HomeTransmission > Manual Transmission ComponentsLuk LMC643 Clutch Master Cylinder
Part #: LMC643

Luk LMC643 Clutch Master Cylinder

⚙️ 9 vehicles fit this part
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Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$132.75Free Shipping
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✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Subaru, Impreza
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Luk Clutch Master Cylinder LMC643 for Subaru Impreza

The Luk Clutch Master Cylinder LMC643 is designed specifically for Subaru Impreza models, providing reliable manual transmission performance. This new clutch master cylinder comes with essential components to facilitate installation and ensure proper function.

  • Compatible with Subaru Impreza manual transmission systems
  • Includes push rod for direct installation
  • Installation instructions included for ease of setup
  • New part, ensuring durability and performance
  • Does not include clutch slave cylinder or heat shield
  • Requires manual bleeding as it is not pre-bled or pre-filled

Product Details and Specifications

The Luk LMC643 clutch master cylinder is a new replacement part engineered for Subaru Impreza vehicles equipped with manual transmissions. It includes a push rod to connect the clutch pedal mechanism directly, simplifying the installation process. While the product does not come pre-filled with fluid or pre-bled, it includes detailed installation instructions to guide through the necessary steps. This part does not include a clutch slave cylinder or heat shield, so those components must be sourced separately if needed. The absence of a pre-bled system means that proper bleeding of the hydraulic system is required to ensure optimal clutch operation.

Common Applications and Problem Resolution

  • Restores clutch hydraulic pressure for smooth gear shifting
  • Replaces worn or leaking clutch master cylinders causing pedal sponginess
  • Eliminates clutch engagement issues due to master cylinder failure
  • Addresses fluid leaks that reduce clutch system efficiency
  • Improves clutch pedal feel and responsiveness in Subaru Impreza manual transmissions

Installation Notes and Tips

Installation instructions are included with the Luk LMC643 clutch master cylinder to assist with proper setup. The included push rod must be correctly adjusted to ensure proper clutch pedal travel. Since the unit is not pre-filled or pre-bled, it is important to thoroughly bleed the clutch hydraulic system after installation to remove air and prevent clutch engagement problems. The absence of a heat shield means care should be taken to avoid exposure to excessive engine heat during installation.

Quality Assurance and Warranty Information

This Luk clutch master cylinder is a new, OEM-quality replacement part designed to meet or exceed original equipment specifications for Subaru Impreza manual transmissions. While specific warranty details are not provided, Luk parts typically come with manufacturer-backed quality assurance to ensure reliable performance and durability.

This part fits 9 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersPositionNotes
2011SubaruImpreza2.5i2.5LH4N/A
2011SubaruImpreza2.5i Premium2.5LH4N/A
2011SubaruImprezaOutback Sport2.5LH4N/A
2010SubaruImpreza2.5i Premium2.5LH4N/A
2010SubaruImprezaOutback Sport2.5LH4N/A
2009SubaruImpreza2.5i2.5LH4N/A
2009SubaruImprezaOutback Sport2.5LH4N/A
2008SubaruImpreza2.5i2.5LH4N/AFrom 02/21/2008
2008SubaruImprezaOutback Sport2.5LH4N/AFrom 02/21/2008

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

37230FG020511058310072643729829CM640185SH5530

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.