Dorman CM640099 Clutch Master Cylinder

Dorman CM640099 Clutch Master Cylinder

Dorman CM640099 is a direct replacement clutch master cylinder for manual transmission service on select Saturn Ion models. It is built to match original equipment design details for a straightforward replacement when the factory unit is leaking or no longer operating correctly.

Compatible With 2003-2007 Saturn Ion applications, this clutch master cylinder is a standard replacement with an external cylinder design and a 0.625 bore diameter. The aluminum construction and black/silver finish support a clean OE-style appearance for Saturn Ion clutch hydraulic repairs.

Key Features

• Direct replacement for the original clutch master cylinder
• Fits 2003-2007 Saturn Ion, N/A
• Aluminum body with black and silver finish
• External cylinder type for manual transmission clutch hydraulic systems
• 0.625 bore diameter
• Reservoir not included
• Pre-bled/pre-filled: No
• Part number CM640099 for identification and ordering

Detailed Description

This Dorman clutch master cylinder is engineered to match the OE design used on specific Saturn Ion model years, helping restore clutch hydraulic function after a leak, internal wear, or loss of pressure. The standard replacement construction is intended for direct service on manual transmission components, and the aluminum housing provides a durable replacement format for the original unit. If you are searching for a Saturn Ion clutch master cylinder replacement, CM640099 is a fitment-specific option for 2003-2007 vehicles.

This part cross-references Centric Parts 136.62030 for the same application.

Common Issues It May Solve

• Clutch pedal sinking or failing to return properly
• Visible hydraulic fluid leakage at the master cylinder
• Difficulty disengaging the clutch during shifting
• Loss of clutch hydraulic pressure
• Soft or inconsistent clutch pedal feel

Installation Notes and Tips

Verify the vehicle year and manual transmission application before installation. This unit is external and does not include a reservoir, and it is not pre-bled or pre-filled, so the hydraulic system must be serviced accordingly after installation. Confirm line routing, mounting points, and bore size match the original part before final assembly.

Quality Assurance

Dorman manufactures this clutch master cylinder as a standard replacement part designed to follow original equipment design requirements for the listed Saturn Ion applications. Part number CM640099 is intended for direct replacement service on 2003-2007 Saturn Ion manual transmission clutch hydraulic systems.