DISCOVERY RANGE ROVER SPORT AND L405 BRAKE LIGHT SWITCH These switches are responsible for much more than just controlling the brake light function and can be a common cause of many faults on your vehicle. Symptoms of a faulty brake switch can include: - Not releasing automatic transmission from park - Engine not starting - ABS and emergency braking functions (ABS light may come on the dash) - Brake lights not working - Brake lights stuck on - Cruise control not working Suitable for.. - Discovery 3 all models - Discovery 4 to chassis GA801063 - Range Rover Sport to chassis DA814631 - Range Rover L405 to chassis GA267154 Contents / Part numbers.. - 1 x BRAKE LIGHT SWITCH - XKB500110.