Dorman CM640187 Clutch Master Cylinder

Clutch Master Cylinder for Subaru Impreza

Dorman CM640187 is a standard replacement clutch master cylinder for specific Subaru Impreza applications. It is precision-engineered to match the original equipment design, helping restore consistent hydraulic clutch operation when the original unit is leaking or malfunctioning.

Built for 2008-2011 Subaru Impreza models, this replacement part supports direct-fit service for manual transmission repairs. The CM640187 is also a practical cross-reference for Beck/Arnley 072-9845 and OE-style application 37230FG030.

Key Features

• Standard replacement clutch master cylinder
• Direct replacement design for OE-style fit and function
• Outlet thread size: M10 x 1.0
• Port thread diameter: 10
• Package contents: clutch master cylinder
• Fits 2008 Subaru Impreza, from 3/08
• Fits 2009-2011 Subaru Impreza

Detailed Description

The Dorman CM640187 clutch master cylinder is engineered to match the original equipment layout used on select Subaru Impreza manual transmission vehicles. For drivers searching for a clutch master cylinder for 2009-2011 Subaru Impreza or a replacement clutch master cylinder for 2008 Subaru Impreza from 3/08, this part provides the correct thread specifications and OE-style design needed for a proper hydraulic connection. The part number CM640187 is a direct replacement option for service work where the original master cylinder has begun to leak, lose pressure, or operate inconsistently.

This part cross-references Beck/Arnley 072-9845 and OE-style application 37230FG030 for the same application.

Common Issues This Part May Address

• Clutch fluid leaking from the master cylinder
• Soft or inconsistent clutch pedal feel
• Difficulty disengaging the clutch
• Loss of hydraulic pressure in the clutch system
• Manual transmission shifting problems related to clutch actuation

Installation Notes and Tips

Verify vehicle fitment by year and build date before installation. This clutch master cylinder is listed for 2008 Subaru Impreza from 3/08 and 2009-2011 Subaru Impreza applications. Confirm thread size and port diameter match the original unit before connecting hydraulic lines. After installation, bleed the clutch hydraulic system thoroughly to remove air and restore pedal consistency.

Quality Assurance

Dorman designs this clutch master cylinder as a direct replacement for specific original equipment applications, with dimensions and connection points matched to the factory design for reliable service on Subaru Impreza manual transmission vehicles.