My sister has a 1997 Metro with almost 100k miles on it. Recently her check engine light came on and according to the mechanic she needs a new upstream O2 sensor. He also reccomended a timing belt change and a tune up. He quoted $700 for everything. Is that a reasonable price? He's a AAA-approved mechanic so I believe he'd do a legit tuneup, including fuel filter and new pcv valve, etc.
If the timing belt is going to be changed, how much extra time would it take to replace the water pump on this vehicle? On my car at least it's pretty easy to do if the belt is off and probably worth it. But on the Metro?
Thanks!