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Select your vehicle
Vehicle Info Required to Guarantee FitAdd Vehicle

Dorman®
M390259 Hydro-boost Brake Master Cylinder with Reservoir

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$38.49
$91.01Save: $52.52(58%)
Manufacturer #M390259
Vehicle Info Required to Guarantee FitAdd Vehicle
Qty:
1

Highlights

Brand:
Notes:
1.13 in. bore diameter; 9/16-18 Forward Outlet Size Forward Outlet Size; 1/2-20 Rearward Outlet Size
Series:
First Stop Series
Condition:
New
Reservoir Included:
With Reservoir
Replaces OE Number:
13055, 102352, 132352, 174723, 1002614, 4778450, 8344029, 13066029, 13166029, 18021273, 18029967, 35547158, 78344029, 18M1492, 18M714, F131468, M3034, M86029, M900952, MC131468, MC250120, MC390259, NM3034
Includes:
With Cap
Quantity Sold:
Sold individually
Warranty:
Lifetime Dorman limited warranty
Prop 65 Warning:

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number:
RC27090012, 13055, 102352, 132352, 174723, 1002614, 4778450, 8344029, 13066029, 13166029, 18021273, 18029967, 35547158, 78344029, 18M1492, 18M714, F131468, M3034, M86029, M900952, MC131468, MC250120, MC390259, NM3034
Material:
Aluminum
Outlet Quantity:
2 Outlets
Recommended Use:
OE Replacement

Vehicle Fitment Information

Vehicle Name
Submodel
Engine
Fitment Information
1994 Chevrolet Blazer
Base
8 Cyl 5.7L
Stamped-18013977; With Vacuum Booster
1994 Chevrolet Blazer
Base
8 Cyl 6.5L
Stamped-18013977; With Vacuum Booster
1994 Chevrolet Blazer
Silverado
8 Cyl 5.7L
Stamped-18013977; With Vacuum Booster
1994 Chevrolet Blazer
Silverado
8 Cyl 6.5L
Stamped-18013977; With Vacuum Booster
1994 Chevrolet Blazer
Silverado Sport
8 Cyl 6.5L
Stamped-18013977; With Vacuum Booster
Page 1 of 54 | Showing 1 - 5 of 266 results

Product Information

DORMAN FIRST STOP OE REPLACEMENT BRAKE MASTER CYLINDERS

Replace your leaking master cylinder with Dorman’s First Stop OE replacement brake master cylinders and stomp on the brakes with renewed confidence. Since 1918, Dorman Products has supplied the automotive aftermarket with high-quality replacement parts, hardware and fasteners.

  • Housing manufactured with premium cast iron or aluminum
  • Rigorously engineered to meet SAE standards
  • EPDM-based rubber components holds up against glycol-based brake fluid
  • 100% new
Need help?Call our product expert1-866-529-0412
Chat with us
Mondays - Sundays7am - 11pm ET | 4am - 8pm PT
Warranty Policy
Right parts, guaranteed. If you find any defects, let us know within 60 days and we’ll take care of it. Check out our Warranty Policy for more details.
Shipping Policy
We ship fast so you can get on the road that much faster. Check out our Shipping Policy for more details.
Easy Return Policy
We’re only happy if you’re happy. If you’re not entirely satisfied with your order, you may be entitled to a refund. Check out our Return Policy for more details.

Product Q&A

1
Does this fit agaist the booster or is there a bracket between the master cylinder and booster on a 97 gmc sierra c1500?Bob C.Sep 20, 2021
Best Answer:Hi Bob, I'm glad to assist you. The brake master cylinder is directly installed at the back of the brake booster on most vehicles. Click the link after this to see a general guide (DIY) how to install a brake master cylinder (https://youtu.be/StkzzZWr3Ac). This part is a guaranteed fit with the 1997 GMC C1500 all submodels, 6 and 8 Cyl 5.7L, 4.3L, and 5.0L. This is not compatible for the 6.5L engine. Grab our promo sale price offer and click the link below to order today. I hope this helps. Happy shopping. <a href="https://www.carparts.com/brake-master-cylinder/dorman/rbm390259?can=CPJE1043" target="_blank">https://www.carparts.com/brake-master-cylinder/dorman/rbm390259?can=CPJE1043</a>
Jeonino E.STAFFSep 20, 2021
0
What keeps the front brakes from locking up I already replace the front calipers in the rubber hoses and they continue locking up?Gilberto S.May 25, 2021
Best Answer:Hi Gilberto, I'm glad to help you out. Since you already replaced the calipers and hoses, replacing the master cylinder could do the job. The brake master cylinder is one of the most important components found in modern car braking systems. It serves as the main valve that pushes brake fluid through the brake lines so that the brake calipers can squeeze the pads against the rotors. I hope this helps. To order the part, click on the link below while the part is in stock and take advantage of our ongoing sale today. Happy shopping. <a href="https://www.carparts.com/brake-master-cylinder/dorman/rbm390259?can=CPGG4850" target="_blank">https://www.carparts.com/brake-master-cylinder/dorman/rbm390259?can=CPGG4850</a>
Grace G.STAFFMay 26, 2021

Customer Reviews

Quality product great price well illustrated directions would buy again
Purchased on Oct 07, 2014
Didn't take long to get the part. Nothing missing and no damages. Will be ordering more parts soon. Recommend this company.
Victor C.
VERIFIED PURCHASER
Purchased on Jan 31, 2024