1.8T Secondary air pump resistor (SAI). This resistor is required when the secondary air pump is removed from the car. The resistor prevents an open circuit and the fault code light from coming on. Simply solder the resistor into the original wiring harness that leads to the secondary pump. Manufacturer Information about the manufacturer BAR-TEK BAR-TEK Motorsport GmbH Im Rauschen Auel 3, 51491 Overath-Brombach, Germany info@bar-tek.com