...under the hood on the left side (when standing at the front looking at the motor) on the exhaust manifold. The other two or called the post-cat or cold side. They are in the exhaust pipes coming ...
How do I remove the manifold on my 01 bmw 525i ? Try watching some YouTube educational videos. I hope this helps! https://www.youtube.com/watch?v=B-TLgNCmTlY
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