Cardone 53-3103 Power Brake Booster

Vacuum Power Brake Booster for Jaguar

Restore consistent brake assist with this Cardone remanufactured vacuum power brake booster, part number 53-3103. Built for Jaguar applications that require a direct-fit replacement, it is re-engineered and tested to match original equipment performance for dependable pedal response.

Compatible with Jaguar Vanden Plas, XJ12, XJ6, XJR, XJS, and XJRS applications listed below, this booster is a practical replacement for vehicles with vacuum-assisted braking and no master cylinder included.

Key Features

• Remanufactured to match O.E. performance
• Dual diaphragm design with 8.5 in. (215.9 mm) diaphragm diameter
• Steel construction with gray finish
• 100% tested for fit and function
• O.E.-quality seals and check valves installed
• 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

Product Details

Cardone Vacuum Power Brake Booster 53-3103 is part of the Cardone remanufactured brake booster line, which focuses on restoring original braking performance through inspection, re-engineering, and testing. This unit is built to deliver the fit and function expected from an OE-style replacement while using upgraded processes where applicable to improve durability. Package contents include the booster, instruction manual, and M/C neck seal.

This part cross-references Jaguar JLM12078 for the same application.

What It Helps Address

• Hard brake pedal feel from a weak or failed booster
• Reduced vacuum assist during braking
• Brake response issues caused by internal diaphragm wear
• Fitment problems from an incorrect replacement booster
• Corrosion-related booster deterioration

Installation Notes

• Fits 1990-1996 Jaguar Vanden Plas, N/A; fits vehicles lacking master cylinders.
• Fits 1994-1996 Jaguar XJ12, N/A; fits vehicles lacking master cylinders.
• Fits 1995-1996 Jaguar XJ6, N/A; to VIN # 748414, without master cylinder.
• Fits 1995-1996 Jaguar XJR, N/A; to VIN # 748414, without master cylinder.
• Fits 1993-1996 Jaguar XJS, N/A; fits vehicles lacking master cylinders.
• Fits 1990-1994 Jaguar XJ6, N/A; fits vehicles lacking master cylinders.
• Fits 1993 Jaguar XJRS, N/A; from VIN # 198355, without master cylinder.

Verify VIN breakpoints and master cylinder configuration before installation. The booster is supplied without a master cylinder, so transfer and adjustment checks should be completed during brake system service.

Quality Assurance

Each Cardone remanufactured brake booster is 100% tested to confirm reliable performance, fit, and function. The unit is re-engineered from original design data, with O.E.-quality seals and check valves installed to support consistent operation in Jaguar brake systems.