The Walker Products Oxygen Sensor (part number 350-34215) is a direct-fit replacement for 2001-2014 BMW and Mercedes-Benz vehicles with 2.5L, 3.0L, and 4.8L 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.
- 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.
- 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.
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) | 425 mm |
| Wire Gauge (AWG) | 22 AWG |
| Product Grade | Standard Replacement |
Fits: 2001-2014 BMW and Mercedes-Benz models including 323i, 525i, 525xi, 530i, 530xi, 550i, 650Ci, 650i and more — 2.5L, 3.0L, and 4.8L 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.
