Walker Products Oxygen Sensor P/N:350-34354
Walker Products 350-31042 oxygen sensor for the 1995-1997 Volkswagen Golf 4-cylinder 1.8L and other vehicles measures oxygen in the exhaust gas to gauge combustion efficiency.
A failing sensor can show up as rough running, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light, and newer vehicles may store a related fault code. These signs alone do not prove the sensor is the problem, since an exhaust leak can cause similar symptoms. Look the sensor, wiring harness and connector over for physical damage.
This sensor fits the 1995-1997 and 1999 Volkswagen Golf 4-cylinder 1.8L and the 1995 and 2002-2005 Volkswagen Derby 4-cylinder 1.8L, and each of those engines takes one. This listing is a single upstream sensor.
Fit and size
Build and materials
Is this the oxygen sensor for a 1995-1997 VW Golf with the 4-cylinder 1.8L?
Yes. Walker Products 350-31042 fits the 1995-1997 Volkswagen Golf 4-cylinder 1.8L as the upstream sensor, one per engine.
Does the 2002-2005 Volkswagen Derby 4-cylinder 1.8L take this sensor too?
Yes. The 2002-2005 Volkswagen Derby 4-cylinder 1.8L takes one Walker Products 350-31042 sensor in the upstream position.
Is this Walker Products oxygen sensor upstream or downstream?
Upstream. It is a narrow-band sensor made for the upstream position, and the listing is for one sensor.
What does the coating on this oxygen sensor's electrodes do?
The coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gas. The electrodes themselves are a gas-permeable platinum layer.
Will the ECU store a code when this narrow-band oxygen sensor fails?
Yes, newer vehicles store fault codes in the ECU, and some relate to the affected sensor. Poor running, higher fuel use or a lit warning light can go along with a failed sensor.
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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.