Luk LMC391 Clutch Master Cylinder

Clutch Master Cylinder for Subaru Manual Transmissions

LuK LMC391 is a new clutch master cylinder for Subaru manual transmission applications. It is built for drivers replacing a worn hydraulic clutch component on select Subaru Baja, Legacy, Outback, Forester, and Impreza models from 1999-2006.

• New clutch master cylinder for hydraulic clutch release systems
• Includes push rod
• Installation instructions included
• Pre-filled fluid: No
• Pre-bled system: No
• Heat shield included: No
• Clutch slave cylinder not included

OE-Style Hydraulic Clutch Replacement

LuK has extensive experience in hydraulic clutch release systems, and that background is reflected in this replacement master cylinder. The LMC391 is intended for Subaru vehicles that rely on a hydraulic clutch pedal circuit, helping restore consistent clutch actuation when the original master cylinder is leaking, sticking, or losing pressure. This part cross-references Dorman - First Stop CM640038 for the same application. Fits 2003-2006 Subaru Baja, 2000-2004 Subaru Legacy, 2000-2004 Subaru Outback, 1999-2002 Subaru Forester, and 1999-2001 Subaru Impreza.

Common Problems This Part Can Address

• Soft or sinking clutch pedal feel
• Hydraulic fluid leakage at the master cylinder
• Difficulty disengaging the clutch
• Inconsistent clutch pedal engagement point
• Loss of hydraulic pressure in the clutch release system

Installation Notes

Installation instructions are included. Because this clutch master cylinder is not pre-filled or pre-bled, the hydraulic system must be filled and bled after installation. Verify the push rod connection, inspect the clutch hydraulic line and related seals, and confirm proper pedal travel before returning the vehicle to service. Fits 2003-2006 Subaru Baja, 2000-2004 Subaru Legacy, 2000-2004 Subaru Outback, 1999-2002 Subaru Forester, and 1999-2001 Subaru Impreza.

Quality Assurance

LuK, part of Schaeffler, brings long-standing engineering experience in clutch release systems and hydraulic clutch components. Part number LMC391 is a new replacement component built for manual transmission service on the listed Subaru applications.