Cardone 53-5721 Power Brake Booster

Cardone Vacuum Power Brake Booster 53-5721

Restore consistent brake assist with this remanufactured Cardone vacuum power brake booster. Built for O.E. performance and tested for fit and function, this unit is a direct replacement for select Volvo S40 and Volvo V40 applications that use a vacuum power brake booster and do not include a master cylinder.

Key Features

• Remanufactured to match original equipment performance
• Single-diaphragm design with a 9.46 in. (240.284 mm) diaphragm diameter
• Steel housing with gray finish and rust-prohibitive coating process
• 100% tested for reliable operation and proper fit
• O.E.-quality seals and check valves installed on every unit
• Master cylinder output rods are pre-adjusted when included for easier installation
• Includes booster, instruction manual, and M/C neck seal

Detailed Description

Cardone 53-5721 is a remanufactured vacuum power brake booster engineered to deliver the braking assist expected from the original part. The unit is re-engineered and tested to support dependable pedal feel and consistent vacuum-assisted braking. It uses a single diaphragm design and a steel construction with a gray finish, along with a corrosion-resistant finishing process that helps extend service life.

This part cross-references Volvo 30863324 for the same application. It is a strong match for Volvo S40 and Volvo V40 brake repair jobs where the original booster has lost assist or no longer maintains proper vacuum performance. The Cardone Vacuum Power Brake Booster line focuses on remanufactured OE-style replacements built for direct fitment and functional accuracy.

Vehicle Fitment

• Fits 2000-2004 Volvo S40, N/A; vacuum power brake booster; fits vehicles lacking master cylinders.
• Fits 2000-2004 Volvo V40, N/A; vacuum power brake booster; fits vehicles lacking master cylinders.

What This Part Helps Fix

• Hard brake pedal feel from reduced vacuum assist
• Brake booster leakage or loss of assist
• Inconsistent braking response during normal driving
• Fitment issues when replacing an original Volvo booster
• Corrosion-related booster housing deterioration

Installation Notes and Tips

Verify the master cylinder configuration before installation, since this booster is listed for vehicles lacking master cylinders. Confirm the master cylinder stud thread size is M8 x 1.25 and compare the original booster dimensions and mounting points before removal. Follow the included instruction manual and inspect the M/C neck seal during installation to help ensure a proper vacuum seal and correct brake system operation.

Quality Assurance

Cardone remanufactures this booster to O.E. performance standards and tests every unit for fit and function before release. The unit also uses O.E.-quality seals and check valves, along with a rust-prohibitive finishing process, to support dependable service life.