The Knecht Filter OX420D is a high-quality oil filter insert designed to provide superior filtration for various Audi models. This genuine Knecht component effectively removes contaminants from engine oil, protecting critical engine parts from wear and ensuring long-term performance. Engineered to meet or exceed OEM specifications, the OX420D offers reliable and efficient oil cleaning, contributing to extended engine life and maintaining peak operating efficiency. It is a direct replacement for original equipment filters, ensuring a perfect fit and easy installation.