HomeTransmission > Manual Transmission ComponentsLuk LMC646 Clutch Master Cylinder
Part #: LMC646

Luk LMC646 Clutch Master Cylinder

⚙️ 18 vehicles fit this part
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Select your vehicle to confirm fitment
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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
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Reliable Clutch Master Cylinder for Subaru Impreza

The Luk LMC646 clutch master cylinder is designed specifically for Subaru Impreza models, providing precise hydraulic control for manual transmissions. This new part ensures consistent clutch engagement and smooth shifting performance.

  • Includes installation instructions for straightforward replacement
  • Comes with a push rod for complete assembly
  • Does not include a heat shield or clutch slave cylinder
  • New, unused component for reliable operation
  • Requires manual bleeding as it is not pre-bled or pre-filled

Product Details and Specifications

The Luk LMC646 clutch master cylinder is engineered to meet OEM standards for Subaru Impreza manual transmission systems. This component is supplied as a new part and includes a push rod to facilitate proper clutch pedal actuation. While it does not come pre-filled with fluid or pre-bled, the included installation instructions provide guidance for proper setup. The absence of a heat shield and clutch slave cylinder means this part is intended to replace only the master cylinder portion of the clutch hydraulic system.

Compatible Vehicles and Applications

This clutch master cylinder is compatible with Subaru Impreza models requiring a manual transmission component replacement. It is designed to restore hydraulic pressure for clutch disengagement, improving pedal feel and transmission shifting reliability.

  • Eliminates clutch pedal sponginess or failure to disengage
  • Resolves hydraulic fluid leaks from the master cylinder
  • Addresses clutch engagement issues caused by worn or damaged master cylinder
  • Prevents clutch drag and gear grinding during shifts

Installation Notes and Tips

Installation of the Luk LMC646 clutch master cylinder includes detailed instructions to assist with proper mounting and connection. Since the unit is not pre-filled or pre-bled, it is important to bleed the clutch hydraulic system thoroughly after installation to remove air and ensure optimal performance. The included push rod should be adjusted to the correct length to maintain proper pedal travel and clutch engagement.

Quality Assurance and Warranty

As a new part from Luk, the LMC646 clutch master cylinder meets strict manufacturing standards for durability and fitment. While specific warranty details may vary, Luk products typically come with a limited warranty covering defects in materials and workmanship to provide confidence in your purchase.

This part fits 18 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersPositionNotes
2013SubaruImprezaWRX2.5LH4N/ATo 12/31/2012
2013SubaruImprezaWRX Limited2.5LH4N/ATo 12/31/2012
2013SubaruImprezaWRX Premium2.5LH4N/ATo 12/31/2012
2012SubaruImprezaWRX Limited2.5LH4N/A
2012SubaruImprezaWRX2.5LH4N/A
2012SubaruImprezaWRX STI2.5LH4N/ATo 03/01/2012
2012SubaruImprezaWRX STI Limited2.5LH4N/ATo 03/01/2012
2011SubaruImprezaWRX STI2.5LH4N/A
2011SubaruImprezaWRX STI Limited2.5LH4N/A
2011SubaruImprezaWRX2.5LH4N/A
2011SubaruImprezaWRX Premium2.5LH4N/A
2011SubaruImprezaWRX Limited2.5LH4N/A
2010SubaruImprezaWRX STI2.5LH4N/A
2010SubaruImprezaWRX STI Special Edition2.5LH4N/A
2009SubaruImprezaWRX STI2.5LH4N/A
2009SubaruImprezaWRX2.5LH4N/A
2008SubaruImprezaWRX STI2.5LH4N/A
2008SubaruImprezaWRX2.5LH4N/A

* 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:

136.470137230FG010511058110072646729845M1508M1510SH5531

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