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Product Information
Product Information
Clutch Master Cylinder.
Restore smooth, consistent clutch operation with this Valeo Clutch Master Cylinder. Valeo is a recognised Original Equipment supplier of automotive hydraulic and clutch components, producing high-quality replacement parts designed for accurate fit, dependable hydraulic pressure, and long service life.

Fits:
For 6-speed manual transmission for all-wheel drive vehicle (option code: G0L)
  • Porsche 955 Cayenne 3.2L V6 2003-06
  • Porsche 955 Cayenne S 4.5L V8 2003-06
  • Porsche 955 Cayenne Turbo 4.5L 2003-06
  • Porsche 955 Cayenne Turbo S 4.5L 2006>>
  • Porsche 957 Cayenne 3.0L Diesel 2007-10
  • Porsche 957 Cayenne 3.6L 2007-10
  • Porsche 957 Cayenne S / GTS 4.8L 2007-10
  • Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10  

Diagram Ref No 1

The clutch master cylinder is a key component of the vehicle's hydraulic clutch system. When the clutch pedal is pressed, the master cylinder converts pedal movement into hydraulic pressure. This pressure travels through the clutch hydraulic lines to the slave cylinder, which operates the clutch release mechanism and disengages the clutch from the engine, allowing smooth gear selection.

What This Product Does:
  • Converts clutch pedal movement into hydraulic pressure.
  • Supplies hydraulic pressure to the clutch slave cylinder.
  • Enables the clutch release mechanism to disengage the clutch.
  • Helps provide smooth and consistent clutch pedal operation.
  • Supports clean and reliable gear selection.
  • Maintains pressure within the clutch hydraulic circuit.
  • Replaces a leaking, worn, sticking, or failed master cylinder.
  • Provides an OE-quality fit for compatible applications.

Symptoms Of Wear Or Failure:
  • Clutch pedal feeling soft or spongy.
  • Clutch pedal slowly sinking towards the floor.
  • Clutch pedal remaining on or near the floor.
  • Pedal failing to return normally after being pressed.
  • Inconsistent clutch pedal pressure.
  • Difficulty selecting or changing gears.
  • Clutch failing to disengage completely.
  • Vehicle creeping with the clutch pedal fully depressed.
  • Grinding when selecting gears.
  • Visible hydraulic fluid leakage around the master cylinder.
  • Falling clutch/brake fluid level where a shared reservoir is used.
  • Repeated need to bleed the clutch hydraulic system.

Why Replacement Matters:

  • The clutch master cylinder is responsible for generating the hydraulic pressure required to operate the clutch. If its internal seals become worn or damaged, pressure can bypass internally even when there is no obvious external fluid leak. This may result in a clutch pedal that feels soft, gradually sinks, or fails to operate the clutch consistently.
  • Loss of hydraulic pressure can prevent the clutch from disengaging fully, making gear selection difficult and potentially causing grinding during shifts. Continued operation with incomplete clutch disengagement may place unnecessary strain on gearbox synchronisers and other clutch or transmission components.
  • External leakage can also lower the hydraulic fluid level and allow air into the system, further reducing clutch performance. Where the clutch and braking systems share a fluid reservoir, any unexplained fluid loss should be investigated promptly.
  • Replacing a worn or failed unit with this Valeo Clutch Master Cylinder restores dependable hydraulic pressure, consistent clutch pedal response, and smooth clutch disengagement. Manufactured to Valeo's high-quality standards, this master cylinder provides accurate fit, reliable hydraulic performance, and long-term durability for Porsche clutch maintenance and repair.



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