380SL O2 Sensor - How Often Should It Be replaced?

[ezrider]

How often should this sensor be replaced?

What brand is best?

Thank you.

[maheath]

The simple answer is that it should be replaced when it fails. To test yours, go to this page:
http://www.peachparts.com/Wikka/EngineControls

Use only replacement Bosch sensors. Do a search in the Tech forum, because you can use the Bosch O2 sensor from a Ford Mustang (302?) and it's a lot cheaper.