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Dorman M134440 Brake Master Cylinder
Reliable Brake Master Cylinder for Chrysler and Dodge Vehicles
The Dorman M134440 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 vehicles like the Chrysler 300M, Concorde, Intrepid, and LHS.
Key Features of the Dorman M134440 Brake Master Cylinder
- Master cylinder bore diameter: 0.938 inches for accurate hydraulic pressure
- Constructed from durable aluminum material for corrosion resistance
- Includes reservoir for fluid storage and sensor for system monitoring
- Two outlets with rearward outlet size M12 x 1.0 and secondary outlet thread diameter 10 mm
- Thread pitch of 1.0 ensures secure fitting
- Package contains the master cylinder only; mounting hardware not included
Detailed Product Description
This Dorman brake master cylinder (part number M134440) is designed specifically for Chrysler and Dodge vehicles including the 300M, Concorde, Intrepid, and LHS models. The aluminum construction provides strength and resistance to corrosion, extending the service life of the component. The 0.938-inch bore diameter is calibrated to deliver precise hydraulic pressure to the braking system. Equipped with a reservoir and sensor, this master cylinder supports fluid management and brake system monitoring, which are critical for safe vehicle operation. The two outlet ports, including a rearward outlet sized M12 x 1.0 and a secondary outlet with a 10 mm thread diameter, facilitate proper brake line connections. The 1.0 thread pitch ensures compatibility with OEM brake lines.
Common Applications and Issues Addressed
- Restores brake hydraulic pressure in Chrysler 300M, Concorde, Intrepid, and LHS
- Replaces master cylinders with worn or damaged bores causing brake fluid leaks
- Resolves brake pedal sponginess due to internal seal failure
- Addresses brake warning light activation related to sensor faults
- Improves brake fluid reservoir integrity to prevent contamination and air ingress
Installation Notes and Tips
- Ensure brake system is properly bled after installation to remove air pockets
- Verify compatibility with vehicle model and year before installation
- Use appropriate brake fluid as specified by the vehicle manufacturer
- Mounting hardware is not included; reuse existing hardware or source separately
- Inspect brake lines and fittings for wear or damage during installation
Quality Assurance and Warranty Information
Dorman manufactures this brake master cylinder to meet or exceed OEM specifications for fit, form, and function. The aluminum construction and integrated sensor contribute to reliable brake system performance. While mounting hardware is not included, the product undergoes quality checks to ensure durability and proper operation. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.
| Brand | Dorman |
|---|---|
| Part Number | M134440 |
| Master Cylinder Bore Diameter | 0.938 |
| 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 | 10 |
| Sensor Included | Yes |
| Thread Pitch | 1.0 |
This part fits 23 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2004 | Chrysler | 300M | N/A | Exc. Heavy Duty Brakes; Bore: 15/16 In. |
| 2004 | Chrysler | Concorde | N/A | Exc. Heavy Duty Brakes; Bore: 15/16 In. |
| 2004 | Dodge | Intrepid | N/A | Exc. Heavy Duty Brakes; Bore: 15/16 In. |
| 2003 | Chrysler | 300M | N/A | Exc. Heavy Duty Brakes; Bore: 15/16 In. |
| 2003 | Chrysler | Concorde | N/A | Exc. Heavy Duty Brakes; Bore: 15/16 In. |
| 2003 | Dodge | Intrepid | N/A | Exc. Heavy Duty Brakes; Bore: 15/16 In. |
| 2002 | Chrysler | 300M | N/A | Exc. Heavy Duty Brakes; Bore: 15/16 In. |
| 2002 | Chrysler | Concorde | N/A | Exc. Heavy Duty Brakes; Bore: 15/16 In. |
| 2002 | Dodge | Intrepid | N/A | Exc. Heavy Duty Brakes; Bore: 15/16 In. |
| 2001 | Chrysler | 300M | N/A | Fits 15/16" bore size drum brakes on multiple vehicle models. |
| 2001 | Chrysler | Concorde | N/A | Fits 15/16" bore size drum brakes on multiple vehicle models. |
| 2001 | Chrysler | LHS | N/A | Fits 15/16" bore size drum brakes on multiple vehicle models. |
| 2001 | Dodge | Intrepid | N/A | Fits 15/16" bore size drum brakes on multiple vehicle models. |
| 2000 | Chrysler | 300M | N/A | Fits 15/16" bore size drum brakes on multiple vehicle models. |
| 2000 | Chrysler | Concorde | N/A | Fits 15/16" bore size drum brakes on multiple vehicle models. |
| 2000 | Chrysler | LHS | N/A | Fits 15/16" bore size drum brakes on multiple vehicle models. |
| 2000 | Dodge | Intrepid | N/A | Fits 15/16" bore size drum brakes on multiple vehicle models. |
| 1999 | Chrysler | 300M | N/A | Fits 15/16" bore size drum brakes on multiple vehicle models. |
| 1999 | Chrysler | Concorde | N/A | Fits 15/16" bore size drum brakes on multiple vehicle models. |
| 1999 | Chrysler | LHS | N/A | Fits 15/16" bore size drum brakes on multiple vehicle models. |
| 1999 | Dodge | Intrepid | N/A | Fits 15/16" bore size drum brakes on multiple vehicle models. |
| 1998 | Chrysler | Concorde | N/A | Fits 15/16" bore size drum brakes on multiple vehicle models. |
| 1998 | Dodge | Intrepid | N/A | Fits 15/16" bore size drum brakes on multiple vehicle models. |
* 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.