The Walker Products Oxygen Sensor (part number 250-23005) is a direct-fit replacement for 1990-1995 Buick, Chevrolet, GMC, and Oldsmobile vehicles with 3.1L, 4.3L, and 5.7L engines. The oxygen sensor measures combustion efficiency based off the amount of oxygen in the exhaust gas.
Features:
- Monitors exhaust gases and reduces pollutants for a cleaner environment.
- Determines the oxygen content of the exhaust gas, monitoring the air fuel ratio for combustion efficiency.
- Coating prevents contamination and erosion of the electrode surfaces by combustion residue and particulates in the exhaust gases.
- Measures oxygen levels to fine-tune air-fuel mixture, improving fuel economy and saving costs.
- Coated in with electrodes made of a gas-permeable platinum layer.
Specifications:
| Sensor Type | Narrow-Band |
| Number of Wires | 3 |
| Number of Terminals | 3 |
| Connector Type | Ring |
| Connector Shape | Oblong |
| Connector Gender | Male |
| Terminal Gender | Male |
| 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: 1990-1995 Buick, Chevrolet, GMC, Oldsmobile, and Pontiac models including Regal, Astro, Blazer, C1500, C1500 Suburban, C2500, C2500 Suburban, Caprice and more — 3.1L, 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.
