Luk LMC643 Clutch Master Cylinder

Clutch Master Cylinder for Subaru Impreza

This LuK clutch master cylinder is a new hydraulic replacement for manual transmission Subaru Impreza models. It is built for 2008-2011 Subaru Impreza applications and includes the push rod and installation instructions for a more straightforward service.

Key Features

• Brand: LuK
• Part number: LMC643
• New part construction
• Push rod included
• Installation instructions included
• Not pre-filled with fluid
• Not pre-bled
• Supplied without clutch slave cylinder

Product Details

LuK has extensive experience in hydraulic clutch release systems, and this clutch master cylinder reflects that focus on manual transmission service parts. The LMC643 is a direct-fit hydraulic component for Subaru Impreza models from 2008 through 2011, including 2008 Impreza built from 02/21/2008. It is a practical replacement when the original master cylinder shows internal wear, fluid leakage, or inconsistent clutch pedal operation. This part cross-references Dorman First Stop CM640185 for the same application.

Common Issues This Part Can Address

• Soft or spongy clutch pedal feel
• Difficulty disengaging the clutch
• Hydraulic fluid leakage at the master cylinder
• Inconsistent pedal return or engagement point
• Loss of clutch hydraulic pressure

Installation Notes and Tips

Fits 2008-2011 Subaru Impreza, N/A. Because this unit is not pre-filled or pre-bled, the hydraulic system must be filled and bled after installation. The included push rod and installation instructions help support a proper replacement process. Verify the vehicle build date for the 2008 Subaru Impreza application, since coverage begins on 02/21/2008. Confirm the existing clutch hydraulic layout before installation.

Quality Assurance

LuK is part of Schaeffler and has long-standing expertise in clutch release systems, including the transition from mechanical to hydraulic designs. Part number LMC643 is a new replacement component built for manual transmission service on Subaru Impreza applications.