HomeTransmission > Manual Transmission ComponentsDorman CM640056 Clutch Master Cylinder
Part #: CM640056

Dorman CM640056 Clutch Master Cylinder

⚙️ 12 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Hyundai and Kia, Optima and Sonata
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Reliable Clutch Master Cylinder for Hyundai and Kia Vehicles

The Dorman CM640056 clutch master cylinder is designed to provide consistent hydraulic pressure for smooth clutch operation. Engineered with a 0.625-inch bore diameter, this standard replacement part is compatible with select Hyundai and Kia models, including the Optima and Sonata.

Key Features of the Dorman CM640056 Clutch Master Cylinder

  • Standard replacement grade for dependable performance
  • 0.625-inch bore diameter optimized for precise hydraulic control
  • Compatible with Hyundai Optima and Kia Sonata manual transmission systems
  • Includes clutch master cylinder component only
  • Manufactured by Dorman, a trusted name in automotive replacement parts

Detailed Product Description

The Dorman CM640056 clutch master cylinder is engineered to restore proper clutch function in manual transmission systems. Its 0.625-inch bore diameter ensures accurate hydraulic pressure transfer, which is critical for smooth clutch engagement and disengagement. This part serves as a direct replacement for worn or damaged clutch master cylinders in Hyundai Optima and Kia Sonata models, maintaining the integrity of the vehicle's clutch hydraulic system.

Common Applications and Problem Resolution

  • Restores clutch pedal responsiveness and travel
  • Eliminates clutch slippage caused by hydraulic failure
  • Prevents fluid leaks that can lead to clutch disengagement issues
  • Addresses spongy or soft clutch pedal feel
  • Resolves difficulty in shifting gears due to hydraulic pressure loss

Installation Notes and Tips

When installing the Dorman CM640056 clutch master cylinder, ensure the hydraulic system is properly bled to remove air pockets for optimal clutch performance. Verify compatibility with your Hyundai Optima or Kia Sonata model year before installation. Use appropriate tools to avoid damage to the bore and seals during replacement.

Quality Assurance and Warranty Information

Dorman manufactures the CM640056 clutch master cylinder to meet or exceed OEM specifications for durability and fitment. This part is backed by Dorman's standard warranty, providing confidence in its reliability and performance for manual transmission repairs.

BrandDorman
Part NumberCM640056
Bore Diameter0.625
Item GradeStandard replacement
Package ContentsClutch master cylinder

This part fits 12 vehicles. Search below:

YearMakeModelPositionNotes
2005HyundaiSonataN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2005KiaOptimaN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2004HyundaiSonataN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2004KiaOptimaN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2003HyundaiSonataN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2003KiaOptimaN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2002HyundaiSonataN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2002KiaOptimaN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2001HyundaiSonataN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2001KiaOptimaN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2000HyundaiSonataN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
1999HyundaiSonataN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.

* 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:

072-9418136.51001136563501854161038110CM140122CM1414CM450160CMA350185LMC381M0538

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