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Dorman M630586 Brake Master Cylinder
Dorman M630586 Brake Master Cylinder
Dorman M630586 is a brake master cylinder built for specific 2007-2008 Honda Fit applications that use a 7/8 in. bore size and drum brake wheel cylinders. It is engineered to match the original master cylinder’s design, function, and performance, with new aluminum construction and an included reservoir for a direct replacement on the correct vehicle configuration.
Key Features
- Direct replacement brake master cylinder for select Honda Fit models
- 0.875 in. bore diameter for the specified brake system
- Aluminum master cylinder body for durable service
- Reservoir included
- Two outlets with M10 x 1.0 rearward outlet thread size
- Sensor included
- Part number M630586 for ordering and cross-reference
Detailed Description
This brake master cylinder is designed for 2007-2008 Honda Fit vehicles equipped with drum brake wheel cylinders requiring a 7/8 in. bore size brake master cylinder. Dorman M630586 follows the original equipment layout closely, with two outlets, a 10 mm secondary outlet thread diameter, and a rearward outlet size of M10 x 1.0. The aluminum housing and new materials support a clean replacement for worn or leaking hydraulic components. This part cross-references Centric Parts 130.40067 for the same application.
What It Helps Fix
- Brake pedal travel that feels excessive or inconsistent
- External brake fluid leaks at the master cylinder
- Loss of hydraulic pressure in the brake system
- Soft or spongy brake pedal response
- Brake warning concerns related to master cylinder wear
Installation Notes and Tips
Confirm the vehicle is a 2007-2008 Honda Fit and verify the brake system uses the specified 7/8 in. bore requirement before ordering. This master cylinder includes a reservoir and sensor, but mounting hardware is not included. Bench bleeding the master cylinder before installation and bleeding the full brake system afterward helps restore proper hydraulic performance. Match all outlet thread sizes and line routing to the original unit during replacement.
Quality Assurance
Dorman manufactures this master cylinder as a precision-engineered replacement built from new, high-quality materials to mirror the original part’s design and function. It is intended as a safe, durable replacement for the specified Honda Fit brake hydraulic application. Part number M630586 is also referenced by Raybestos Brakes MC391000 and Quality-Built NM55345 for the same fitment.
| Brand | Dorman |
|---|---|
| Part Number | M630586 |
| Mounting Hardware Included | No |
| Master Cylinder Bore Diameter | 0.875 |
| Master Cylinder Material | Aluminum |
| Reservoir Included | Yes |
| Secondary Outlet Thread Diameter | 10 |
| Sensor Included | Yes |
| Number of Outlets | 2 |
| Package Contents | Master cylinder |
| Rearward Outlet Size | M10 x 1.0 |
| Thread Pitch | 1.0 |
This part fits 2 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2008 | Honda | Fit | N/A | Fits drum brake wheel cylinders requiring 7/8" bore size brake master cylinder. |
| 2007 | Honda | Fit | N/A | Fits drum brake wheel cylinders requiring 7/8" bore size brake master cylinder. |
* 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.