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  1. Leafsfan117

    Which o2 (Lambda) Sensor do I replace?!

    Hi guys, this is my first post and won't be my last due to having my work cut out for me with an Audi A3 8L I purchased with the intention of repairing. Apologies if there is already a thread for this, or if my question is really dumb! Okay so my revs have been hunting on starting the car, and...