Walker Products 350-34788 oxygen sensor for the 2015-2018 Volkswagen Golf 4-cylinder 1.8L and other vehicles measures the oxygen in the exhaust gas to track combustion efficiency. This Walker Products oxygen sensor is a 4-wire, direct-fit, narrow-band unit made for the downstream position.
- Monitors exhaust gases to help reduce pollutants
- Coating protects the electrode surfaces from combustion residue and particulates in the exhaust gas
- Measures oxygen levels so the air-fuel mixture can be fine-tuned for fuel economy
- Electrodes with a gas-permeable platinum layer
- Built for its specific application and install position, with the diagnostic feedback the ECU expects
Quick facts
- Part: Walker Products 350-34788 oxygen sensor
- Fits: 2015-2018 Volkswagen Golf 4-cylinder 1.8L and other vehicles
- Position: Downstream
- Condition: New
A failing sensor can show up as rough running, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light. Those signs alone do not prove this sensor is at fault, since a vacuum leak can produce similar ones. With the engine off and cool, look over the sensor, its wiring harness and connector for physical damage.
Fits
This is a direct-fit replacement for vehicles that include the 2015-2018 Volkswagen Golf 4-cylinder 1.8L, the 2020-2023 Audi R8 V10 5.2L and the 2021-2023 Volkswagen Teramont 4-cylinder 2.0L. The Golf, R8 and Teramont all call for one sensor, and this listing is a single sensor. Other Volkswagen, Audi and Seat models share it, so open the "Vehicles it fits" section and look up your exact model and engine.
Specifications
Fit and size
- Position: downstream
- Quantity per vehicle: 1
Build and materials
- Type: narrow-band, direct fit
- Wires: 4
- Electrodes: gas-permeable platinum layer
- Condition: new
Frequently Asked Questions
Will this VW Golf oxygen sensor fit a 2015-2018 Volkswagen Golf 4-cylinder 1.8L?
Yes. Walker Products 350-34788 is listed for the 2015-2018 Volkswagen Golf 4-cylinder 1.8L, and that car takes one sensor.
Is the Walker Products 350-34788 an upstream or downstream sensor?
Downstream. The catalog lists Walker Products 350-34788 for the downstream position.
Is this a narrow-band or wideband oxygen sensor?
Narrow-band. This oxygen sensor is a 4-wire, direct-fit narrow-band unit.
What can a failing downstream oxygen sensor cause?
Rough running, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light can point to a failed sensor. Newer vehicles may also store a fault code in the ECU.
What is the coating on this oxygen sensor for?
The coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gas. The electrodes have a gas-permeable platinum layer.
