Walker Products 250-25190 oxygen sensor for the 2025-2026 Hyundai Sonata 4-cylinder 2.5L and other vehicles measures exhaust oxygen to gauge combustion efficiency. This Walker Products oxygen sensor sends the ECU the diagnostic feedback it requires.
- Heated wide-band sensor that determines the oxygen content of the exhaust gas
- Measures oxygen levels so the air-fuel mixture can be fine-tuned for fuel economy
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates
- Electrodes made of a gas-permeable platinum layer
- Monitors exhaust gases to help reduce pollutants
Quick facts
- Part: Walker Products 250-25190 oxygen sensor
- Fits: 2025-2026 Hyundai Sonata 4-cylinder 2.5L and other vehicles
- Position: Upstream, upstream right, upstream rear
- Condition: New
A failing sensor can show up as rough running, higher fuel use or a lit malfunction indicator light. A leaking exhaust, a damaged wiring harness or connector, or a fault in another engine management part can cause similar signs, so find the cause before you buy a new sensor.
Fits
This oxygen sensor is listed for a wide range of Hyundai, Kia and Genesis models, including the 2021-2024 Kia Sorento 4-cylinder 2.5L and the 2021-2026 Hyundai Santa Fe 4-cylinder 2.5L. Every one of those cars takes a single sensor, which is what this listing holds. If your car isn't named here, look it up in the "Vehicles it fits" section to see whether it is covered.
Specifications
Fit and size
- Position: upstream, upstream right, upstream rear
- Quantity per vehicle: 1
- Terminals: 6 spade, male
- Wires: 5
- Connector: female, oblong shape
Build and materials
- Sensor type: wide-band
- Heated: yes
- Electrodes: gas-permeable platinum layer, coated
- Condition: new
- Country of origin: United States
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is this the right oxygen sensor for a 2025-2026 Hyundai Sonata 4-cylinder 2.5L?
Yes. Walker Products 250-25190 is listed for the 2025-2026 Hyundai Sonata 4-cylinder 2.5L, and also for the 2021-2022 Sonata with that engine. It takes one sensor.
Does this oxygen sensor fit the 2021-2026 Hyundai Santa Fe 4-cylinder 2.5L?
Yes. Walker Products 250-25190 is listed for the 2021-2026 Hyundai Santa Fe 4-cylinder 2.5L, and that engine takes a single sensor.
Is the Walker Products 250-25190 a heated wide-band sensor?
Yes. It is a heated wide-band oxygen sensor with six spade terminals and five wires, and the terminals are male on a female oblong connector.
What signs can a failing wide-band oxygen sensor show?
The engine can run poorly, use more fuel or turn on the malfunction indicator light. A shop can read the fault codes the ECU stores for the sensor.
What does the coating on this oxygen sensor do?
The coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust. The electrodes use a gas-permeable platinum layer.
