This is a multi-purpose relay for AC compressor clutch, headlights, horn and more. Before spending much more money on expensive parts, try testing and replacing relays first! Better quality materials make some after market parts more resilient than many OEM parts that fail over time. This directly replaces your failed OEM part. It is located in the engine compartment in the front fuse box. Please check fitment by looking up your vehicle make and model to ensure compatibility.