Replace your leaking 2015-2023 S550 Mustang brake master cylinder and brake booster with this excellent collection of parts from LMR! Master cylinder fitment depends on your transmission and Performance Pack status, Manual PP, Auto PP, and Auto Non-PP EcoBoost/V6/GT each use their own part, the same across every model year. Not sure which master cylinder matches your Mustang? Our S550 brake specialists can help you confirm the right fit.
Losing power assist in your 2015-2023 S550 Mustang brake system? A faulty master cylinder or brake booster is usually the culprit. Late Model Restoration has the direct replacement parts you need. Don't forget your high-performance brake fluid to keep your brake fluid from boiling.
Which master cylinder fits your Mustang? Fitment comes down to transmission and trim rather than model year, Manual Performance Pack, Automatic Performance Pack, and Automatic Non-PP EcoBoost/V6/GT each use a dedicated master cylinder, unchanged across every year from 2015 through 2023. Pair it with high-performance brake fluid, like Motul RBF 600 or Motorcraft DOT 4, to keep pedal feel firm under heat.
Bleeding your brakes after a master cylinder swap? Check our Bleeding Brake Calipers with Two Bleeder Screws guide, and grab a bleeder kit while you're at it.
Shop related: All S550 Mustang Brakes · Brake Kits · Rotors · Pads · Pad & Rotor Kits · Calipers & Adapter Brackets · Hubs, ABS, & Spacers