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Dorman M390056 Brake Master Cylinder 7/8 In. Bore Aluminum Non-ABS

(1996-1997 Geo Tracker; 1982-1984 Volkswagen Vanagon; 1974-1981 Volkswagen Dasher; 1982-1983 Volkswagen Quantum; 1996-1998 Suzuki Sidekick + 4 more models)

Part of: Dorman Aluminum Brake Master Cylinder

Other options in this family: Dorman M630099 Dorman M390514 Dorman M39884 Dorman M39761 Dorman M390092

Manufacturer

Picture for manufacturer Dorman

Part Number

M390056
7 reviews
Sale Price

$125.98

In Stock (5)

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Usually delivered within 2 days

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Product Details

The Dorman M390056 is a 100% new brake master cylinder designed as a direct-fit replacement for select Chevrolet, Geo, and Suzuki vehicles equipped with non-ABS braking systems. Built to match the original equipment specifications, this master cylinder restores proper hydraulic brake pressure and pedal feel without the need for core returns or remanufactured components.

Key Features:

  • Precise OE Match: Cylinder housing is cast from aluminum to match the material and dimensions of the original part for consistent performance
  • EPDM Rubber Components: All internal seals and rubber parts are constructed from high-quality EPDM compound, providing excellent resistance to glycol-based brake fluids
  • 100% New Construction: Not remanufactured — every component is brand new for maximum reliability and safety
  • SAE Compliant: Manufactured to meet rigorous SAE International standards for hydraulic brake components
  • Bore Diameter: 7/8 in. (0.875 in.)
  • Outlet Thread Size: M10 x 1.0 (forward and rearward outlets)
  • Number of Outlets: 3
  • Material: Aluminum
  • ABS: Non-ABS applications only

The Dorman M390056 installs using existing hardware and mounting points, making it a straightforward replacement for professional technicians and experienced DIYers alike. OEM cross-reference part numbers include 91172675 and 5110056B10.

Products specifications

Fits

1996-1997 Geo Tracker; 1982-1984 Volkswagen Vanagon; 1974-1981 Volkswagen Dasher; 1982-1983 Volkswagen Quantum; 1996-1998 Suzuki Sidekick; 1996-2001 Audi A4; 1980-1984 Audi 4000; 1973-1979 Audi Fox; 1998 Chevrolet Tracker

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

Package Contents

Master Cylinder

Rearward Outlet Size

M10 X 1.0

Number of Outlets

3

Master Cylinder Bore Diameter

0.875

Thread Pitch

1.0

Secondary Outlet Thread Diameter

10

Master Cylinder Material

Aluminum

Sensor Included

Yes

Mounting Hardware Included

No

Reservoir Included

Yes

Primary Outlet Thread Pitch

1 mm

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