Hi I just bought a new to me 98 CRV. It's a 5spd manual with 160,000. The last owner said it needs an O2 Sensor and there is an exhaust leak in front, which I can smell when driving. It's a small pin hole. Nothing else is wrong with it except passenger window motor looks like it's about to die. It's slow to go down and up. I know I have to change oil and all the filters, the clutch had already been changed. What else should I do to make sure I can drive this CRV for a long time to come?