Dorman CM640208 Clutch Master Cylinder

Clutch Master Cylinder for Mazda MX-5 Miata

This Dorman clutch master cylinder is a direct replacement for select Mazda MX-5 Miata models. It is precision-engineered to match the original equipment design for a reliable manual transmission repair on 2006-2012 Mazda MX-5 Miata applications.

• Direct replacement clutch master cylinder for manual transmission service
• Cast iron body with black finish
• Piston-style cylinder design
• 0.625 bore diameter
• Single remote reservoir type; reservoir not included
• 1 outlet with M10 x 1.0 outlet thread size
• Standard replacement grade

Detailed Product Overview

Dorman CM640208 is built for drivers replacing a leaking or malfunctioning clutch master cylinder in a Mazda MX-5 Miata. The cast iron construction and OE-style design support consistent hydraulic clutch operation, while the piston cylinder layout and 0.625 bore diameter match the original application requirements. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application. Use CM640208 when servicing 2006-2012 Mazda MX-5 Miata manual transmission systems that require a direct-fit clutch master cylinder replacement.

Common Problems This Part Can Address

• Clutch fluid leaking from the master cylinder
• Soft or inconsistent clutch pedal feel
• Difficulty disengaging the clutch
• Hydraulic pressure loss in the clutch system
• Wear-related failure in the original master cylinder

Installation Notes and Tips

Verify the vehicle’s year, make, and model before installation. This clutch master cylinder uses a single remote reservoir setup and is not pre-bled or pre-filled, so the hydraulic system must be serviced and bled after installation. Confirm the M10 x 1.0 outlet thread size and the 0.625 bore diameter match the original part before replacing the unit on your Mazda MX-5 Miata.

Quality Assurance

Dorman designs this replacement to match the original equipment layout for the listed Mazda MX-5 Miata applications. Part number CM640208 is intended as a standard replacement for manual transmission clutch hydraulic service.