4 Unscrew the fuel filter bracket fixing bolts. Use a drive socket #10. Use a ratchet wrench. 5 Remove the fuel filter fastening bracket. 6 Unscrew the fuel filter bracket. Use a drive socket #Е11. Replacement: engine oil and filter – Ford Focus MK2 diesel. AUTODOC experts recommend: Replace the oil filter every time when changing motor oil. Use only new O-rings during installation. Wear gloves to prevent contact with hot liquid. Please note: all work on the car – Ford Focus MK2 diesel – should be done with the engine switched off. DuO1ARd.