VW Brake Booster - TRW PSA389

Product Information

Your vehicles brake booster is designed to provide power assistance to the braking system. On most cars, the brake booster uses engine vacuum to do this. However, many modern cars use an auxiliary vacuum pump to provide vacuum to the brake booster.

The brake booster is in line between the brake pedal and brake master cylinder. It essentially amplified the force applied to the pedal by your foot and outputs more braking force in the hydraulic braking system. This makes braking your vehicle a much less physical task.

When a brake booster is failing you may notice that braking effort increases. the engine runs poorly or stalls with force on the brake pedal, or the relative resting position of the brake pedal has changed. In these cases it is recommended to inspect the hoses leading to the brake booster as well as the brake booster itself. If the brake booster is in fact faulty it is highly recommended to replace it as soon as possible.

• Hard pedal with no braking power
• Longer stopping distance
• Engine stalls with brakes applied
• Brake pedal position higher than normal

About TRW

TRW Automotive is a business focused on the use of technology and manufacturing skill to make the impossible, possible. In 2014 TRW Automotive was acquired by ZF, a global leader in manufacturing OE (Original Equipment) spare parts for vehicles around the world. They remain as one of the world’s largest automotive suppliers through a combination of aftermarket and OEM (original equipment manufacturer) offerings. Their specialties span from electronics to steering to braking and occupant safety. TRW is OEM to over 40 major vehicle manufacturers, employing over 60,000 worldwide. The result? Chances are TRW parts were used during the manufacture of your car, so why not use TRW replacement parts when they need to be replaced? Stick with an OEM brand you can trust.

TRW Automotive is a global leader in automotive safety, producing one of the largest arrays of active and passive safety technologies. It continues to be at the forefront of developments in vehicle dynamics, driver assist systems, foundation brakes, inflatable restraints, seat belt technologies and the electronics and software advancements that will enhance the safety, convenience and comfort of tomorrow's vehicles.

The TRW brand is part of ZF Aftermarket, leader in the world for Original Manufacturer [OE] quality automotive safety products. Our TRW Braking systems, Steering and Suspension parts, Commercial Vehicle components and Service Tools are legendary for their engineering quality and innovative design. They are also famously well tested, in-house and independently.