Free Shipping On Orders Over $49. Details

Talk to a Mustang Enthusiast
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win $15,000!! Enter Now
Coronavirus: We are Open For Business, Prioritizing health and safety Learn More

OPR Hydraulic Power Brake Booster (99-04 w/ Hydro Boost)

Item 525162
Call a Mustang Enthusiast at 1-877-887-1105
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Market Price $220.99 You Save 10% ($21.00)
Our Price


FREE Shipping

Will this fit your Vehicle?

Select a different vehicle Help?
Update or Change Vehicle
Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Improve Braking Performance
      • Cast Iron Construction
      • Re-Manufactured OEM Part
      • Hydraulic Power Brake Booster
      • Fully Tested and Inspected
      • Direct Bolt-on Installation
      • Fits 1999-2004 Mustangs Equipped with Hydro-Boost


      Improves Stopping Power. Improve the stopping power of your Mustang to like-new performance by replacing your old, worn out power brake booster with a direct fit remanufactured replacement from OPR. A remanufactured Hydraulic Power Brake Booster is a great and inexpensive way to bring your Pony to a stop, perfect for budget builds and restorations.

      Remanufactured OEM Part. This OPR remanufactured Power Brake Booster is a genuine OEM part that has been completely disassembled, cleaned, inspected, and reassembled with only the highest quality components using 100% OE quality seals, diaphragms and check valves. This Power Brake Booster is then completed in a rust-prohibitive finish to extend its life span.

      Fully Tested. All the critical components of this Power Brake Booster have been inspected and tested with the fully assembled booster being vacuum pressure tested to ensure exceptional like-new performance.

      Direct Fit Replacement. This OPR Hydraulic Power Brake Booster is a direct fit replacement for your Mustang’s original stock booster, so it simply bolts into place. Seeing that installation may require bleeding the brake system professional installation is highly recommended.

      Application. This OPR Re-Manufactured Hydraulic Power Brake Booster is designed for use on 1999-2004 Mustangs equipped with Hydro-Boost, including the V6, GT, Bullitt, Mach 1 and SVT Cobra models.


      Fitment: 1999 2000 2001 2002 2003 2004 Details

      MPN# 525162

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (7)

      Write a Review

      Ratings Summary

      4.0 out of 5 overall rating from 7 customers

      Installation Time: Afternoon

      • June 15, 2018

        1 2004 Mach 1 - SonnyE

        Mach 1

        This part is not for a Mach 1, it is a new part that takes place of the old on but doesn't fit in the Mach 1s

        Helpful (5)
      • February 23, 2018

        5 2004 GT - RichardS Installation Time: Afternoon

        OEM Fit

        Easy instal with a perfect OEM fit, and braking is restored as good as new.

        Helpful (6)
      • December 19, 2017

        5 1999 GT - NancyG Installation Time: Afternoon

        Great brake booster

        All is good when I use American Muscle! Love, love, love this co. I haveto never been disappointed and will continue tobe use them!

        Helpful (9)
      • August 13, 2017

        5 1999 GT - EdwinL Installation Time: Afternoon

        Problem solved

        Had an issue with my brakes locking up after a short drive. Was told by a friend to change the hidro booster. Sure enough solved my problem

        Helpful (9)
      • July 31, 2017

        4 2004 Mach 1 - CharlesB Installation Time: Afternoon

        Hydro Boost

        Easier than expected to install. You do not have to disconnect the brake lines from the master cylinder as the instructions tell you to. I gave 4 stars because the instructions don't tell you how to remove the master cylinder push rod from the old unit and the threads on the mounting studs were caked with paint so the nuts wouldn't start until I cleaned them up.

        Helpful (8)
      • February 21, 2017

        3 2003 Cobra - Jake Installation Time: Weekend


        Upon arrival the brake booster was sticking out of the box in two different spots, it was a little dinged up but I live very far away from the origin of the shipment so I am used to all my stuff getting banged up.Again this could be just due to my location but the bolts on the middle of the preinstalled part were rusted and the black finish was cracking and peeling off showing a green coat of paint underneath I just re painted it black, seemed to be a oem re-manufactured one, it looked aged already out of the box. The fitment was perfect once I got it in, it takes a bit of work to get it in but thanks to the provided and very detailed instructions everything was a breeze. You do have to reuse some parts from your old one and this part doesn't have very detailed instructions so PAY attention to what it looked like before you take parts out, there are also orings provided that the instruction manual also doesn't cover I ended up using like 4/7 orings (some were really obvious while others didn't fit anywhere). Overall the performance far outweighs the other cons I listed great product stopping power is very strong and my vacuum leak is fixed.

        Helpful (9)
      • March 23, 2016

        5 2001 Other - Ralph Installation Time: Afternoon

        New booster

        Needed a new brake booster with hydraulic and came across this one in black. Looks great In my all black and polished engine bay. And works perfect!

        Helpful (11)

      Questions & Answers (3 answers)

      3 Top Rated Questions

      I have a leak in the hydro boost brake system are special tools needed to replace the power brake booster?

      • The OPR Hydraulic Power Brake Booster will not require any special tooling to install.

      Helpful (10)

      Will this fit on 03 04 Cobra?

      • This will fit 03-04 Cobra models.

      Helpful (0)

      Will this fit an 03 MACH 1?

      • This will fit the 03-04 Mustang Mach 1 models.

      Helpful (0)
      Post Your Question

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Power Brake Booster

      Tech Specs

      Will It Fit My Mustang

      • Bullitt - 01
      • Cobra - 99, 01, 03, 04
      • GT - 99, 00, 01, 02, 03, 04
      • Mach 1 - 03, 04
      • V6 - 99, 00, 01, 02, 03, 04

      Designed for Mustangs equipped with Hydro-Boost only.

          Related Mustang Categories