where is the oxygen sensor on the 1994 Audi quattro 100
on the exshust pipe,some are down below manafold,in front of cat conveter,and behind muffler.some vehichles have as many as 3 or 4 if replaceing one, replace all.not cheep where im at $40.00 a sensor.
Yes, depends which one you mean. There are usually at least one in the manifold, one right in front of the catalytic convertor, and one to the rear of it.
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