FIT - This rear oxygen sensor fits your LR3 (2007-2009) and Range Rover Sport/Sport Supercharged (2007-2009)NOTE - Thes efitments are from VIN 7A000001PRO TIP -Old oxygen sensors can cost you at the pump! To keep your emissions system working optimally and to maximize your Rover’s fuel economy, we recommend changing oxygen sensors every 60k miles.SAVE TIME -No cutting, splicing or reworking necessary!TIP -The rear sensors – also called the post-cat sensors – monitor the O2 content of exhaust gases leaving your Rover’s catalytic converter, ensuring the cat is working properly.