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Porsche > 944 (1982-1991) > Engine Rebuild Parts >

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Alternator Belt Porsche 924S / 944

99919220451

Product Information

Alternator Belt for cars WITHOUT Air Conditioning. 736mm Belt.

porsche

Fits:
Porsche 924S 1986-88
Porsche 944 1982-85

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99919220451

99919220450

99919220451

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Alternator belt. Porsche 924S / 944

99919220451/1

Product Information

Alternator Belt for cars WITHOUT Air Conditioning. 736mm Belt.

Fits:
Porsche 924S 1986-88
Porsche 944 1982-85

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Related, superseded, cross reference or alternative numbers for comparison.

99919220451

99919220450

050 005 0735

99919220451

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Alternator belt. Porsche 944 / 968

99919229051

Product Information

Alternator belt
Genuine Porsche OE alternator belt for Porsche 944 and 968 models. It drives the alternator, supports correct battery charging and helps maintain reliable electrical system operation. Ideal for routine maintenance, alternator service or replacing a cracked, slipping or worn original belt.

Fits:
Porsche 944 1989-91 Cars without air conditioning
Porsche 968 1992-95 Cars without air conditioning

Diagram ref no 6

This belt is commonly listed for Porsche 944 and 968 transaxle models, particularly applications without air conditioning / A/C delete specification, depending on model year and equipment.

Cross-reference / related numbers include: 99919229050, 99919228250, 99919228450

What This Part Does / Functions
• Drives the alternator from the engine pulley system
• Helps the alternator charge the battery while the engine is running
• Supports correct operation of the vehicle electrical system
• Helps maintain stable voltage supply to electrical components
• Provides factory-correct belt size and fitment where specified
• Replaces a worn, cracked, stretched or noisy alternator belt
• Maintains OE Porsche belt-drive reliability and fit.

Why Replace This Part?
The alternator belt is a wear item and can deteriorate from age, heat, tension, pulley wear and general engine operation. A worn belt may crack, glaze, stretch, squeal or slip, which can reduce alternator output and lead to charging system problems. Replacing the belt with a Genuine Porsche OE alternator belt helps restore correct alternator drive, charging performance and factory belt fitment.

When to Replace This Part
• If the alternator belt is cracked, glazed or frayed
• If the belt squeals or slips during engine operation
• If the battery warning light appears due to poor alternator drive
• During routine belt inspection or scheduled maintenance
• When replacing alternator, pulleys or belt tensioning components
• If the belt has become stretched or tension cannot be set correctly
• When recommissioning a stored Porsche 944 or 968
• When restoring the belt drive system with correct OE Porsche parts.

Where It Fits on the Car
This belt fits on the front engine accessory drive system, where it drives the alternator from the engine pulley arrangement. Exact routing depends on model year, engine type and whether the vehicle has air conditioning or an A/C delete setup.

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

99919229051

99919229050

99919228250

99919228450

99919229051

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3 3 3

Alternator belt. Porsche 944 / 968

99919229051/1

Product Information

Alternator belt.
Width: 21 mm | Length: 720 mm
Number of ribs: 6

The DAYCO alternator belt (6PK720) is an OEM-quality multi-rib drive belt manufactured to meet or exceed original equipment specifications, it provides reliable power transmission from the crankshaft to the alternator, ensuring the battery remains charged and the vehicle's electrical systems operate efficiently. It is a direct replacement for Porsche part 99919229051.

Fits:
Porsche 944 1989-91 Cars without air conditioning
Porsche 968 1992-95 Cars without air conditioning

Diagram ref no 6

Drives the alternator to keep the battery charged and supply power to the vehicle's electrical systems. It ensures efficient power transmission while helping maintain reliable engine accessory operation.

Key Features & Benefits
• Genuine DAYCO OEM-quality drive belt
• Direct replacement for Porsche 99919229051
• High-strength multi-rib (poly-V) construction
• Excellent resistance to heat, wear, and stretching
• Quiet, smooth operation
• Helps maintain reliable charging system performance

Why Replacing an Alternator Belt Matters
The alternator belt is constantly exposed to heat, tension, and engine vibration. As it wears, it can slip or crack, reducing charging efficiency and potentially leaving the vehicle without electrical power. Replacing the belt at the recommended service interval helps maintain reliable charging performance and prevents unexpected breakdowns.

When to Replace the Alternator Belt
• Visible cracks, fraying, or glazing on the belt
• Squealing noises from the engine bay
• Battery warning light illuminated
• Reduced charging performance
• During major engine or accessory servicing
• At the manufacturer's recommended replacement interval

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

99919229051

99919229050

99919228250

99919228450

6PK720

99919229051

The product you are viewing cross references to these numbers

3 3 3

Alternator belt. Porsche 944 / 968

99919229051/2

Product 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

99919229050

99919228250

99919228450

99919229051

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Balance belt idler roller. Porsche 924S / 944 / 968

94410227706/2

Product Information

Balance belt idler roller.
Outer diameter: 49.8 mm,
Width: 22 mm

oematch

Fits:
Porsche 924S 1986-88
Porsche 944 1982-91 all models
Porsche 968 1992-95 all models

Click 'Zoom in' for large parts diagram.
Diagram Ref No 11.

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

94410227706

94410227701

94410227702

94410227703

94410227704

94410227706

604210

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4 4 4 4

Balance belt tensioner gear. Porsche 924S / 944 / 968

94410202507

Product Information

Balance belt tensioner gear.

porsche

Fits:
Porsche 924S 2.5 M44.01,M44.03 M44.07 M44.08
Porsche 944 2.5 M44.01 1981/06- 1984/12
Porsche 944 2.5 M44.07 M44.40 M44.50 1985/01- 1988/07
Porsche 944 2.5 M44.51 1987/08-1988/08
Porsche 944 2.5 M44.52 1988/09-1991/07
Porsche 944 2.7 M44.11 1988/09- 1989/08
Porsche 944 3.0 16V M44.41 1988/12-1991/07
Porsche 968 3.0 M44.43 M44.44 1992-

Click 'Zoom in' for large parts diagram.
Diagram Ref No 10.

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

94410202507

94410202507

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4 4 4 4

Balance belt tensioner gear. Porsche 924S / 944 / 968

94410202507/2

Product Information

Balance belt tensioner gear. Porsche 924S / 944 / 968

oematch

94410202507

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Balance shaft belt. Porsche 924S / 944 / 968

94410221904

Product Information

Balance shaft belt.

porsche

Fits:
Porsche 924S 1986-88
Porsche 944 1982-91 all models
Porsche 968 1992-95 all models

Click 'Zoom in' for large parts diagram.
Diagram Ref No 14.

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

94410221904

94410221904

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Balance shaft belt. Porsche 924S / 944 / 968

94410221904/1

Product Information

Balance shaft belt.
Width: 18 mm | Length: 1048 mm
Number of Teeth: 110 | Tooth Pitch: 9,525 mm

gates

94410221904

94568

5463XS

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Balance shaft delete kit. Porsche 944 / 968

3609509441

Product Information

Balance shaft delete kit.

To help remove all the balance shaft belt and ancillary products on 944/968 which is only way to make the engine run smoother (After you’ve removed that stuff these bungs to plug up the holes on the engine, so it does leak from where the shafts used to be).

So, engine will still run without all that balance shaft belt and ancillary, maybe a bit rougher but will save a bit of engine power not having to drive all that stuff and engine weight. (Crankshaft/Camshaft timing is on a separate timing belt on 944/968)
Replacement Porsche part no 94410292300.

Fits:

Porsche 944S 2.5L 16V 1987-88 M44.40 engines
Porsche 924S 2.5L 1987-88 M44.10 engines
Porsche 944S2 3.0L 16V 1989-91 M44.41 engines
Porsche 944 Turbo 2.5L 8V 1987-91 M44.52 engines
Porsche 944 Turbo S 2.5L 8V 1988>> M44.52 engines
Porsche 968 3.0L 1992-94 M44.43 engines
Porsche 968 Sport 3.0L 1994-95 M44.43 engines
Porsche 968 CS 3.0L 1993-95 M44.43 engines
Porsche 968 Turbo S 3.0L 1993-94 M44.43 engines

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

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

3609509441

94410292300

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4 4 4 4

Belt tensioner tool for toothed belt. Porsche 924S / 944 86>>

7314

Product Information

Belt tensioner for toothed belt.
Made in Germany

nordschleife

Fits:
Porsche 924S 2.5L 1986-88
Porsche 944 2.5L / 2.7L 1986>>
Porsche 944 S2 3.0L
Porsche 944 Turbo 951 2.5L

Here you get a tool to adjust the belt tensioner of the timing belt on your Porsche 924S and 944 from 1986 onwards. With this tool the adjustment of the belt tension is also possible under narrow space conditions.

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

7314

7314

94410506714

94410506709

9441056119R

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Cam belt idler roller. Porsche 924S / 944 / 968

94410524104

Product Information

Cam idler roller.
porsche

46mm diameter – 28mm wide

Fits:
Porsche 924S 1986-88
Porsche 944 1983-89*
Porsche 944 S, 944 S2, 944 Turbo
Porsche 968 1992-95

*see Notes 2 & 3
Note 1: Also fits early 87 924S up to engine # 43H01919 (Manual Trans) & 43H60384 (Auto Trans)

Note 2: Also fits early 87 924S from engine # 43H01920 (Manual Trans) & 43H60385 (Auto Trans)

Note 3: Early cars (83-86) that have been updated to the later style waterpump with belt guard rail will use this roller.

Snap a timing belt on this type of motor and the valves stop opening and closing, but those pistons keep slamming up and down. Bent valves, broken lifters, even a broken camshaft could be the outcome! Keep the relationship between your pistons and valves civil by performing proper timing and balance shaft belt maintenance. Due to the complexity and options, please choose all of the parts that apply to your vehicle carefully.

Click 'Zoom in' for large parts diagram.
Diagram Ref No 6.

Related reference numbers
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94410524104

94410524104

94410524103

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3 3 3

Cam belt idler roller. Porsche 924S / 944 / 968

94410524104/1

Product Information

Cam idler roller, 46mm diameter – 28mm wide.
This is a high-quality cam-/timing-belt idler/guide roller designed to replicates the original manufacturer specifications for diameter, width, bearing quality. Cam idler roller maintaining correct belt tension and alignment so that the camshafts, crankshaft (and in balance-shaft applications) remain perfectly synchronised. If the idler becomes worn or seizes, the belt can deviate, skip teeth or fail, potentially leading to catastrophic engine damage.

Fits:
Porsche 924S 1986 - 1988
Porsche 944 1983 - 1989*
Porsche 944 S, 944 S2, 944 Turbo
Porsche 968 1992 - 1995

* see Notes 2 & 3
Note 1: Also fits early 87 924S up to engine # 43H01919 (Manual Trans) & 43H60384 (Auto Trans)
Note 2: Also fits early 87 924S from engine # 43H01920 (Manual Trans) & 43H60385 (Auto Trans)
Note 3: Early cars (83-86) that have been updated to the later style water pump with belt guard rail will use this roller.

Diagram ref no 6

• Position on Vehicle: his part mounts in the timing belt drive system (camshaft-belt/guide roller area) on the front of the engine block, often adjacent to the belt guard/rail for the water pump/temporal belt path.

• Applications: Timing belt drive systems in the above-listed Porsche models (924S, 944, 968). Suitable replacement when restoring or maintaining correct cam/ crank timing and belt drive reliability.

The timing belt idler roller plays a crucial role in maintaining precise belt alignment and smooth engine operation. Over time, the bearing can wear out or seize, risking belt failure and serious engine damage. Replacing the roller during scheduled maintenance ensures long-term reliability, quiet operation, and protection of vital engine components.

When and why to replace:
• Signs of wear, noise, or rough bearing movement.
• During timing belt or water-pump service for easy access and complete system refresh.
• Preventative maintenance on high-mileage or older vehicles with original rollers.
• To prevent costly repairs caused by belt misalignment or breakage.
• To restore smooth, quiet belt operation and consistent timing performance.

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

94410524104

94410524104

94410524103

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Cam belt idler roller. Porsche 944S / 968

94410524102

Product Information

Cam idler roller. Porsche 944S / 968

porsche

Fits:
Porsche 944S 1987-91
Porsche 968 1992-95

Click 'Zoom in' for large parts diagram.
Diagram Ref No 7.

Related reference numbers
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94410524102

94410524102

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3 3 3

Cam belt idler roller. Porsche 944S / 968

94410524102/1

Product Information

Cam Idler Roller.
The OE Match Cam Idler Roller is a high-quality replacement component designed to guide and support the engine's camshaft timing belt. As an integral part of the timing belt system, the idler roller helps maintain correct belt alignment and tension, ensuring precise synchronisation between the crankshaft and camshaft for optimal engine performance.

Fits:

Porsche 944S 2.5L 16V 1987-88
Porsche 968 3.0L 1992-94
Porsche 968 Sport 3.0L 1994-95
Porsche 968 CS 3.0L 1993-95
Porsche 968 Turbo S 3.0L 1993-94

Diagram Ref No 7

Manufactured to OE specifications for fit, function and durability, this cam idler roller is engineered to withstand high rotational speeds, engine heat and continuous operating loads. It is a recommended replacement during timing belt servicing, engine maintenance and timing system overhauls.

What This Product Does:

Guides and supports the timing belt during engine operation.
Maintains correct belt alignment throughout the timing system.
Helps reduce belt vibration and unwanted movement.
Promotes even timing belt wear.
Supports accurate camshaft and crankshaft synchronisation.
Contributes to reliable engine timing and smooth performance.

Symptoms Of Wear Or Failure:

Squealing, chirping or grinding noises from the timing belt area.
Excessive timing belt vibration.
Rough or noisy bearing operation.
Timing belt misalignment.
Uneven or accelerated timing belt wear.
Visible wear or damage to the roller surface.
Bearing play or looseness.
Increased risk of timing belt failure.

Why Replacement Matters:

The cam idler roller operates continuously whenever the engine is running and is subjected to constant rotational forces, temperature fluctuations and bearing loads. Over time, the internal bearing can wear, lubrication can degrade and the roller surface may become damaged.
A failing idler roller can compromise timing belt alignment, leading to increased belt wear and unnecessary stress on the timing system. In severe cases, bearing seizure or roller failure may result in timing belt damage or loss of engine timing, potentially causing expensive engine repairs.

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

94410524102

94410524102

532004810

17355

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DISPLAYING 17 to 32 (of 56 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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Belts / Tensioners / Rollers

Belts / Tensioners / Rollers