Hi everyone,I need to change 02 sensor how much change it will make on engine?

How long has it been since you last changed it?

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k

when i got the car it has 132000 mile, now 195.000 dont know before that

I'd say its probably time, even more so if you have no history prior to 132k. The OEM Bosch one is ~$120. If you are handy with wires and solder, you can solder the one from a 1990 Mustang GT as it uses the same sensor for ~$35 to the factory harness. MB just decided to charge $90 for the wire

The "standard" is every 60k...but I've heard the real interval is ~100k assuming no idle or mpg issues.

__________________
2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k

Thanks for info,has to be bosch not after market .why not A.market?

I would stick with Bosch, the price difference is not worth going away from OE.

__________________
2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k