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Message: <blockquote data-quote="tike" data-source="post: 2461821" data-attributes="member: 800951"><p>trace the exhaust from under the engine to the front, behind the grille. there should be a can shape just before the exhaust enters the engine the sensor is screwed into the top of this can. you may need to take off the bumper to get proper access to the O2 sensor. use a vacuum cleaner nozzle to clean out the cat while you have the sensor out. do a search on e bay for the O2 lambda sensor for 01 polo to make sure you have the right one</p></blockquote><p></p>