Feature: 1. Applicable Models: Idle air control valve is replacement for Derby and replacement for A3. Please confirm whether your model is applicable before buying. 2. OE Number: The part number of reference is 037906457E, please confirm whether it is consistent with the OE you need. 3. High Efficiency and Energy Saving: The idle speed adjustment valve can reduce fuel consumption by adjusting the engine idle speed, thus achieving high efficiency and energy saving. 4. Noise Reduction: The idle speed valve can effectively reduce the noise of the engine at idle and low speed to improve driving comfort. 5. Safe and Reliable: The idle air control valve can ensure the stability and safety of the engine power, avoiding the safety hazards caused by the loss of engine control. Specification: Item Type: Idle Air Control ValveMaterial: Alloy + plasticOE Number: 037906457EFitmen: Replacement for A3 Derby sedan. Package List: 1 x Idle Air Control Valve Note: 1. Please double check the part number of your item, matching information is for reference only. 2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks