What Does It Mean When the Volkswagen Brake Booster System Is Restricted?
2 Answers
Brake booster system restriction refers to the failure of the brake booster system. Below is an introduction to the booster system: Mechanical Hydraulic Booster: Mechanical hydraulic booster is the most common type of booster system, invented in 1902 by British engineer Frederick W. Lanchester. However, its first commercial application was delayed until half a century later, when Chrysler implemented the mature hydraulic power steering system in the Imperial series in 1951. Due to its mature technology, reliability, and low cost, it became widely popular. Electro-Hydraulic Booster: Since mechanical hydraulic boosters consume a significant amount of engine power, improvements were made to develop a more energy-efficient electro-hydraulic power steering system. In this system, the steering pump is no longer directly driven by the engine but by an electric motor. Additionally, an electronic control system was introduced, making the steering assist force not only dependent on the steering angle but also on the vehicle speed. The mechanical structure includes added hydraulic reaction devices and fluid distribution valves, while the new electronic control system consists of speed sensors, solenoid valves, and the steering ECU.
I experienced a brake booster limitation issue while driving my Volkswagen, meaning the brake pedal suddenly became stiff and required much more effort to press down, unlike its usual ease. This is typically due to a vacuum system leak, such as loose or cracked vacuum pipe connections, resulting in insufficient vacuum for the booster to assist braking. It could also be caused by sensor failure or issues with the electronic control unit, with a warning light appearing on the dashboard. Once, when my car had this problem, I immediately pulled over to check and found that the pipe connection had aged and was leaking. Fortunately, it was repaired in time without any accidents. It's advisable not to ignore this issue, as increased braking distance can be very dangerous. Head to a repair shop immediately for professional diagnostic tools. During regular maintenance, pay extra attention to the condition of vacuum pipes to avoid accidents while driving at high speeds.
