Dorman - First Stop Brake Master Cylinder M390338
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Dorman - First Stop Brake Master Cylinder M390338
Dorman - First Stop Brake Master Cylinder M390338 - view 2
Dorman - First Stop Brake Master Cylinder M390338 - view 3
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Dorman - First Stop Brake Master Cylinder P/N:M390338

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$107.99
MPN: M390338
Item Package Quantity: 1
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Dorman - First Stop Brake Master Cylinder P/N:M390338
Dorman - First Stop Brake Master Cylinder P/N:M390338
$107.99

Convert brake-pedal force into the hydraulic pressure that operates your brakes with the Dorman - First Stop Brake Master Cylinder M390338. It installs as a direct-fit replacement for the 1996-1999 Ford F-250, the 1997 Ford F-250 HD, and the 1996-1997 Ford F-350 (All engines), and is precision-built to match the design, function, and performance of the original unit on the listed applications.

  • Aluminum housing: the cylinder housing is cast to match the casting material of the original part for similar performance.
  • EPDM rubber components: all rubber parts use a high-quality EPDM compound for resistance to glycol-based brake fluid.
  • 100% new: made entirely of new materials — not remanufactured — and built to meet rigorous SAE International standards.
  • Ready to fit: includes the reservoir and sensor, with a 1.25 in bore and 3 outlets (7/16-24 rearward outlet; 9/16-18 & 3/8-24 secondary outlet threads).

Mounting hardware is not included — consult the vehicle service information for the correct fasteners and whether they may be reused. If a worn or leaking master cylinder is behind a sinking or spongy pedal, this replaces it. Country of origin: China.

Interchange: 18M781 · 83-42054 · 8342054 · M901011 · M-85054 · M85054 · 13263 · 13-2828 · 132828 · 10-2828 · 102828 · 130.65054 · 13065054 · 131.65054 · 13165054 · MC250370 · 355-54173 · 35554173 · F6TZ2140FA · F6TZ2140FB · F75Z2140HC · F75Z2140HE · F75Z2140HF · MC390338 · F140083 · MC140083 · Manufacturer part number M390338.

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

18M781, 83-42054, M901011, M-85054, 13263, 13-2828, 10-2828, 130.65054, 131.65054, MC250370, 355-54173, F6TZ2140FA, F6TZ2140FB, F75Z2140HC, F75Z2140HE, F75Z2140HF, MC390338, F140083, MC140083

Frequently Asked Questions

What does this brake master cylinder do?

It converts the force from your brake pedal into hydraulic pressure that operates the vehicle's brakes, using glycol-based brake fluid.

Which vehicles does the M390338 fit?

It's a direct-fit replacement for the 1996-1999 Ford F-250, the 1997 Ford F-250 HD, and the 1996-1997 Ford F-350 (All engines). Check the Buyer's Guide tab to confirm your vehicle.

Does it include the reservoir and sensor?

Yes. Per the catalog, both the reservoir and the sensor are included. Mounting hardware is not included.

Is it new or remanufactured?

It's 100% new, made entirely of new materials rather than remanufactured, and built to meet rigorous SAE International standards.

What are its key specifications?

It has an aluminum housing, a 1.25 in bore, and 3 outlets: a 7/16-24 rearward outlet and 9/16-18 & 3/8-24 secondary outlet threads.

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