Is there a way to tell if this 7W93-10D893-AB Bluetooth module will be compatible with my 2004 XJR by VIN number? Have read on the forum that earlier VIN's may not be compatible or will have to be dealer flashed to make work. When I look up options for my VIN, comes up with car is prewired for phone. No phone currently installed. VIN is SAJWA73B44TG34479 Hate to purchase the module and have it not work if knowing prior is an option. Any help is appreciated!