belt for Porsche 958 Cayenne 3.0L Diesel and 970 Panamera 3.0L Diesel models. It is designed to match the original-style fitment and function, helping maintain correct belt drive operation across the engine accessory system.

Fits:
Porsche 958 Cayenne 3.0L DIESEL 2012 - 2018
Porsche 970 Panamera 3.0L DIESEL 2012 - 2016

Diagram ref no 16

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 and overall engine system reliability.

Functions
•  Replaces the 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 routine servicing and preventative maintenance
•  OE Match replacement for Porsche Diesel engine service.

Why Replace This Part?
Drive belts wear over time due to heat, vibration, pulley contact, age, tension changes, and engine bay conditions. A worn belt can crack, glaze, stretch, fray, squeal, slip, or fail completely. Replacing the belt helps maintain reliable auxiliary system operation and reduces the risk of belt-related breakdowns.

When to Replace This Part
•   The belt is cracked, glazed, frayed, stretched, or worn
•   Belt squeal or chirping is heard during start-up or acceleration
•   The belt is slipping or not tracking correctly
•   The belt tensioner, pulleys, alternator, or related components are being serviced
•   Preventative belt replacement is being carried out during scheduled maintenance
•   The engine accessory drive system is being inspected
•   The vehicle is undergoing Porsche Cayenne or Panamera Diesel engine service.

Where it fits on the car
This drive belt fits within the engine auxiliary belt drive system on Porsche 958 Cayenne 3.0L Diesel and 970 Panamera 3.0L Diesel 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.

95810221610
95810221610
6PK2520

The product you are viewing cross references to these numbers
DISPLAYING 1 to 8 (of 8 products)
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About Belts / Tensioners / Rollers

Engine Rebuild Belts, Tensioners & Rollers – Precision Timing for Reliable Porsche Performance

Engine rebuild belts, tensioners, and rollers are essential components in maintaining your Porsche’s precise engine timing and smooth operation. These parts work together to synchronise the camshaft and crankshaft, ensuring valves open and close at exactly the right time for optimal combustion. Over time, these components can wear or deteriorate, especially under high performance or extended use, making replacement vital during an engine rebuild or major service.

At Design911, we supply a full range of genuine and high-quality belts, tensioners, and rollers for various Porsche models including, 911, Boxster, Cayman, Cayenne, Macan, and Panamera models. Each component is designed for strength, accuracy, and long-lasting reliability — ensuring your rebuilt Porsche engine performs flawlessly mile after mile.

What Do Engine Belts, Tensioners & Rollers Do?

These components form the heart of the engine’s timing and auxiliary systems. They:

  • Drive key engine components, including the camshaft, alternator, and water pump.
  • Maintain accurate timing for optimal combustion and efficiency.
  • Reduce friction and noise through smooth roller and tensioner operation.
  • Ensure consistent belt tension to prevent slippage or premature wear.

Together, they guarantee your Porsche’s engine runs smoothly, efficiently, and reliably — whether cruising or driving at peak performance.

Why Do Belts, Tensioners & Rollers Fail?

Exposure to high temperatures, vibration, and constant motion causes natural wear over time. Common causes of failure include:

  • Aging rubber belts becoming brittle or cracked.
  • Worn bearings in rollers or tensioners leading to noise or vibration.
  • Loss of tension causing belt slippage or timing misalignment.
  • Contamination from oil or coolant degrading materials.
  • Extended maintenance intervals leading to unexpected failure.

Symptoms of failing components include squealing noises, poor engine performance, rough idle, or even timing belt failure, which can cause severe engine damage if ignored.

Why Replace Belts, Tensioners & Rollers During an Engine Rebuild?

Replacing these components during an engine rebuild ensures long-term reliability and eliminates the risk of future timing-related failures. A fresh set of belts, rollers, and tensioners restores precision, efficiency, and performance — protecting your investment.

Benefits of replacement include:

  • Restored precise timing and smooth operation.
  • Reduced risk of catastrophic engine failure.
  • Enhanced reliability and longevity of the rebuild.
  • Quieter, more efficient engine performance.

All components available from Design911 are made using premium-grade materials, precision bearings, and advanced heat-resistant compounds, ensuring maximum durability and performance in high-stress Porsche engines.

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