Keep the ECU reading accurate exhaust data with the Walker Products Oxygen Sensor 350-34928. This 4-wire, heated, narrow-band sensor is a direct-fit, application-specific replacement built for the downstream position, and it drops in on the 2017-2019 Audi A4, A4 Allroad and A4 Quattro (L4-2.0L), the 2013 Audi A4 Quattro (V6-3.0L), the 2018 Audi A5, 2018-2019 A5 Quattro and A5 Sportback, the 2016-2018 Audi A6 and A6 Quattro, the 2016-2019 Audi Q7, the 2017-2018 Porsche Macan, and the 2013-2014 Volkswagen Jetta (L4-1.4L). See the "Vehicles it fits" section for the full application list.
- Measures exhaust oxygen: determines the oxygen content of the exhaust gas, monitoring the air-fuel ratio for combustion efficiency.
- Protective coating: helps guard the electrode surfaces against contamination and erosion from combustion residue and particulates in the exhaust gases.
- Platinum-layer electrodes: coated with electrodes made of a gas-permeable platinum layer.
- Emissions feedback: monitors exhaust gases and reports the signal the ECU needs to fine-tune the air-fuel mixture.
Signs the original sensor may need replacing include a poor-running engine, increased fuel consumption or emissions, or an illuminated malfunction indicator light (MIL). Check the sensor, wiring harness, and connector for physical damage before installing. Country of origin: China.
Frequently Asked Questions
What does this oxygen sensor do?
It measures the oxygen content of the exhaust gas to monitor the air-fuel ratio and combustion efficiency, sending feedback the ECU uses to fine-tune the air-fuel mixture.
Is this a downstream or upstream sensor?
The 350-34928 is cataloged for the downstream position. Confirm the correct sensor for your vehicle in the "Vehicles it fits" section before ordering.
How many wires does it have and is it heated?
It is a 4-wire, heated, narrow-band oxygen sensor with spade terminals and an oblong male connector.
Will this fit my vehicle?
It's a specific-fit replacement for applications such as the 2017-2019 Audi A4 (L4-2.0L), 2016-2019 Audi Q7, 2017-2018 Porsche Macan, and 2013-2014 VW Jetta (L4-1.4L). Check the "Vehicles it fits" section.
What are signs this sensor may need replacing?
A rough-running engine, higher fuel use or emissions, or an illuminated MIL can indicate a failed sensor. Inspect the sensor, harness, and connector for damage before replacing.
