jamieg Posted June 20, 2008 Report Share Posted June 20, 2008 Hi - can anyone post up any diagrams for the O2 sensors for an A3 please, need to replace sensor B1 S1 but not got a clue where it is. Grrr my maintenance manual dvd did not arrive as expected..... Thanks in advance Link to comment Share on other sites More sharing options...
Paul Posted June 24, 2008 Report Share Posted June 24, 2008 No diagrams but i might be able to elaborate... B1 is bank one. Assuming your profile is current, then your 1.8 TQ A3 is not a "V" engine and only has 1 bank of cylinders , so thats that part sorted. O2 sensors are in the exhaust. As there are 2 , there will be one before , and one after the CAT so should be easily found. Very often there is a jointbox under the car for the elctrical connections. As for S1 (sensor 1) I would hazzard a guess its the one before the cat, ie the first, but please confirm, as i dont know if the two sensors are the same type.... Link to comment Share on other sites More sharing options...
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