My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Dorman M390286 Brake Master Cylinder New OEM Replacement

(1988-1991 Chevrolet S10; 1988-1991 Chevrolet S10 Blazer; 1991 GMC Sonoma Base/SLE; 1988-1990 GMC S15 High Sierra/Sierra Classic + 4 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

M390286
8 reviews
Sale Price

$118.42

In Stock (5)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Dorman M390286 is a 100% new replacement brake master cylinder engineered to restore proper braking system hydraulics. Precision-designed to match the original equipment specifications, this master cylinder delivers reliable, factory-level braking performance without the cost or uncertainty of a remanufactured unit.

Key Features:

  • Precise OE Replacement — Cylinder housing is constructed to match the casting material of the original part for consistent, reliable performance
  • Durable EPDM Rubber Components — All internal rubber seals and components use high-quality EPDM compound, offering excellent resistance to glycol-based brake fluid
  • 100% New Construction — Made entirely from new materials, not remanufactured or rebuilt, ensuring the highest standards of quality and safety
  • SAE Compliant — Manufactured to meet rigorous SAE International specifications for hydraulic brake components
  • Direct Fit Design — Engineered to bolt in place of the original master cylinder for a straightforward, no-modification installation

The Dorman M390286 brake master cylinder is the trusted aftermarket solution for restoring full hydraulic braking function. Built entirely from new components and validated against strict industry standards, it provides peace of mind for both professional technicians and DIY repair enthusiasts.

Products specifications

Fits

1988-1991 Chevrolet S10; 1988-1991 Chevrolet S10 Blazer; 1991 GMC Sonoma Base/SLE; 1988-1990 GMC S15 High Sierra/Sierra Classic; 1988-1991 GMC S15 Jimmy; 1995-1998 Toyota Tercel; 1995-1998 Toyota Paseo; 1991 Oldsmobile Bravada 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

Thread Pitch

1.0

Package Contents

Master Cylinder

Secondary Outlet Thread Diameter

10

Number of Outlets

2

Reservoir Included

Yes

Mounting Hardware Included

No

Rearward Outlet Size

M10 X 1.0

Master Cylinder Bore Diameter

0.813

Sensor Included

Yes

Master Cylinder Material

Aluminum

Its my first time using you--I"ll let you know

first time ive order from here and my experience was great! shipping was crazy fast. and they had the best price shipped on the 2jz arp head stud set i could find. also how on their site they actually list if they have the part in stock and how many which is very helpful. ive payed for parts to find out the vender didn't even have them available. which lead to more down time. and we all hate down time :)

I ordered an Optima battery for my truck after I did a Google search for the battery. Autoplicity was the cheapest on the Web. Even cheaper then eBay. They got me hooked. Thanks Autoplicity

Great place to shop, low prices and ease of website to browse!

This is the first time I've ordered from Autoplicity. I found they had the best price on the item I was looking for and decided to try them. I ordered this item yesterday(Sunday) and was just informed that it shipped. That is quick. I am pleased with their customer service and will use them as my first source.

Ordered a CTEK charger. Great price, and recieved it in 3 days. Very pleased.

I ordered a Flowmaster cat back system for my 2012 F-150. The order arrived the day they said it would and the product came at a fair price. Well done.

Excellent customer service. Treated me very well. Issued a refund, no problem. Thank you!!

Share icon
Return Policy
Returns are easy at Autoplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy