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Dorman M390332 Brake Master Cylinder with 15/16 In. Bore OE Replacement

(1973-1981 Cadillac DeVille; 1973-1978, 1980-1981 Cadillac Eldorado; 1980-1981 Cadillac Seville Base/Elegante; 1973-1984 Cadillac Fleetwood + 3 more models)

Part of: Dorman Brake Master Cylinder Replacement

Other options in this family: Dorman M39298 Dorman M19012 Dorman M390139 Dorman M630735 Dorman M390200

Manufacturer

Picture for manufacturer Dorman

Part Number

M390332
8 reviews
Sale Price

$105.50

In Stock (5)

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Usually delivered within 2 days

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Product Details

The Dorman M390332 is a 100% new, direct-fit replacement brake master cylinder featuring a 15/16-inch bore. Engineered to restore proper hydraulic braking pressure, this unit is built to match the original equipment design in form, fit, and function — giving you a confident, straightforward swap without modifications.

Unlike remanufactured alternatives, this master cylinder is made entirely from new materials, ensuring consistent performance and long-term durability from day one. The cylinder housing is constructed to match the casting material of the original part, while all rubber components use high-quality EPDM compound for excellent resistance to glycol-based brake fluids.

Key Features:

  • 15/16 In. Bore — matches OE specifications for proper brake system hydraulics
  • 100% New Construction — not remanufactured, for maximum reliability and safety
  • OE-Match Housing — cylinder housing casting material mirrors the original part for precise fitment
  • EPDM Rubber Seals — high-quality compound resists degradation from DOT 3 and DOT 4 glycol-based brake fluids
  • SAE Compliant — manufactured to meet rigorous SAE International standards

The Dorman M390332 brake master cylinder is a dependable, cost-effective solution for restoring full braking performance. Sold as a single unit.

Products specifications

Fits

1973-1981 Cadillac DeVille; 1973-1978, 1980-1981 Cadillac Eldorado; 1980-1981 Cadillac Seville Base/Elegante; 1973-1984 Cadillac Fleetwood; 1975-1984 Cadillac Commercial Chassis Base; 1973-1976 Cadillac Calais Base; 1995-1996 Mazda Protege

Feature - Benefit 1

Cylinder housing is constructed from high-quality cast iron or aluminum for long-lasting durability

Feature - Benefit 2

All rubber components are of high-quality EPDM compound for resistance to glycol-based brake fluid

Feature - Benefit 3

Direct replacement for a proper fit

Feature - Benefit 4

Manufactured to strict engineering quality standards, each Brake Master Cylinder meets S.A.E. specifications

Thread Pitch

1.0

Package Contents

Master Cylinder

Number of Outlets

2

Rearward Outlet Size

M10 X 1.0

Master Cylinder Material

Aluminum

Mounting Hardware Included

No

Secondary Outlet Thread Diameter

10

Reservoir Included

Yes

Sensor Included

Yes

Master Cylinder Bore Diameter

0.938

Primary Outlet Thread Pitch

1 mm

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