The BMW Z4 Roadster Service Cost (5 Year) of sDrive 20i Petrol engine. Service interval is 1 year & 8,000 km. Warranty  The BMW Z4 Roadster is offered with 3 years / unlimited km of standard warranty BMW Z4 Roadster 5 Year Service Cost  No. Of Service  Schedule  sDrive 20i Petrol 1st service 1 Year … Continue reading BMW Z4 Roadster