Keep the engine control module fed with accurate exhaust readings using the Walker Products Oxygen Sensor 350-34196 (also 35034196), a heated 4-wire narrow-band unit that drops in as a direct-fit replacement for the 1997-2000 Mazda Millenia (V6-2.5L). Walker builds each part number as an OE replacement engineered for the specific application and mounting position.
Narrow-band sensing: Measures the oxygen content of the exhaust gas to monitor the air-fuel ratio for combustion efficiency.
Heated 4-wire design: A heated element reaches operating temperature quickly so the ECU can act on the feedback.
Protective coating: Guards the electrode surfaces against contamination and erosion from combustion residue and particulates in the exhaust.
Platinum electrodes: Coated with a gas-permeable platinum layer for the sensing signal.
It uses spade terminals in a female, square connector with a threaded mount (22 mm wrench). A worn sensor may cause the engine to run poorly, increase fuel consumption or emissions, or illuminate the malfunction indicator lamp (MIL); those signs can have other causes, so diagnose the fault codes and check the sensor, wiring, and connector for damage before replacing. If a failed oxygen sensor is the cause, this restores accurate feedback to the ECU. Country of origin: China.
Frequently Asked Questions
What vehicle does the 350-34196 fit?
It is a direct-fit replacement for the 1997-2000 Mazda Millenia with the V6-2.5L engine. Check the Buyer's Guide tab to confirm fitment for your vehicle.
Is this a heated sensor and how many wires does it have?
Yes. It is a heated, 4-wire narrow-band oxygen sensor, so it includes a heater circuit that helps it reach operating temperature quickly.
What does this oxygen sensor do?
It measures the oxygen content of the exhaust gas to monitor the air-fuel ratio, providing the combustion-efficiency feedback the ECU uses to adjust the mixture.
What are signs the oxygen sensor may need replacing?
Poor engine running, increased fuel consumption or emissions, or an illuminated MIL. These can have other causes, so diagnose the codes and inspect the sensor, wiring, and connector first.
How does it mount and connect?
It has a threaded mount installed with a 22 mm wrench and uses spade terminals in a female, square connector.
Walker Products 350-34460 Oxygen Sensor 4-W Direct Fit Narrow-BandThe oxygen sensor measures combustion efficiency based off the amount of oxygen in the exhaust gas.Walker Products Engine Management...
Walker Products 350-35077 Oxygen Sensor 5-W Wide-BandThe oxygen sensor measures combustion efficiency based off the amount of oxygen in the exhaust gas.Walker Products Engine Management and...
Walker Products 350-34541 Oxygen Sensor 4-W Direct Fit W/Flange Narrow BandThe oxygen sensor measures combustion efficiency based off the amount of oxygen in the exhaust gas.Walker Products Engine...
Walker Products 350-34073 Oxygen Sensor 4-W Direct Fit Narrow-BandThe oxygen sensor measures combustion efficiency based off the amount of oxygen in the exhaust gas.Walker Products Engine Management...
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.
