I have just over 90K miles and the 420 code came up recently. How soon should I have the O2 sensor or C convertor replaced? Is this something that will hurt the car in the long run or is this simply an emissions problem? I have not noticed any change in perfromance or gas mileage.

Both bulbs are burned out in my '03 Vibe. Does anyone now how to replace these bulbs? I have taken the lid off of the compartment but cannot figure out how to get the bulbs out. Please help!

I cannot find anything in the owner's manual regarding timing belt replacement. Do all Vibes have a timing chain? I have the standard Vibe with a 5 speed manual. We just passed the 90,000 mile barrier and need to clarify this.