Genuine OEM Volkswagen Backrest Solenoid Valve, part number 057131086J. This valve is crucial for controlling the backrest adjustment mechanism, allowing for proper seat positioning. It is a compact component, weighing 0.035 kg with dimensions of 0.053m x 0.045m x 0.04m. Using a genuine OEM solenoid valve ensures precise electrical and mechanical operation, critical for reliable and safe seat adjustments.