The Walker Products Oxygen Sensor (part number 350-34139) is a direct-fit replacement for 1994-1995 BMW vehicles with 3.0L and 4.0L 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.
- 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.
- Measures oxygen levels to fine-tune air-fuel mixture, improving fuel economy and saving costs.
- Determines the oxygen content of the exhaust gas, monitoring the air fuel ratio for combustion efficiency.
Specifications:
| Sensor Type | Narrow-Band |
| Number of Wires | 4 |
| Connector Type | Bullet |
| Connector Shape | Circle |
| Connector Gender | Female |
| 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) | 360 mm |
| Wire Gauge (AWG) | 20 AWG |
| Product Grade | Standard Replacement |
Fits: 1994-1995 BMW models including 530i, 540i, 740i, 740iL, and 840Ci — 3.0L and 4.0L 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.
