True!BTW, you can rent an O2 Socket tool @ Autozone for free (free is nice when it comes to BMWs!). You give them $25 and when you bring it back, you get your $25 back! Get the tool, it will help you infinitely when doing this.
What code? If it's a code for the post-cat sensors, there may be not be anything wrong with them. I believe there's a TSB out for 330s regarding this... search the forums.I have a 2002, 330i with 114K miles. Am I ready for new oxygen sensors?
An engine warning light comes and goes(it started around 100K miles). Performance is still OK. With new O2 sensors, would my MPG improve?