Genuine OEM Audi Air Filter, part number 4M0133843C. This essential component cleans incoming air before it enters the engine, preventing contaminants from reaching critical engine parts. It is typically located within the air intake system. Weighing approximately 1.5 kg and measuring 0.51m in length, this filter ensures a precise fit and optimal filtration. Choosing a genuine OEM air filter guarantees the correct filtration media and flow characteristics, protecting your engine and maintaining peak performance.