The ATP TF-189 Automatic Transmission Filter Kit is engineered to maintain the cleanliness of transmission fluid in select Ford and Mazda vehicles, including the 2000-2011 Ford Focus, 2010-2013 Ford Transit Connect, and various Mazda models such as the 2004-2009 Mazda 3, 2006-2007 Mazda 5, and 2003-2006 Mazda 6. Regular replacement of the transmission filter is essential to prevent debris accumulation, which can lead to clogged valve bodies and other critical components, potentially resulting in costly repairs. By ensuring the transmission fluid remains clean, the ATP TF-189 filter contributes to extending the transmission's operational lifespan and enhancing overall vehicle performance. This filter kit is designed for direct fitment, facilitating straightforward installation and compatibility with the specified vehicle models. It is recommended to consult the vehicle's service manual or a professional technician to confirm compatibility and ensure proper installation.