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Dorman M630381 Brake Master Cylinder Replacement

(2003-2005 Kia Rio; 1985-1989 Isuzu Impulse Base)

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

M630381
8 reviews
Sale Price

$103.89

In Stock (5)

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Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

The Dorman M630381 is a 100% new brake master cylinder engineered as a direct OE replacement. Unlike remanufactured units, this master cylinder is built entirely from new components, ensuring consistent quality, safety, and long-term reliability right out of the box.

The cylinder housing is precision-cast to match the material and geometry of the original equipment part, delivering proper fit and brake system performance. All internal rubber components are manufactured from high-quality EPDM compound, providing excellent resistance to glycol-based brake fluids and helping prevent premature seal degradation.

Key Features:

  • 100% new construction — not remanufactured or rebuilt
  • Cylinder housing matches OE casting material for accurate fitment and performance
  • EPDM rubber seals and internal components resist glycol-based brake fluid deterioration
  • Engineered to meet rigorous SAE International standards
  • Precision-engineered to match original design, function, and performance

The Dorman M630381 brake master cylinder is a straightforward, confidence-inspiring replacement for worn or failing OE units, restoring proper hydraulic pressure and pedal feel to the braking system.

Products specifications

Fits

2003-2005 Kia Rio; 1985-1989 Isuzu Impulse Base

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

Master Cylinder Material

Aluminum

Reservoir Included

Yes

Thread Pitch

1.0

Number of Outlets

2

Package Contents

Master Cylinder

Master Cylinder Bore Diameter

0.875

Secondary Outlet Thread Diameter

10

Sensor Included

Yes

Mounting Hardware Included

No

Rearward Outlet Size

M10 X 1.0

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Fast shipping, good customer service!

Good selection, lowest price. Fast shipping. Thanks again!!!

The item was what i was looking for and the price was right. Item was very good quality. Would order from Autoplicity again.

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Great prices and fast shipping. It doesn't get any better

Excellent price and received the product the next day.

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