Dorman CM640047 Clutch Master Cylinder

Dorman CM640047 Clutch Master Cylinder

Dorman CM640047 is a standard replacement clutch master cylinder built to match the original equipment design for specific BMW manual transmission applications. With a 19 mm bore diameter, it is a direct-fit solution for restoring clutch hydraulic function on select BMW Z3, 318ti, 323i, 323is, 328is, M3, 318i, and 328i models.

Key Features

• 19 mm bore diameter for the specified BMW clutch hydraulic setup
• Standard replacement grade for OE-style fit and function
• Direct replacement design for select manual transmission vehicles
• Package contents: clutch master cylinder
• Part number CM640047 for easy identification and ordering

Detailed Description

This Dorman clutch master cylinder is engineered as a direct replacement for the original unit used in specific BMW years and models. It is designed to match the OE layout and hydraulic requirements of the application, helping restore consistent clutch pedal operation and hydraulic pressure transfer in manual transmission systems. This part cross-references Beck/Arnley 072-9548 for the same application.

Compatible With 1998-2002 BMW Z3, N/A; 1998-1999 BMW 318ti, N/A; 1999 BMW 323i, N/A; 1998-1999 BMW 323is, N/A; 1998-1999 BMW 328is, N/A; 1999 BMW M3, N/A; 1998 BMW 318i, N/A; and 1998 BMW 328i, N/A. If you are searching for a BMW clutch master cylinder replacement, BMW Z3 clutch master cylinder, or a Dorman CM640047 for BMW manual transmission repair, this part is built for those exact applications.

What It Helps Fix

• Clutch pedal that sinks or feels inconsistent
• Hydraulic fluid leakage at the master cylinder
• Difficulty disengaging the clutch
• Loss of hydraulic pressure in the clutch system
• Wear-related failure of the original clutch master cylinder

Installation Notes and Tips

Verify the 19 mm bore diameter and confirm vehicle fitment before installation. This part is intended for the listed BMW applications only, so match the year, model, and manual transmission setup carefully. Inspect the clutch hydraulic system for leaks, air in the lines, or worn related components during replacement to help ensure proper operation after installation.

Quality Assurance

Dorman manufactures this CM640047 clutch master cylinder as a precision-engineered replacement for the original equipment design in the listed applications. It is supplied as a standard replacement part for dependable fitment on select BMW models.