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Should I replace all 4 sensors and what am I looking at costs... 2000 SL500 w 11,000 miles


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MBFanatic  1 year 3 months ago

You don't need to replace all four oxygen sensors. Just replace the one that is defective or throwing a code. Try to get an OEM sensor. They are not that expensive online. Note that there is a chance that the catalytic converter is not working properly and replacing the O2 sensor will not fix it.

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