Keep the engine's air-fuel ratio dialed in with the Walker Products Oxygen Sensor 350-31011. It installs as an upstream (pre-catalytic-converter) sensor and drops in as a direct-fit replacement for the 1984-1985 Volkswagen Vanagon.
Mounted in the exhaust stream ahead of the catalyst, this upstream sensor reads the oxygen content of the exhaust and reports it to the engine control unit, which uses that signal to trim fueling toward the correct air-fuel ratio.
Signs the sensor may need replacing include a rough idle, reduced fuel economy, or an illuminated check-engine light. Because those symptoms can have other causes, diagnose the fault before replacing; if the original upstream oxygen sensor is confirmed faulty, this 350-31011 replaces it.
Manufacturer part number 350-31011 (also 35031011).
Where does this oxygen sensor install?
It's an upstream sensor, mounted in the exhaust ahead of the catalytic converter on the listed 1984-1985 Volkswagen Vanagon.
What vehicles does the 350-31011 fit?
It's a direct-fit replacement for the 1984-1985 Volkswagen Vanagon. Check the Buyer's Guide tab to confirm it matches your vehicle.
What does an upstream oxygen sensor do?
It measures the oxygen content of the exhaust before the catalytic converter and sends a voltage signal the ECU uses to adjust the air-fuel ratio.
What are signs this sensor may need replacing?
A rough idle, poor fuel economy, or a check-engine light can point to a failing sensor, but have the cause diagnosed first since these symptoms have other possible causes.
Is 350-31011 a manufacturer or OE part number?
350-31011 is the Walker Products manufacturer part number for this oxygen sensor.
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.
