Luk LSC421 Clutch Slave Cylinder

LuK LSC421 Clutch Slave Cylinder

The LuK LSC421 clutch slave cylinder is a hydraulic transmission component for manual clutch release systems. It is listed for Mazda 3 and Mazda 5 applications, giving you a direct replacement option when the original slave cylinder is leaking, sticking, or no longer maintaining proper clutch release pressure.

Key Features

• Hydraulic clutch slave cylinder for manual transmission systems
• Fits 2004-2013 Mazda 3
• Fits 2006-2010 Mazda 5
• Fits 2012-2015 Mazda 5
• LuK part number LSC421 for application matching
• OE-style replacement from a brand with clutch release system expertise

Product Details

LuK has been part of the transition from mechanical to hydraulic clutch release systems and brings long-term experience in complete clutch release system development. The LSC421 is built for manual transmission service where consistent hydraulic actuation is needed for smooth clutch disengagement. This part cross-references Sachs SH6237 for the same application.

Common Repair Reasons

• Clutch pedal feels soft or inconsistent
• Hydraulic fluid leakage at the slave cylinder
• Difficulty fully disengaging the clutch
• Gear engagement problems during shifting
• Reduced clutch release performance in Mazda 3 or Mazda 5 models

Installation Notes

Verify the vehicle year, engine, and transmission details before ordering. Hydraulic clutch components should be inspected for fluid contamination, air in the system, and wear in related release parts during service. After installation, the hydraulic system should be bled according to the vehicle service procedure to restore proper pedal feel and clutch release.

Quality Assurance

LuK is recognized for its work in hydraulic clutch release system development and complete clutch release system engineering. The LSC421 is a direct-fit style replacement for listed Mazda applications and is backed by LuK manufacturing expertise.