fits e.g. VW Golf IV (1J1) (please check exact vehicle application) HELLA boost pressure sensor measures the pressure in the charging system versus ambient air and sends a voltage signal to the ECU to ensure optimal engine performance in all conditions. Supports lower fuel consumption and improved combustion, contributing to reduced emissions and better overall efficiency. Built for durability-HELLA sensors are resistant to vibration, heat, and dirt, delivering long-lasting accuracy and consistent OE-level signal quality. Please check the OEM number to ensure correct fitment for your vehicle and application.