Walker Products 350-34138 oxygen sensor for the 2000-2005 Volkswagen Passat V6 2.8L and other vehicles measures the oxygen content of the exhaust gas. Each part number is made for its specific application and fitment position, and it returns the diagnostic feedback the ECU needs.
- Monitors the air-fuel ratio in the exhaust gas for combustion efficiency
- Measures oxygen levels to fine-tune the air-fuel mixture and support fuel economy
- Monitors exhaust gases to help reduce pollutants
- Electrodes made of a gas-permeable platinum layer
- Electrode coating prevents contamination and erosion of the electrode surfaces by combustion residue and particulates
Quick facts
- Part: Walker Products 350-34138 oxygen sensor
- Fits: 2000-2005 Volkswagen Passat V6 2.8L and other vehicles
- Position: Downstream
- Condition: New
A failing sensor can make the engine run poorly, raise fuel consumption or exhaust emissions, or turn on the malfunction indicator light, and newer vehicles may store a fault code for it. Those symptoms have other possible sources, so start by looking over the sensor, wiring harness and connector for physical damage with the engine off and cool.
Fits
Besides the 2000-2005 Passat V6 2.8L, this direct-fit oxygen sensor fits the 2000-2001 Audi A6 Quattro V6 2.7L or 2.8L, the 2000-2004 A6 Quattro V8 4.2L and the 2003-2004 Audi RS6 V8 4.2L. These engines take one sensor, and this listing is a single sensor. If your car isn't named here, look up your year, model and engine in the "Vehicles it fits" section.
Specifications
Fit and size
- Position: Downstream
- Quantity per vehicle: 1
- Number of wires: 4
Build and materials
- Sensor type: Narrow-band
- Electrodes: gas-permeable platinum layer
- Condition: New
Frequently Asked Questions
Is this VW Passat O2 sensor the right one for a 2000-2005 Volkswagen Passat V6 2.8L?
Yes. Walker Products 350-34138 is a direct-fit Passat oxygen sensor for the 2000-2005 V6 2.8L. The listing is one sensor, and that engine takes one.
Is this the Audi A6 Quattro oxygen sensor for a 2000-2004 V8 4.2L?
Yes. This sensor fits the 2000-2004 Audi A6 Quattro V8 4.2L, and it also fits the 2000-2001 A6 Quattro V6 2.7L or 2.8L. Each takes one.
Is the Walker Products 350-34138 a narrow-band sensor and how many wires does it have?
Yes. Walker Products 350-34138 is a narrow-band sensor with 4 wires, and its position is downstream.
What can a worn downstream oxygen sensor do to the engine?
The engine can run poorly, fuel consumption can rise, or the malfunction indicator light can come on. Newer vehicles also store a fault code in the ECU that can relate to the sensor.
What is the coating on this oxygen sensor's electrodes for?
The electrodes are made of a gas-permeable platinum layer. The coating prevents contamination and erosion of the electrode surfaces by combustion residue and particulates in the exhaust.
