Dorman - First Stop Brake Master Cylinder M630039
Dorman - First Stop Brake Master Cylinder M630039 - view 2
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Dorman - First Stop Brake Master Cylinder M630039
Dorman - First Stop Brake Master Cylinder M630039 - view 2
Dorman - First Stop Brake Master Cylinder M630039 - view 3
Dorman - First Stop Brake Master Cylinder M630039 - view 4

Dorman - First Stop Brake Master Cylinder P/N:M630039

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$202.99
MPN: M630039
UPC: 885484083035
Item Package Quantity: 1
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Dorman - First Stop Brake Master Cylinder P/N:M630039
Dorman - First Stop Brake Master Cylinder P/N:M630039
$202.99

Turn brake-pedal effort into the hydraulic pressure that operates the brakes with the Dorman - First Stop Brake Master Cylinder (MPN M630039). It drops in as a direct-fit replacement for the 2005-2007 Ford F-250, F-350, F-450, and F-550 Super Duty (All engines), and is precision-built to match the design, function, and performance of the original master cylinder on those applications.

  • Precise replacement: the aluminum cylinder housing is constructed to match the casting material of the original part for similar performance.
  • Durable design: all rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
  • 100% new: made entirely of new materials, not remanufactured.
  • Strict specifications: made to meet rigorous SAE International standards.

A 1.5 in bore feeds four outlets — a rearward outlet sized M10 x 1.0 and a secondary outlet threaded M12 x 1.0 & 3/8-24. The reservoir and fluid-level sensor are included; mounting hardware is not, so consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: Taiwan. If a failing master cylinder is the cause of a slowly sinking or spongy pedal or a fluid leak at the cylinder, this unit replaces it — diagnose the cause before replacing.

Interchange: 100-4275 · 1004275 · 13-3254 · 133254 · 10-3254 · 103254 · 130.65101 · 355-54217 · 35554217 · 5C3Z2140HA · NM4116 · BRMC-25 · BRMC25 · MC390956 · MWMMC900093
Manufacturer part number M630039.

This part cross-references / interchanges with the following part numbers:

100-4275, 13-3254, 10-3254, 130.65101, 355-54217, 5C3Z2140HA, NM4116, BRMC-25, MC390956, MWMMC900093

Frequently Asked Questions

Which vehicles does this master cylinder fit?

It is a direct-fit replacement for the 2005-2007 Ford F-250, F-350, F-450, and F-550 Super Duty (All engines). Check the Buyer's Guide tab to confirm fitment for your vehicle.

What comes with the master cylinder?

The package contains the master cylinder with its reservoir and fluid-level sensor included. Mounting hardware is not included; consult the service information for the correct fasteners.

What are the bore and outlet specs?

It has a 1.5 in bore and four outlets: a rearward outlet sized M10 x 1.0 and a secondary outlet threaded M12 x 1.0 & 3/8-24.

What is it made of?

The cylinder housing is aluminum, constructed to match the casting material of the original part, and all rubber components use a high-quality EPDM compound. It is 100% new, not remanufactured.

What are signs the master cylinder may need replacing?

A brake pedal that slowly sinks to the floor, a spongy pedal, or fluid leaking at the cylinder can be signs. Diagnose the cause before replacing, as other parts can produce these symptoms.

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