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Hi All,

I've an error code b1 s1 lambda probe failure, i've ordered a new one but is there a logical way of establishing which one bank one is and which is sensor one, i know there are 4 sensors and i'm going to assume that sensor one will be before the cat but not sure which is bank 1?

Cheers,

Mat
 

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Hi there,

Your car is the V6 3.2 Litre R32,

Bank 1 Sensor 1, I would assume would be the Exhaust Branch from Cyls 1-3, you are correct when you say it would be "Pre-cat" , hope this helps?
 
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