Dorman CM640063 Clutch Master Cylinder
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Dorman

Dorman CM640063 Clutch Master Cylinder

Brand Dorman CM640063
Bore Diameter 0.625
Item Grade Standard replacement
Outlet Thread Size M10 x 1.0
Package Contents Clutch master cylinder
Port Thread Diameter 10
Fits Scion and Toyota · 12 vehicles

Direct replacement. Precision-engineered to match original equipment design.

Standard replacement. A dependable clutch master cylinder for restoring hydraulic function.

0.625 bore diameter. Sized for consistent clutch pedal response.

Cross-references AMS Automotive M1633, BBB Industries 13976 and Beck/Arnley 072-9563 for the same application. See all 11.

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Dorman CM640063 Clutch Master Cylinder

The Dorman CM640063 clutch master cylinder is a direct replacement for specific Toyota and Scion manual transmission applications. It is precision-engineered to match the original equipment design, helping restore consistent hydraulic clutch operation when the original unit is leaking or no longer functioning correctly.

Key Features

  • Direct replacement clutch master cylinder for select manual transmission vehicles
  • OE-style design for proper fit and hydraulic function
  • 0.625 bore diameter for the specified application
  • Standard replacement grade for everyday repair use
  • M10 x 1.0 outlet thread size and 10 mm port thread diameter
  • Fits 2000-2005 Toyota Echo, N/A
  • Fits 2004-2006 Scion xA, N/A
  • Fits 2004-2006 Scion xB, N/A

Detailed Description

Built for specific vehicle years, makes, and models, this clutch master cylinder is intended to replace a leaking or malfunctioning original unit without changing the factory hydraulic layout. The Dorman CM640063 uses a 0.625-inch bore and M10 x 1.0 outlet thread sizing, making it a focused replacement for the listed Toyota Echo and Scion xA/xB applications. If you are searching for a clutch master cylinder for 2000-2005 Toyota Echo or a clutch master cylinder for 2004-2006 Scion xB, this part number provides the correct OE-style fitment for those vehicles.

This part cross-references Beck/Arnley 072-9563 and LuK LMC389 for the same application.

What It Helps Fix

  • Clutch pedal that loses hydraulic pressure
  • Fluid leakage at the master cylinder
  • Difficulty disengaging the clutch
  • Soft or inconsistent clutch pedal feel
  • Hydraulic clutch operation affected by internal wear

Installation Notes and Tips

Verify the bore diameter, outlet thread size, and vehicle fitment before installation. This clutch master cylinder is listed for N/A position applications and should be matched to the exact year, make, and model shown. After installation, bleed the hydraulic system thoroughly to remove air and confirm proper pedal operation. For best results, inspect the related hydraulic components and replace any worn lines or seals as needed.

Quality Assurance

Dorman manufactures this part as a standard replacement component engineered to match original equipment design for the specified applications. The CM640063 is built to support reliable clutch hydraulic performance in the listed Toyota and Scion vehicles.

Related reading

This part fits 12 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2006ScionxAN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2006ScionxBN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2005ScionxAN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2005ScionxBN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2005ToyotaEchoN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2004ScionxAN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2004ScionxBN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2004ToyotaEchoN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2003ToyotaEchoN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2002ToyotaEchoN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2001ToyotaEchoN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2000ToyotaEchoN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
Directly replaces or cross-references 11 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
AMS Automotive — M1633BBB Industries — 13976Beck/Arnley — 072-9563Centric Parts — 136.44005LuK — LMC3893501383142052010CM141841CM452430CMA350138CMT-055