The John Deere RE42051 is a genuine OEM bypass oil filter designed to provide superior filtration for John Deere engines across a wide range of agricultural and construction equipment. This essential component helps maintain engine health by efficiently removing contaminants from the lubricating oil, thereby extending engine life and ensuring reliable performance. Featuring a 3/4-16 UNF thread, it serves as a direct replacement for specified models, including numerous 6R, 7R, 8R, and 9R series tractors, combines, sprayers, and loaders.