The Mahle Engine Air Filter Kit - 473535 is a comprehensive kit designed for maintaining and improving the performance of a car's engine air filter. The kit includes a variety of products that work together to ensure that the engine air filter is clean and functioning properly. These products include an air filter, a filter cleaner, a filter oil, and a filter seal. The air filter is designed to trap dirt, dust, and other particles from entering the engine, preventing damage and maintaining optimal performance. The filter cleaner is used to remove any buildup or debris from the air filter, ensuring it is free of any obstructions. The filter oil is used to re-oil the filter after cleaning, helping to improve its efficiency. Lastly, the filter seal is used to properly seal the air filter in place, preventing any air leaks. This kit is essential for maintaining the health of a car's engine and ensuring smooth and efficient operation.