O2 Sensor Replacement? when should it be done.

Here are some fast and reliable diagnostic procedures which I use to check out my http://www.oxygensensorwholesale.com/alfa-romeo.html (Alfa-Romeo oxygen sensor). A great time to do this is when I am performing a tune-up. The following symptoms will help tip you off to a failed oxygen sensor:

# Surging and/or hesitation
# Poor or a decline in fuel econmy
# Failed exhaust emissions testing
# Premature failure of the catalytic converter (rotten egg smell)
# Indicator "idiot" check engine lights coming on

Here are the replacement intervals of some most O2 sensor on the market... Hope this helps...

Replace unheated oxygen sensors on 1976 to early 1990s vehicles every 30,000 - 50,000 miles Heated (1st generation) oxygen sensors on mid-1980s to mid-1990s vehicles every 60,000 miles Heated (2nd generation) oxygen sensors on mid-1990s and newer vehicles every 100,000 miles.
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