This is a genuine 2011-2015 Audi S4 engine noise sound actuator with part numbers 4H0907601 and 4H0907601D. It is an OEM part and has been previously used. This product is perfect for Audi owners who want to replace their old or faulty engine noise sound actuator. The part is compatible with electric, hybrid, and PHEV specific parts and is ideal for those looking for other electric, hybrid, and PHEV specific parts.