Please wait… 
Please wait while we process your order,
do not press the back button… 
Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://www.design911.co.uk/images/schemaLogo.png https://www.design911.co.uk/images/schemaLogo.png +443456003478 https://www.design911.co.uk Facebook Instagram

Belts / Tensioners / Rollers

Refine by Car Type
Filter by brand
DISPLAYING 1 to 16 (of 53 products)
1 2 3 4
Special Order item
99919230550
Product Information
Product Information
Air con belt. SIZE: 12.5 x 1125.

porsche

Fits:
Porsche 911 Turbo 1978-83
Porsche 928 1978-89 *
*Cars upto 1989

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Related, superseded, cross reference or alternative numbers for comparison.

99919230550
99919230550

The product you are viewing cross references to these numbers
99919230550/1
Product Information
Product Information
Air con belt. SIZE : 12.5 x 1125.

meyle

Fits:
Porsche 911 Turbo 1978-83
Porsche 928 1978-89 *
*Cars upto 1989

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Related, superseded, cross reference or alternative numbers for comparison.

99919230550
99919230550
052 013 1125

The product you are viewing cross references to these numbers
Special Order item
99919233550
Product Information
Product Information
Air con belt. Size 12.5 x 1080.
porsche

Fits:
Porsche 928 1990-95
Car with option:
M637 Club Sport CS
M573 Air Conditioner
M639 Version GT

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Related, superseded, cross reference or alternative numbers for comparison.

99919233550
99919233550

The product you are viewing cross references to these numbers
Special Order item
99919230650
Product Information
Product Information
Air pump belt.
porsche

Fits:
Porsche 928 S4 / GT / GTS 1987-95

Click 'Zoom in' for large parts diagram.
Diagram ref no 11

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Related, superseded, cross reference or alternative numbers for comparison.

99919230650
99919230650

The product you are viewing cross references to these numbers
99919230650/1
Product Information
Product Information
Air pump belt.
Width: 13,0 mm, Length: 950,0 mm.

dayco

Fits:
Porsche 928 S4 / GT / GTS 1987-95

Click 'Zoom in' for large parts diagram.
Diagram ref no 11

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Related, superseded, cross reference or alternative numbers for comparison.

99919230650
99919230650
13A0950C

The product you are viewing cross references to these numbers
Special Order item
99919213550
Product Information
Product Information
Alternator belt.

porsche

Fits:
Porsche 928 1978-81

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

99919213550
99919213550

The product you are viewing cross references to these numbers
99919213550/1
Product Information
Product Information
Alternator belt.
Width: 10 mm | Length: 875 mm.

gates

Fits:
Porsche 928 1978-81

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

99919213550
99919213550
10A0875C

The product you are viewing cross references to these numbers
Special Order item
99919221451
Product Information
Product Information
Alternator belt. K4 x 858.

porsche

Fits:
Porsche 928 1982-83

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

99919221451
99919221450
99919221451

The product you are viewing cross references to these numbers
99919221451/1
Product Information
Product Information
Alternator belt.

Length: 863 mm
Number of ribs: 4

meyle

Fits:
Porsche 928 1982-83

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

99919221451
99919221450
99919221451
050 004 0863

The product you are viewing cross references to these numbers
99919225050/1
Product Information
Product Information
Alternator Belt.
The OE Match Alternator Belt is a high-quality replacement drive belt designed to transfer power from the engine crankshaft to the alternator and other belt-driven ancillary components where applicable. Manufactured to OE specifications for fit, durability and performance, this belt ensures reliable operation of the vehicle's charging system and helps maintain consistent electrical power supply. 

Fits:
  • Porsche 928S2 4.7L 1984-86

Constructed from high-strength, heat-resistant materials, the alternator belt is engineered to withstand continuous rotation, engine heat and varying load conditions. Proper belt operation is essential for maintaining battery charging, electrical system performance and overall vehicle reliability.  

What This Product Does:
  • Transfers engine power to the alternator.
  • Enables the alternator to generate electrical power.
  • Maintains battery charging during vehicle operation.
  • Supports the operation of the vehicle's electrical systems.
  • Provides reliable power transmission under varying engine speeds.
  • Helps ensure consistent charging system performance.
  • Contributes to overall engine accessory operation.

Symptoms Of Wear Or Failure:
  • Squealing or chirping noises from the engine bay.
  • Battery warning light illuminated on the dashboard.
  • Weak or discharged battery.
  • Electrical system performance issues.
  • Dimming headlights or interior lights.
  • Visible cracking, fraying or glazing of the belt.
  • Belt slipping during operation.
  • Complete loss of charging system function if the belt breaks.
  • Difficulty starting due to insufficient battery charging.

Why Replacement Matters:

  • Alternator belts are subjected to constant tension, high rotational speeds, temperature fluctuations and environmental exposure. Over time, the belt material can harden, crack, stretch or wear, reducing its ability to maintain proper grip and power transmission.
  • A worn belt may slip, causing reduced alternator output and inadequate battery charging. If the belt fails completely, the alternator will no longer generate electrical power, potentially leading to battery discharge, electrical system failure and vehicle breakdown. In some applications, a failed belt may also affect the operation of other engine-driven accessories.
  • Replacing a worn alternator belt helps maintain reliable charging system performance, prevents unexpected breakdowns and ensures continued operation of critical electrical systems. An OE Match replacement provides factory-style fitment, dependable durability and long service life, helping keep your Porsche operating at its best.



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

99919225050
99919225050

The product you are viewing cross references to these numbers
99919225050/2
Product Information
Product Information
Alternator belt.

Length: 890 mm
Number of ribs: 5

Fits:

Porsche 928 - 1984 to 1986

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

99919225050
99919225950
99919225050

The product you are viewing cross references to these numbers
Special Order item
99919226650
Product Information
Product Information
Alternator belt.

porsche

Fits:
Porsche 928 1985-95
Cars with manual transmission only

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

99919226650
99919226650
99919226950

The product you are viewing cross references to these numbers
99919226650/1
Product Information
Product Information
Alternator Belt. Number of ribs: 6, Length: 862,0 mm.

dayco

Fits:
Porsche 928 1985-95
Cars with manual transmission only

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

99919226650
99919226650
6PK862
99919226950

The product you are viewing cross references to these numbers
Special Order item
99919234750
Product Information
Product Information
Alternator belt.

porsche

Fits:
Porsche 928 1987-95
Automatic cars only

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

99919234750
99919234750

The product you are viewing cross references to these numbers
99919234750/1
Product Information
Product Information
Alternator belt.

dayco

Fits:
Porsche 928 1987-95
Automatic cars only

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

99919234750
99919234750
6PK875

The product you are viewing cross references to these numbers
Special Order item
92860711000
Product Information
Product Information
Belt Tensioner Connection Cable.

Fits:
Porsche 928 S4 / GT / GTS 1989>>1995

Diagram Ref No 34

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

92860711000
92860711000

The product you are viewing cross references to these numbers
DISPLAYING 1 to 16 (of 53 products)
1 2 3 4
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.

You may also like
Popular Models