Petrol and 48V mild hybrid (MHEV) servicing
Many BMW petrol engines, including 48V mild hybrid (MHEV) variants, follow a familiar routine of regular engine oil and oil filter changes plus inspections of belts, cooling system and brakes. Petrol models also rely on a healthy ignition system, so spark plugs (where fitted) and air filtration matter for smooth running and fuel economy. On MHEV cars, the 48V system adds extra cooling and electrical components, so it is worth ensuring software updates, wiring condition and auxiliary battery health are checked at service time. Always match the correct oil specification and service reset procedure to the exact engine and model year.