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Dorman M630304 Brake Master Cylinder
Reliable Brake Master Cylinder for Chrysler and Dodge Vehicles
The Dorman M630304 brake master cylinder is engineered to restore proper brake hydraulics in select Chrysler and Dodge models. Designed with precision, this aluminum master cylinder includes a reservoir and sensor to ensure consistent brake performance for your Caravan, Grand Caravan, Pacifica, Town & Country, or Voyager.
- Master cylinder bore diameter: 1 inch for accurate hydraulic pressure
- Constructed from durable aluminum material for corrosion resistance
- Includes reservoir and sensor for integrated brake fluid management
- Two outlets with M12 x 1.0 thread size for secure brake line connections
- Compatible with Chrysler and Dodge minivans including Caravan, Grand Caravan, Pacifica, Town & Country, and Voyager
- Part number M630304 ensures exact fit and function
Product Details and Specifications
The Dorman M630304 brake master cylinder is designed to meet the specific hydraulic requirements of Chrysler and Dodge minivans. Its 1-inch bore diameter provides the necessary pressure to operate the braking system effectively. Made from aluminum, this master cylinder offers enhanced durability and resistance to corrosion compared to traditional cast iron units. The included reservoir and sensor allow for seamless integration with the vehicle’s brake fluid system, ensuring accurate fluid level monitoring and brake responsiveness. Featuring two outlets with M12 x 1.0 thread pitch, this master cylinder supports secure and leak-free connections to the brake lines.
Compatible Vehicles and Applications
This brake master cylinder is compatible with the following vehicles:
- Chrysler Caravan
- Chrysler Grand Caravan
- Chrysler Pacifica
- Chrysler Town & Country
- Dodge Voyager
Use part number M630304 to confirm compatibility with your specific model and year.
Common Issues Addressed by This Master Cylinder
- Spongy or unresponsive brake pedal
- Brake fluid leaks from the master cylinder
- Brake warning light activation due to sensor failure
- Reduced braking efficiency or uneven brake pressure
- Contaminated or low brake fluid levels in the reservoir
Installation Notes and Tips
- Ensure the brake system is properly bled after installation to remove air pockets
- Verify that the sensor connector is securely attached to maintain brake fluid monitoring
- Use compatible brake fluid as specified by the vehicle manufacturer
- Inspect brake lines and fittings for wear or damage during installation
- Mounting hardware is not included; reuse existing hardware or source separately
Quality Assurance and Warranty
Dorman manufactures the M630304 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction and integrated sensor contribute to reliable brake system performance. While mounting hardware is not included, the part is designed for direct replacement in compatible Chrysler and Dodge minivans. Please consult Dorman’s warranty policy for specific coverage details.
| Brand | Dorman |
|---|---|
| Part Number | M630304 |
| Master Cylinder Bore Diameter | 1 |
| Master Cylinder Material | Aluminum |
| Mounting Hardware Included | No |
| Number of Outlets | 2 |
| Package Contents | Master Cylinder |
| Rearward Outlet Size | M12 X 1.0 |
| Reservoir Included | Yes |
| Secondary Outlet Thread Diameter | M12 X 1.0 |
| Sensor Included | Yes |
| Thread Pitch | 1.0 |
This part fits 19 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2007 | Chrysler | Town & Country | N/A | Compatible with 1-inch bore drum brake wheel cylinders. |
| 2007 | Dodge | Caravan | N/A | Compatible with 1-inch bore drum brake wheel cylinders. |
| 2007 | Dodge | Grand Caravan | N/A | Compatible with 1-inch bore drum brake wheel cylinders. |
| 2006 | Chrysler | Pacifica | N/A | Compatible with 1-inch bore drum brake wheel cylinders. |
| 2006 | Chrysler | Town & Country | N/A | Compatible with 1-inch bore drum brake wheel cylinders. |
| 2006 | Dodge | Caravan | N/A | Compatible with 1-inch bore drum brake wheel cylinders. |
| 2006 | Dodge | Grand Caravan | N/A | Compatible with 1-inch bore drum brake wheel cylinders. |
| 2005 | Chrysler | Pacifica | N/A | Fits vehicles equipped with Traction Control and a 1" bore size. |
| 2005 | Chrysler | Town & Country | N/A | Fits vehicles equipped with Traction Control and a 1" bore size. |
| 2005 | Dodge | Caravan | N/A | Fits vehicles equipped with Traction Control and a 1" bore size. |
| 2005 | Dodge | Grand Caravan | N/A | Fits vehicles equipped with Traction Control and a 1" bore size. |
| 2004 | Chrysler | Pacifica | N/A | Fits vehicles equipped with Traction Control and a 1" bore size. |
| 2004 | Chrysler | Town & Country | N/A | Fits vehicles equipped with Traction Control and a 1" bore size. |
| 2004 | Dodge | Caravan | N/A | Fits vehicles equipped with Traction Control and a 1" bore size. |
| 2004 | Dodge | Grand Caravan | N/A | Fits vehicles equipped with Traction Control and a 1" bore size. |
| 2003 | Chrysler | Town & Country | N/A | Fits vehicles equipped with Traction Control and a 1" bore size. |
| 2003 | Chrysler | Voyager | N/A | Fits vehicles equipped with Traction Control and a 1" bore size. |
| 2003 | Dodge | Caravan | N/A | Fits vehicles equipped with Traction Control and a 1" bore size. |
| 2003 | Dodge | Grand Caravan | N/A | Fits vehicles equipped with Traction Control and a 1" 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.