The Walker Products Oxygen Sensor (part number 250-23011) is a direct-fit replacement for 1993-1996 Buick, Chevrolet, GMC, and Oldsmobile vehicles with 3.8L, 4.3L, and 5.7L engines. The oxygen sensor measures combustion efficiency based off the amount of oxygen in the exhaust gas.
Features:
- Coating prevents contamination and erosion of the electrode surfaces by combustion residue and particulates in the exhaust gases.
- Coated in with electrodes made of a gas-permeable platinum layer.
- Determines the oxygen content of the exhaust gas, monitoring the air fuel ratio for combustion efficiency.
- Monitors exhaust gases and reduces pollutants for a cleaner environment.
- Measures oxygen levels to fine-tune air-fuel mixture, improving fuel economy and saving costs.
Specifications:
| Sensor Type | Narrow-Band |
| Number of Wires | 3 |
| Connector Shape | Oblong |
| Terminal Gender | Female |
| Mounting Style | Threaded |
| Thread Size | M18 - 1.5 |
| Hex Size (mm) | 22 mm |
| Heated | Yes |
| Fit Type | Direct Fit |
| Wire Length (mm) | 325 mm |
| Wire Gauge (AWG) | 20 AWG |
Fits: 1993-1996 Buick, Chevrolet, GMC, Oldsmobile, and Pontiac models including Park Avenue, Regal, Astro, C1500, C1500 Suburban, C2500, C2500 Suburban, G10 and more — 3.8L, 4.3L, and 5.7L engines.
Confirm the year, make, model, and engine against your vehicle before ordering. Full application data is shown in the fitment lookup on this page.
WARNING: This product can expose you to chemicals, including Nickel and Nickel Alloyed Stainless Steel, which are known to the State of California to cause cancer or birth defects or other reproductive harm.
