Good Morning Mr Wilde, thank you for your review, we appreciate all feedback. If the fault is covered under your warranty policy the initial investigation/diagnostic fee will be covered. If the fault is not covered under your warranty policy you will be charged the initial investigation/diagnostic fee. If you have any further questions regarding this please don't hesitate to contact us on 0345 641 9790 or at bmwwarrantysales@allianz-assistance.co.uk. Kind Regards, Nicole. Senior Coordinator.