Cardone 53-6404 Power Brake Booster

Vacuum Power Brake Booster for OE-Style Braking

The Cardone 53-6404 vacuum power brake booster is a remanufactured replacement built to restore brake assist and pedal response. It is engineered and tested to match original equipment performance for the 2001 Infiniti QX4 and 2001 Nissan Pathfinder applications listed below.

Cardone’s Vacuum Power Brake Booster line focuses on remanufactured brake assist components that are inspected, upgraded where practical, and tested for fit and function. This 53-6404 unit follows that approach with a dual-diaphragm design and a corrosion-resistant finish for long-term service.

Key Features

• Remanufactured to match original equipment performance
• Dual-diaphragm design with a 10.112 in. (256.8448 mm) diaphragm diameter
• Steel housing with gray finish
• 100% tested for reliable fit and function
• O.E.-quality seals and check valves installed for consistent brake assist
• Rust-prohibitive finishing process helps extend service life
• Master cylinder output rods are pre-adjusted when included
• Master cylinder stud thread size: M8 x 1.25

Detailed Description

Cardone 53-6404 is a remanufactured vacuum power brake booster designed for direct replacement in select 2001 Infiniti QX4 and 2001 Nissan Pathfinder models. It uses a dual diaphragm layout to support brake assist performance, and each unit is fully tested before release. The booster is built with O.E.-quality seals and check valves, and the finishing process is intended to improve resistance to rust over time. This part number, 53-6404, is a practical choice when replacing a worn booster on a 2001 Infiniti QX4 or 2001 Nissan Pathfinder with the listed no-master-cylinder configuration.

This part cross-references Infiniti 472103W410 and Nissan 472103W410 for the same application.

What It Helps Address

• Hard brake pedal feel caused by reduced vacuum assist
• Delayed or inconsistent brake response
• Vacuum leaks at the booster assembly
• Brake assist loss from a worn diaphragm or internal seal wear
• Corrosion-related booster housing deterioration

Installation Notes and Tips

Verify the vehicle application before installation and confirm the master cylinder stud thread size is M8 x 1.25. This booster is listed for vehicles lacking master cylinders, so inspect the existing brake system components and vacuum supply before replacement. The package includes the booster and instruction manual. For best results, follow factory service procedures and check pedal height, vacuum routing, and brake operation after installation.

Quality Assurance

Each Cardone remanufactured power brake booster is re-engineered, built, and tested to meet original equipment performance expectations. Units are 100% tested to help ensure proper fit and function, and the design is reviewed for durability improvements where applicable. The Cardone 53-6404 is intended to deliver dependable brake assist for compatible Infiniti and Nissan applications.