05-11-2015, 05:16 AM
|
#4
|
|
Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,277
|
Quote:
Originally Posted by hancock1701
Hey guys,
The BMW Service Manual for a 2009 3 series says that their O2 sensors have a warranty of 100,000 miles. They also recommend changing the O2 sensors at 120,000 miles because, according to the manual, O2 sensors wear based on miles driven.
I don't like to replace good, working parts. However, I want to keep my car in good working conditions, and always try to do all the preventative maintenance so that there won't be long term damage to the system. As I understand, the pre cat O2 sensors are responsible for monitoring the air fuel mixture, and can cause not so ideal conditions downstream when they are not at their 100%. My car is currently at 140,000 miles, which to me is a reasonable service life for an O2 sensor. What do you guys think?
|
Change them when the car codes and tells you they need to be changed.
__________________
“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
|
|
|