Walker Products Oxygen Sensor P/N:350-34546
Walker Products 350-34740 left oxygen sensor for the 2015-2017 Audi A8 Quattro V6 3.0L and other vehicles senses the oxygen in the exhaust gas to report combustion efficiency.
A failing sensor can show up as rough running, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light. A damaged harness or connector can give similar symptoms, so with the engine off and cool, look over the sensor, wiring harness and connector for physical damage before replacing it. This listing is one sensor for the left position; a sensor for another position is a separate part.
This oxygen sensor fits the 2015-2017 Audi A8 Quattro V6 3.0L, the 2010-2012 Seat Altea 4-cylinder 1.4L and the 2008-2009 Audi A3 4-cylinder 1.8L.
Fit and size
Build and materials
Is this an oxygen sensor for the 2008-2009 Audi A3 4-cylinder 1.8L?
Yes. Walker Products 350-34740 is listed for the 2008-2009 Audi A3 4-cylinder 1.8L, and this listing is one sensor for the left position.
Is this Walker Products oxygen sensor a narrow-band type?
Yes. Walker Products 350-34740 is a 4-wire, direct-fit narrow-band oxygen sensor.
What thread does this oxygen sensor have?
This oxygen sensor has an M18 - 1.5 thread.
How do I tell if this narrow-band oxygen sensor is failing?
A failed sensor can make the engine run poorly, raise fuel consumption or exhaust emissions, or light the malfunction indicator light. Newer vehicles may also store fault codes in the ECU that relate to the sensor.
What protects the electrodes on this oxygen sensor?
The electrode surfaces carry a coating that guards against contamination and erosion from combustion residue and particulates in the exhaust. The electrodes themselves are a gas-permeable platinum layer.
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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.