TRW PSA122 Power Brake Booster

Reliable Power Brake Booster for BMW 7 Series Models

The TRW PSA122 power brake booster is designed as a standard replacement part for select BMW 7 Series vehicles. Engineered to restore proper brake assist function, this vacuum booster ensures consistent pedal feel and braking performance for models including the 745i, 745Li, 750i, 750Li, 760i, and 760Li.

Key Features of the TRW PSA122 Power Brake Booster

• Standard replacement grade for dependable brake service
• Vacuum booster type providing effective brake assist
• Dual diaphragm design with a 245 mm diameter for balanced pressure
• Durable steel housing construction for long-lasting performance
• Includes essential gaskets and neck seals for proper installation
• Compatible with BMW 745i, 745Li, 750i, 750Li, 760i, and 760Li models

Detailed Product Description

The TRW PSA122 power brake booster is a vacuum-type booster featuring a dual diaphragm with a 245 mm diameter, designed to deliver consistent and reliable brake assist. Its steel housing provides structural integrity and resistance to wear, ensuring durability under demanding conditions. This booster does not include a master cylinder, brake pedal rod extension, mounting hardware, or mounting bracket, but it does come with the necessary gaskets and neck seals to maintain a proper seal and prevent vacuum leaks. Specifically engineered for BMW 7 Series models such as the 745i, 745Li, 750i, 750Li, 760i, and 760Li, the PSA122 meets OEM specifications for a direct replacement.

Common Applications and Issues Addressed

• Restores brake pedal responsiveness and assist in BMW 7 Series vehicles
• Eliminates hard brake pedal problems caused by failing boosters
• Prevents vacuum leaks that reduce braking efficiency
• Addresses inconsistent brake pedal travel or sponginess
• Replaces worn or damaged brake boosters to maintain safety

Installation Notes and Tips

When installing the TRW PSA122 power brake booster, ensure all vacuum lines are inspected and free of damage. Since mounting hardware and master cylinder are not included, reuse existing components or source separately as needed. Properly install the included gaskets and neck seals to prevent vacuum leaks. It is recommended to verify compatibility with your specific BMW 7 Series model year before installation.

Quality Assurance and Warranty

TRW manufactures the PSA122 power brake booster to meet strict quality standards, ensuring reliable performance and durability. This part is designed as a standard replacement to match OEM specifications. Warranty coverage details should be confirmed with the parts provider or manufacturer documentation.