Convert brake-pedal force into hydraulic pressure for your braking system with the Dorman First Stop Brake Master Cylinder M71258, a new cast iron master cylinder supplied with its reservoir. It fits many Chrysler, Dodge and Plymouth vehicles, among them the 1967-1970 Dodge Charger, 1967-1968 Chrysler 300 and 1969-1974 Dodge W100 Pickup, as a direct-fit replacement for the listed applications with all engines.
Dorman precision-engineers this master cylinder to match the original unit's design, function and performance. It is built from new, high-quality materials as a safe, durable replacement.
- Precise replacement: the cylinder housing is made to match the casting material of the original part for similar performance.
- Durable design: every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: made entirely of new materials.
- Strict specifications: built to meet rigorous SAE International standards.
Specifications: cast iron construction, 1-inch bore, two outlets and a 1/2-20 rearward outlet size. The reservoir is included. Mounting hardware and a sensor are not included. The listed applications use one master cylinder per vehicle. Country of origin: China. See the "Vehicles it fits" section for the full list of fitting vehicles.
Interchange: 783-32009 · 83-32009 · 100-2374 · M-83009 · 13-1323 · 10-1323 · 10-1323M · 130.63009 · 131.63009 · 355-39005
78332009 · 8332009 · 1002374 · M83009 · 131323 · 101323 · 101323M · 13063009 · 13163009 · 35539005 · M900085 · 11323 · 2808577 · 2808599 · MC501310 · 5472965 · 71258 · M1323 · NM1323 · MC36221 · F71258 · MC71258
This part cross-references / interchanges with the following part numbers:
783-32009, 83-32009, M900085, 100-2374, M-83009, 11323, 13-1323, 10-1323, 10-1323M, 130.63009, 131.63009, 2808577, 2808599, MC501310, 355-39005, 5472965, 71258, M1323, NM1323, MC36221, F71258, MC71258
Frequently Asked Questions
What does a brake master cylinder do?
It converts force from the brake pedal into hydraulic pressure and sends brake fluid through its outlets to the brake system. The Dorman M71258 has a 1-inch bore and two outlets.
Is this the right master cylinder for a 1967-1968 Chrysler 300?
The M71258 is listed as a direct-fit replacement for the 1967-1968 Chrysler 300 with all engines, one per vehicle. Check the "Vehicles it fits" section to confirm your exact vehicle.
What is included in the box?
The package contains the master cylinder with its reservoir. Mounting hardware and a sensor are not included, so consult the vehicle service information for the correct fasteners.
What are signs a master cylinder may need replacing?
A soft or sinking brake pedal, fluid leaking around the master cylinder, or a dropping fluid level may be signs. Other brake parts can cause these symptoms, so diagnose the system before replacing.
What are the key specifications of the M71258?
It has cast iron construction, a 1-inch bore, two outlets and a 1/2-20 rearward outlet size. Its rubber components use an EPDM compound that resists glycol-based brake fluid.
