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- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
- Porsche 970.1 Panamera S V8 4.8L 2009-13
- Porsche 970.1 Panamera 4S V8 4.8L 2009-13
- Porsche 970.1 Panamera GTS V8 4.8L 2011-13
- Porsche 970.1 Panamera Turbo V8 4.8L 2009-13
- Porsche 970.1 Panamera Turbo S V8 4.8L 2009-13
The OE Match Alternator Pulley is a replacement pulley designed for selected Porsche Cayenne and Panamera models.
Fits:- Porsche 955 Cayenne S 4.L 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 957 Cayenne 4.8L V8 2007-10
- Porsche 957 Cayenne 4.8L Turbo 2007-10
- Porsche 970 Panamera S / GTS / TURBO 2010-13
Diagram Ref No 7
Mounted to the alternator shaft, the pulley allows the auxiliary drive belt to transfer rotational power from the engine to the alternator. As the engine runs, the pulley rotates the alternator so it can generate electrical power for the vehicle and maintain battery charge.
The pulley must remain correctly aligned with the auxiliary belt and surrounding drive components. Wear, physical damage, corrosion or incorrect alignment can cause belt noise, vibration and reduced drive efficiency, potentially affecting alternator performance and other components within the auxiliary belt system.
What This Product Does:
The alternator pulley forms the mechanical connection between the engine's auxiliary drive belt and the alternator.
Its functions include:
- Transferring rotational drive from the engine to the alternator.
- Allowing the alternator to operate whenever the engine is running.
- Supporting correct battery charging.
- Helping power the vehicle's electrical systems.
- Maintaining the correct drive-belt path.
- Supporting consistent belt alignment.
- Providing a smooth rotational surface for the auxiliary belt.
- Helping maintain efficient power transfer through the accessory-drive system.
- Replacing a worn, corroded or damaged original pulley.
- Supporting correct alternator operation after drive-system repairs.
Without reliable mechanical drive from the belt, the alternator cannot produce the electrical output required by the vehicle.
Symptoms Of Wear Or Failure:
Possible symptoms include:
- Squealing from the auxiliary drive belt.
- Chirping noises from the belt area.
- Abnormal rattling or mechanical noise around the alternator.
- Visible pulley damage.
- Excessive corrosion.
- Pulley wobble while the engine is running.
- Belt running out of alignment.
- Uneven belt wear.
- Fraying along the belt edges.
- Belt slipping.
- Excessive vibration in the auxiliary drive.
- Premature belt tensioner wear.
- Premature idler pulley wear.
- Battery warning light illuminating.
- Reduced charging-system output.
- Battery repeatedly becoming discharged.
- Vehicle electrical systems behaving unpredictably due to low system voltage.
- Complete loss of alternator drive in severe cases.
These symptoms can also result from a worn drive belt, tensioner, alternator bearings, idler pulley or electrical charging fault, so the complete system should be inspected during diagnosis.
Why Replacement Matters:
The alternator pulley operates continuously whenever the engine is running.
It is subjected to:
- High rotational speed.
- Constant belt tension.
- Engine vibration.
- Repeated acceleration and deceleration.
- Engine-bay temperatures.
- Long-term mechanical wear.
If its condition deteriorates, the auxiliary belt may no longer run smoothly or remain correctly aligned.
Replacing a worn pulley helps restore:
- Correct alternator drive.
- Consistent belt alignment.
- Efficient rotational power transfer.
- Reliable battery charging.
- Smooth auxiliary-drive operation.
- Reduced belt noise.
- Reduced risk of premature belt wear.
- Reliable operation of the vehicle's electrical system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94860312501
The product you are viewing cross references to these numbers
- Porsche 957 Cayenne 3.6L 2007-10
- Porsche 95B.2 Macan S Petrol 3.0L V6 (354Bhp) 2019-21
Fits:
Porsche 957 Cayenne 3.6ltr - 02/07 to 12/10
Porsche 95B MK2 Macan S 3.0ltr V6 - 02/19>>
Diagram ref no 21
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
021903119M
The product you are viewing cross references to these numbers