Dorman - First Stop Brake Master Cylinder M390391
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Dorman - First Stop Brake Master Cylinder M390391
Dorman - First Stop Brake Master Cylinder M390391 - view 2
Dorman - First Stop Brake Master Cylinder M390391 - view 3
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Dorman - First Stop Brake Master Cylinder P/N:M390391

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$123.99
MPN: M390391
Item Package Quantity: 1
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Dorman - First Stop Brake Master Cylinder P/N:M390391
Dorman - First Stop Brake Master Cylinder P/N:M390391
$123.99

Convert brake-pedal effort into the hydraulic pressure that operates the vehicle's brake circuits with the Dorman - First Stop Brake Master Cylinder (M390391). It drops in as a direct-fit replacement for the 1997-1998 Ford E-350 Econoline [All] and 1997-1998 Ford Econoline Super Duty [All], and it's precision-engineered to the design, function, and performance of the original master cylinder on those listed applications.

  • Specs: aluminum housing with a 1.25 in bore and two outlets, including a 7/16-24 rearward outlet.
  • 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, and built to meet rigorous SAE International standards.
  • Precise replacement: the cylinder housing is built to match the casting material of the original part for comparable performance.

This master cylinder includes the reservoir and a sensor. 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 the cause of a sinking or spongy pedal, this unit replaces it; diagnose the cause before replacing. Country of origin: Taiwan.

Interchange: 18M811 · 83-42051 · 8342051 · M901046 · 100-2502 · 1002502 · M-85051 · M85051 · 13280 · 13284 · 13497 · 13-2797 · 132797 · 10-2797 · 102797 · 130.65051 · 130.65093 · 131.65093 · MC252250 · F7UZ2140EB · NM3032 · BRMC-46 · BRMC46 · MC390391 · F140661 · MC140661 · Manufacturer part number M390391.

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

18M811, 83-42051, M901046, 100-2502, M-85051, 13280, 13284, 13497, 13-2797, 10-2797, 130.65051, 130.65093, 131.65093, MC252250, F7UZ2140EB, NM3032, BRMC-46, MC390391, F140661, MC140661

Frequently Asked Questions

Which vehicles does the M390391 master cylinder fit?

It's a direct-fit replacement for the 1997-1998 Ford E-350 Econoline [All] and 1997-1998 Ford Econoline Super Duty [All]. Check the Buyer's Guide tab to confirm your vehicle.

Does it come with a reservoir and sensor?

Yes. Per the catalog, this master cylinder includes the reservoir and a sensor.

Is mounting hardware included?

No—mounting hardware is not included. Consult the vehicle service information for the correct fasteners and whether they may be reused.

Is this new or remanufactured?

It's 100% new, made entirely of new materials—not remanufactured—and built to meet SAE International standards.

What are the key specifications?

It has an aluminum housing, a 1.25 in bore, and two outlets including a 7/16-24 rearward outlet. The rubber components use an EPDM compound resistant to glycol-based brake fluid.

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