Genuine OEM Audi A/C Compressor Serpentine Belt, part number 06E903137Q. This belt is responsible for driving the air conditioning compressor, which is a critical component of the vehicle's climate control system. It ensures the compressor operates efficiently to provide cooling. Weighing 0.235 kg and measuring 1.13 meters in length, this belt is designed for precise fitment and optimal performance. Choosing a genuine OEM belt guarantees the correct material composition and tension characteristics for long-lasting, quiet, and reliable operation of the A/C system.