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Dorman M631018 Brake Master Cylinder New OE Replacement

(2004-2008 Chevrolet Aveo; 2007-2008 Chevrolet Aveo5 LS/Special Value; 2014-2020 Acura RLX; 1999-2002 Daewoo Lanos)

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

M631018
8 reviews
Sale Price

$113.72

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 M631018 is a 100% new brake master cylinder engineered as a direct OE replacement for select Acura RLX models. Unlike remanufactured alternatives, this unit is built entirely from new components to deliver consistent, reliable braking performance right out of the box.

Key Features:

  • Precise OE Match: Cylinder housing is cast to match the material and geometry of the original part for a true fit and similar performance
  • EPDM Rubber Seals: All internal rubber components are manufactured from high-quality EPDM compound, providing superior resistance to glycol-based brake fluids
  • 100% New Construction: Made entirely from new materials — not remanufactured or rebuilt — ensuring maximum safety and longevity
  • SAE Compliant: Engineered to meet rigorous SAE International standards for hydraulic brake system components

This brake master cylinder provides a straightforward, confidence-inspiring replacement for a critical safety component. Designed by Dorman — a leading U.S.-based automotive aftermarket manufacturer with over 100 years of industry experience — the M631018 restores proper hydraulic pressure and pedal feel to your braking system.

Products specifications

Fits

2004-2008 Chevrolet Aveo; 2007-2008 Chevrolet Aveo5 LS/Special Value; 2014-2020 Acura RLX; 1999-2002 Daewoo Lanos

Number of Outlets

2

Master Cylinder Cap Included

No

Rearward Outlet Size

M12 X 1.0

Package Contents

1 New Master Cylinder

Bleeder Hoses Included

No

Sensor Included

No

Push Rod Included

NO

Brake Booster Included

No

Master Cylinder Material

Aluminum

Mounting Hardware Included

No

Secondary Outlet Thread Diameter

12

Mounting Bracket Included

No

Mounting Hole Quantity

2

Reservoir Included

No

Reservoir Type

Removable

Master Cylinder Bore Diameter

0.9375

Secondary Outlet Thread Diameter

M12 X 1.0

I had to enter my card number 5 times and almost gave up. But the item price kept me trying, the process was very easy.

Quick,easy, and good prices!

This was the only place that I could find the Champion Resistor Spark Plug that my weed wacker needed. Had a great experience in ordering and receiving product.

Had what was looking for at good price. First purchase from autoplicity so somewhat unsure about company but will soon find out if reputable or no?

best price easy to order competitors prices accurate

1st time

Good

simple and easy

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