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Chains & Tensioners
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06

Fits:
Porsche 955 Cayenne S 4.5L 2003-06
Porsche 955 Cayenne Turbo 4.5L 2003-06
Click 'Zoom in' for large parts diagram.
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94810518002
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06

Fits:
Porsche 955 Cayenne S 4.5L 2003-06
Porsche 955 Cayenne Turbo 4.5L 2003-06
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Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94810518101
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06

Fits:
Porsche 955 Cayenne S 4.5L 2003-06
Porsche 955 Cayenne Turbo 4.5L 2003-06
Contains
1x 94810516902
1x 94810725200
1x 94810506821
1x 94810506502
1x 94810518002
2x 94810516602
1x 94810502302
2x 94810518101
1x 94810725101
1x 94810702501
1x 94810223102
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Diagram ref no 1
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Related, superseded, cross reference or alternative numbers for comparison.
94810516902
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06

Fits:
Porsche 955 Cayenne S 4.5L 2003-06
Porsche 955 Cayenne Turbo 4.5L 2003-06
Click 'Zoom in' for large parts diagram.
Diagram ref no 5
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Related, superseded, cross reference or alternative numbers for comparison.
94810506502
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
No of links - 224

Fits:
Porsche 955 Cayenne S 4.5L 2003-06
Porsche 955 Cayenne Turbo 4.5L 2003-06
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Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94810516902
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
No of Links - 224
Fits:
Porsche 955 Cayenne S 4.5L 2003-06
Porsche 955 Cayenne Turbo 4.5L 2003-06
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94810516902
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06

Fits:
Porsche 955 Cayenne S 4.5L 2003-06
Porsche 955 Cayenne Turbo 4.5L 2003-06
Click 'Zoom in' for large parts diagram.
Diagram ref no 10
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Related, superseded, cross reference or alternative numbers for comparison.
94810502302
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06

Fits:
Porsche 955 Cayenne S 4.5L 2003-06
Porsche 955 Cayenne Turbo 4.5L 2003-06
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Diagram ref no 2
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94810506821
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06

Fits:
Porsche 955 Cayenne S 4.5L 2003-06
Porsche 955 Cayenne Turbo 4.5L 2003-06
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Diagram ref no 9
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94810516614
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
Fits:
Porsche 955 Cayenne S 2003-06
Porsche 955 Cayenne Turbo 2003-06
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Diagram ref no 10
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94810725101
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06

Fits:
Porsche 955 Cayenne S 2003-06
Porsche 955 Cayenne Turbo 2003-06
Click 'Zoom in' for large parts diagram.
Diagram ref no 4
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94810223102
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
Fits:
Porsche 955 Cayenne S 2003-06
Porsche 955 Cayenne Turbo 2003-06
Diagram ref no 4
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94810223102
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
Fits:
Porsche 955 Cayenne S 2003-06
Porsche 955 Cayenne Turbo 2003-06
Diagram ref no 7
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94810725200
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
The IWIS Oil Pump Drive Chain is a replacement internal engine drive chain for compatible Porsche applications. Its purpose is to transmit mechanical drive to the engine oil pump, allowing the pump to circulate lubricating oil throughout the engine while it is running.
Fits:
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
Diagram Ref No 7
Reliable operation of the oil pump drive is critical to engine durability. If the chain becomes excessively worn, elongated, loose or damaged, oil pump operation can be compromised. Loss of effective oil circulation or oil pressure can rapidly cause serious damage to bearings, camshafts, crankshaft surfaces and other internal engine components.
What This Product Does:
The oil pump drive chain transfers rotational movement from the engine's drive system to the oil pump.
Once driven, the oil pump draws engine oil from the sump and circulates it through the lubrication system to critical internal components.
The drive chain therefore helps support:
- Reliable oil pump operation
- Engine oil circulation
- Correct lubrication of internal components
- Protection of bearings and rotating assemblies
- Lubrication of timing and valvetrain components
- Heat removal from lubricated surfaces
- Reliable engine operation
Although the chain does not create oil pressure itself, it provides the mechanical drive required for the oil pump to operate.
Symptoms Of Wear Or Failure:
Oil pump drive chains are designed for extended service life, but they can deteriorate through mechanical wear, lubrication problems or failure of associated components.
Possible symptoms include:
- Rattling or mechanical noise from the chain area
- Excessive chain slack
- Chain elongation
- Visible wear or damage during engine inspection
- Worn chain links
- Abnormal wear on associated sprockets
- Low oil-pressure warning
- Oil-pressure related diagnostic faults
- Abnormal engine noise associated with inadequate lubrication
- Metal debris found in the engine oil or filter
Some chain problems may produce few obvious symptoms before becoming serious, making careful inspection important whenever the relevant area of the engine is accessible.
Why Replacement Matters:
The oil pump drive chain performs a critical role in maintaining engine lubrication.
Replacing a confirmed worn or damaged IWIS Oil Pump Drive Chain helps:
- Restore reliable mechanical drive to the oil pump
- Maintain dependable oil circulation
- Reduce excessive chain movement
- Correct problems associated with chain elongation
- Protect associated sprockets and drive components
- Support reliable engine lubrication
- Reduce the risk of oil pump drive failure
- Help protect expensive internal engine components
Because lubrication is essential whenever the engine is operating, deterioration of the oil pump drive should be addressed promptly.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94810725200
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
Fits:
Porsche 955 Cayenne S 2003-06
Porsche 955 Cayenne Turbo 2003-06
Click 'Zoom in' for large parts diagram.
Diagram ref no 6
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94810702501
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Precision Timing Chains & Tensioners – Engine Synchronisation and Reliability for Porsche Models
The timing chain system is one of the most critical components of a Porsche engine, ensuring perfect synchronisation between the crankshaft and camshafts. This precise coordination allows valves to open and close at the right moment, maintaining smooth power delivery, fuel efficiency, and long-term engine health.
At Design911, we supply a comprehensive range of precision-engineered timing chains, guides, and hydraulic tensioners designed to meet or exceed manufacturer performance standards. Each component is manufactured from high-strength materials for exceptional wear resistance and durability — vital for high-revving, performance-oriented Porsche engines.
What Do Timing Chains and Tensioners Do?
A timing chain connects the crankshaft to the camshafts, ensuring accurate valve timing. The tensioner keeps the chain taut to prevent slack, vibration, or noise, maintaining precise timing under all load conditions.
Core Functions:
- Synchronise engine timing between the camshaft and crankshaft.
- Maintain valve timing accuracy for optimal combustion and power.
- Prevent chain slack and noise through hydraulic or spring-loaded tensioning.
- Ensure long-term reliability in both performance and everyday driving.
Together, these components preserve the exacting standards of Porsche engine operation — vital for both power and longevity.
Why Do Timing Chains and Tensioners Fail?
Over time, wear, oil degradation, and heat cycles can cause timing components to deteriorate. When neglected, they may stretch, seize, or lose tension — leading to severe engine damage.
Common Causes of Failure Include:
- Chain stretch or elongation, resulting in timing misalignment.
- Worn or leaking hydraulic tensioners, causing chain rattle on start-up.
- Contaminated or degraded engine oil, accelerating wear.
- Broken chain guides from heat stress or material fatigue.
- Insufficient oil pressure, reducing hydraulic tensioner performance.
A failing timing chain system can lead to poor performance, rough idling, check-engine lights, or — in extreme cases — catastrophic valve-to-piston contact.
Why Replace with Performance-Grade Timing Components?
Replacing aging timing components with manufacturer-quality parts ensures reliable valve timing, smoother operation, and peace of mind.
Key Benefits:
- Restores precise valve timing for peak performance and efficiency.
- Prevents engine noise and vibration caused by chain slack.
- Protects against catastrophic engine damage due to chain failure.
- Constructed from heat-treated, high-grade steel for long service life.
- Engineered to match original timing profiles for Porsche engines.
- Perfect fitment for classic air-cooled and modern water-cooled models.
Whether performing preventive maintenance or a complete rebuild, these timing chains and tensioners deliver race-ready reliability with road-tested durability.
Highlights:
- Precision-engineered timing chains, guides, and tensioners for Porsche engines.
- Restores timing accuracy and eliminates start-up rattle or misfire issues.
- Built from heat-treated alloy steel for maximum longevity.
- Hydraulic and mechanical tensioners available for various Porsche models.
- Ideal for performance rebuilds and preventative maintenance.
- Compatible with air-cooled and water-cooled Porsche engines.