Cardone 54-71904 Power Brake Booster

Vacuum Power Brake Booster for Explorer, Aviator, and Mountaineer

Restore brake assist with this Cardone remanufactured vacuum power brake booster, part number 54-71904. Built for direct replacement on select Ford, Lincoln, and Mercury applications, it is re-engineered and tested to match original equipment performance for consistent pedal feel and dependable function.

Key Features

• Remanufactured to match O.E. performance
• Dual diaphragm design for vacuum-assisted braking support
• Steel housing with gray finish
• 100% tested for fit and function
• O.E. quality seals and check valves installed on every unit
• Rust-prohibitive finish helps extend service life
• Master cylinder output rods are pre-adjusted when included
• Package contents: booster, instruction manual, and M/C neck seal

Product Details

Cardone Vacuum Power Brake Booster 54-71904 is a remanufactured brake booster engineered for vehicles that rely on vacuum assist to reduce pedal effort. The dual diaphragm, 9.655-inch steel unit is built to deliver original-style braking response, with design review and upgrades applied where needed to improve durability over the original part. This part cross-references Ford and Mercury applications such as 1L2Z2005AA and 1L2Z2005BA for the same application.

Compatible With 2002-2005 Ford Explorer, without traction control and without master cylinder; 2004-2005 Lincoln Aviator, vehicles lacking master cylinders; 2003-2005 Mercury Mountaineer, without traction control and without master cylinder; and 2002 Mercury Mountaineer, vehicles lacking master cylinders. Search terms such as 2002-2005 Ford Explorer vacuum power brake booster and 2003-2005 Mercury Mountaineer brake booster replacement align with this application. The Cardone 54-71904 is also a direct-fit option for drivers replacing a worn vacuum brake booster on select Lincoln Aviator models.

Common Problems This Part Can Address

• Hard brake pedal feel from a failing booster diaphragm or vacuum leak
• Reduced brake assist during normal stopping
• Hissing noise from a leaking brake booster assembly
• Longer pedal travel caused by booster performance loss
• Brake response inconsistency after booster wear or corrosion

Installation Notes and Quality Assurance

Verify vehicle configuration before installation, including traction control and master cylinder presence, since fitment varies by application. Inspect the vacuum hose, check valve, and master cylinder neck seal during replacement to help ensure proper operation. The booster is 100% tested before release, and Cardone’s remanufacturing process includes O.E.-quality sealing components and a rust-resistant finish for dependable service.

Cardone remanufactures this vacuum power brake booster to match original equipment performance and function, with testing performed on every unit to confirm fit and operation.