Mopar 04723389AB Brake Master Cylinder Seal

Brake Master Cylinder Seal Overview

This Mopar brake master cylinder seal is a direct-fit grommet for select Ram heavy-duty trucks and Dodge Viper applications. It is identified by part number 04723389AB and supersedes earlier part number 04723389.

Key Features

• Genuine Mopar replacement seal for the brake master cylinder reservoir connection.
• Direct-fit grommet style for the listed applications.
• Supersedes part number 04723389.
• Fits select Ram 2500, Ram 3500, and Dodge Viper models.

Detailed Description

Use this brake master cylinder seal when replacing a worn or damaged reservoir grommet on compatible Ram 2500, Ram 3500, and Dodge Viper vehicles. The seal helps maintain a secure interface between the master cylinder reservoir and the brake hydraulic system, which is important for preserving proper fluid containment and system integrity. For buyers searching for Ram 2500 brake master cylinder seal 04723389AB or Dodge Viper reservoir grommet replacement, this Mopar part provides the correct OE-style service part for the listed fitments.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Is Used For

• Replacing a cracked or hardened master cylinder reservoir grommet.
• Restoring a tight seal at the brake fluid reservoir connection.
• Addressing brake fluid seepage at the reservoir interface.
• Correcting fitment issues caused by an aged or missing seal.

Installation Notes and Tips

Confirm the vehicle year, model, and application notes before ordering. Clean the reservoir and master cylinder sealing surfaces before installation, and inspect the mating components for wear or damage that could affect sealing performance. Match the part number 04723389AB to the required application, especially on Ram 2500 and Ram 3500 trucks with superseded service part references.

Quality Assurance

Mopar is the original equipment parts brand for Chrysler, Dodge, Jeep, Ram, and related vehicles, so this seal follows OE service-part standards for the listed applications.