Part Number M52B20O1, 11000007943, 206S4. Engine Code M52 B20 (206S3);M52 B20 (206S4). Model 520I 5 SERIES SE E3 6 DOHC. Fuel Type PETROL. Engine Size 1991. That the cooling system is functioning without leaks and blockages, and that the correct new oil filter and oil are installed correctly.
