OE Quality
60-Day Returns

Dorman CM39931 Clutch Master Cylinder
Reliable Clutch Master Cylinder for Chevrolet, Geo, and Toyota Vehicles
The Dorman CM39931 clutch master cylinder is designed as a standard replacement part for manual transmission systems. Engineered with a 0.625-inch bore diameter, this component ensures consistent hydraulic pressure for smooth clutch operation in select Chevrolet, Geo, and Toyota models.
- Standard replacement grade for dependable performance
- 0.625-inch bore diameter optimized for precise hydraulic control
- Compatible with Chevrolet, Geo, and Toyota manual transmission vehicles
- Includes clutch master cylinder component only
- Part number CM39931 for accurate identification and fitment
Product Details and Specifications
The Dorman CM39931 clutch master cylinder features a 0.625-inch bore diameter, which is critical for maintaining the correct hydraulic pressure within the clutch system. This standard replacement part is manufactured to meet OEM specifications, providing reliable engagement and disengagement of the clutch. It is designed specifically for manual transmission applications in Chevrolet, Geo, and Toyota vehicles, including models such as the Toyota Corolla and Geo Prizm. The precise bore size helps ensure consistent pedal feel and clutch responsiveness.
Compatible Vehicles and Common Applications
This clutch master cylinder is compatible with manual transmission systems in the following vehicles:
- Chevrolet models requiring a 0.625-inch bore clutch master cylinder
- Geo Prizm manual transmission vehicles
- Toyota Corolla models with matching clutch system specifications
It addresses issues such as clutch pedal sponginess, difficulty shifting gears, and hydraulic fluid leaks that can occur in aging or worn clutch master cylinders.
Installation Notes and Tips
- Ensure the hydraulic system is properly bled after installation to remove air pockets
- Verify the bore diameter matches the vehicle’s original specifications before replacement
- Inspect related clutch components for wear during installation to prevent future issues
- Use appropriate tools to avoid damage to the cylinder or surrounding parts
Quality Assurance and Warranty
Dorman manufactures the CM39931 clutch master cylinder to meet industry standards for durability and performance. This part is a standard replacement grade component designed to provide reliable service life. Please refer to Dorman’s warranty policy for specific coverage details.
| Brand | Dorman |
|---|---|
| Part Number | CM39931 |
| Bore Diameter | 0.625 |
| Item Grade | Standard replacement |
| Package Contents | Clutch master cylinder |
This part fits 27 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2002 | Chevrolet | Prizm | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 2002 | Toyota | Corolla | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 2001 | Chevrolet | Prizm | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 2001 | Toyota | Corolla | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 2000 | Chevrolet | Prizm | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 2000 | Toyota | Corolla | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 1999 | Chevrolet | Prizm | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 1999 | Toyota | Corolla | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 1998 | Chevrolet | Prizm | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 1998 | Toyota | Corolla | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 1997 | Geo | Prizm | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 1997 | Toyota | Corolla | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 1996 | Geo | Prizm | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 1996 | Toyota | Corolla | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 1995 | Geo | Prizm | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 1995 | Toyota | Corolla | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 1994 | Geo | Prizm | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 1994 | Toyota | Corolla | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 1993 | Geo | Prizm | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 1993 | Toyota | Corolla | 1.6L | L4 | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 1993 | Toyota | Corolla | 1.8L | L4 | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 1992 | Geo | Prizm | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 1992 | Toyota | Corolla | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 1991 | Geo | Prizm | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 1991 | Toyota | Corolla | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. | ||
| 1990 | Geo | Prizm | N/A | From VIN LZ090311; Bore: 5/8 In. | ||
| 1990 | Toyota | Corolla | N/A | Compatible 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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.