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Dorman M630636 Brake Master Cylinder OE Replacement

(Buick LeSabre 1989, Riviera 1988-89, Electra 1988-89, Reatta 1988-89; Pontiac Bonneville 1989; Oldsmobile Delta 88 1989, 98 1988-89 + 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

M630636
10 reviews
Sale Price

$145.84

In Stock (5)

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Dorman M630636 is a direct-fit, 100% new brake master cylinder engineered to restore proper braking function to your vehicle. Designed as a precise OE replacement, this master cylinder matches the casting material, dimensions, and hydraulic performance of the original factory part — delivering a confident, drop-in fit without modifications.

Unlike remanufactured alternatives, the M630636 is built entirely from new components, including high-quality EPDM rubber seals and internal components specifically formulated for long-term resistance to glycol-based brake fluids. The cylinder housing is constructed to match the original casting material, ensuring thermal performance and durability consistent with the OEM part.

Key Features:

  • Precision-engineered cylinder housing matches the casting material of the original part
  • All rubber components use high-quality EPDM compound for resistance to glycol-based brake fluid
  • 100% new construction — not remanufactured — for maximum safety and reliability
  • Manufactured to meet rigorous SAE International standards
  • Direct OE replacement design for a straightforward, bolt-on installation

Dorman's M630636 brake master cylinder is a trusted solution for DIYers and professional technicians seeking OEM-quality braking performance without the dealer price premium.

Products specifications

Fits

Buick LeSabre 1989, Riviera 1988-89, Electra 1988-89, Reatta 1988-89; Pontiac Bonneville 1989; Oldsmobile Delta 88 1989, 98 1988-89, Toronado 1988-89; Chevrolet Epica 2006, 2009; Suzuki Verona 2004-06

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

Secondary Outlet Thread Diameter

10

Sensor Included

Yes

Mounting Hardware Included

No

Package Contents

Master Cylinder

Number of Outlets

2

Reservoir Included

Yes

Master Cylinder Bore Diameter

1

Rearward Outlet Size

M10 X 1.0

Thread Pitch

1.0

Master Cylinder Material

Aluminum

Primary Outlet Thread Pitch

1 mm

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