Genuine OEM Volkswagen Rear Brake Caliper, part number 1J0615423G. This critical component applies hydraulic pressure to the brake pads, converting kinetic energy into heat to slow and stop the vehicle. It is positioned on the left rear wheel assembly. Constructed from durable cast metal, it weighs approximately 1.42 kg and measures 0.17m in length. Choosing a genuine OEM brake caliper ensures precise fitment, correct piston operation, and optimal braking performance, which is vital for safety.