Impreza 2.5 RS Coupe AWD F4-2.5L SOHC (2001)
6. Remove radiator upper bracket.
7. Support engine with a lifting device and wire ropes.
8. Lift-up the vehicle.
CAUTION: At this time, raise up wire ropes.
9. Remove under cover.
10. Drain engine oil.
Set container under the vehicle, and remove drain plug from oil pan.
11. Disconnect connector from rear oxygen sensor.