Drive belt idler pulley deflection roller. Porsche 955 / 957 / 958 Cayenne  ❭  95510227600

Drive belt idler pulley deflection roller.
This pulley supports and guides the serpentine/accessory belt to maintain proper routing and tension, ensuring it runs smoothly over various engine accessories without slipping or misalignment.

Fits:
Porsche 955 Cayenne 3.2L 2004>> (M02.2Y)

Porsche 957 Cayenne 3.6L 2007 - 2010 (Engine code: 5501)
M >> 638 08942
M 63A 03027 >>
M 63A 05020 >>

Porsche 958 Cayenne 3.6L 2010 - 18 (Engine code: 5502, CEYA)
M >> B 06770
M >> B 06811

Diagram ref no 7

This idler pulley provides a smooth, correctly aligned surface for the accessory drive belt (serpentine belt) to run over, ensuring proper routing and tension as it drives vital systems such as the alternator, air conditioning compressor, power steering pump, and water pump (as fitted). It keeps belt motion steady and prevents slipping, vibration, or premature wear in the belt system.

A worn, noisy, or seized idler pulley can cause the accessory drive belt to:
• Slip or squeal
• Wear prematurely
• Mis-track off pulley grooves
• Lead to loss of accessory function (e.g., alternator charging, power steering assist, air conditioning)

Replacing a failing pulley restores smooth belt travel, helps reduce noise under the hood, and improves the belt’s service life.

Replace this idler pulley if you notice:
•  Squealing or chirping from the front accessory belt area
•  Belt wear or fraying
•  Vibration or noise from the pulley bearing
•  During belt system maintenance or tensioner replacement

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95510227600

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