Walker Products Oxygen Sensor P/N:250-21054
Walker Products 250-24416 oxygen sensor for the 1997-1999 Audi A8 V8 3.7L and other vehicles measures the oxygen content of the exhaust gas. It reports to the ECU so combustion efficiency can be monitored.
A failing oxygen sensor can show up as rough running, higher fuel use or a check engine light. These signs alone do not prove the sensor is the problem, since an exhaust leak can cause similar readings. If the sensor is the cause, this one replaces it. The sensor, wiring harness and connector should also be checked for physical damage.
This sensor fits the 1997-1999 Audi A8 V8 3.7L, the 1997-1999 Audi A8 Quattro V8 4.2L and the 1996-1997 Audi A6 Quattro V6 2.8L, in the downstream left and downstream right positions. This listing is one sensor, and the 1997-1999 Audi A8 V8 3.7L takes one.
Fit and size
Build and materials
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Does this oxygen sensor fit the 1997-1999 Audi A8 V8 3.7L?
Yes. Walker Products 250-24416 is a direct-fit oxygen sensor for the 1997-1999 Audi A8 V8 3.7L, in the downstream left or downstream right position, and the car takes one.
Is this the oxygen sensor for the 1996-1997 Audi A6 Quattro V6 2.8L?
Yes. This downstream oxygen sensor is listed for the 1996-1997 Audi A6 Quattro V6 2.8L, one per car, for the left or right downstream position.
Is this Walker Products oxygen sensor narrow-band or wideband?
It is narrow-band with four wires. Walker Products 250-24416 has electrodes made of a gas-permeable platinum layer.
Can a bad downstream oxygen sensor turn on the check engine light?
It can. A failed sensor can also show up as rough running or higher fuel use, and a shop can read the stored codes to see whether the sensor is involved.
What does the coating on this oxygen sensor protect against?
The coating keeps combustion residue and particulates in the exhaust gases from contaminating or eroding the electrode surfaces.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.