The TRW Power Brake Booster - PSA915 is a high-quality automotive component designed to improve the braking performance of a vehicle. It is a hydraulic device that assists in applying pressure to the brakes, making it easier for the driver to slow down or stop the vehicle. The brake booster is made by TRW, a trusted manufacturer of automotive parts, and is specifically designed for use in vehicles made by PSA, such as Peugeot and Citroen. It is a durable and reliable product that helps ensure safe and efficient braking, providing peace of mind for drivers and passengers alike.