We have a 2007 Nissan Versa with around 40,000 miles.
At 18,000 miles we were told we needed a new Oxygen sensor, which was covered under warranty, now at 40,000 miles we have the exact same problem, this time it is not covered and will cost around $300, and has a 1 year or 18,000 mile warranty. seems to me it is going to be an expensive fix every 20,000 miles or so to replace Oxygen sensor.
Any one else having this problem