Walker Products Oxygen Sensor P/N:350-34107

Keep closed-loop fuel control accurate with the Walker Products Oxygen Sensor 350-34107, a 4-wire heated narrow-band sensor engineered as an Original Equipment replacement for the specific application and fitment position. It's a direct-fit for a long list of BMW and Mercedes-Benz models, including the 2006-2013 BMW 325I (L6-2.5L), 2007-2013 BMW 328I (L6-3.0L), 2012-2016 BMW M5 (V8-4.4L), and 2001-2005 Mercedes-Benz C240 (V6-2.6L) — see the Buyer's Guide tab for the full list of 79 applications.

• Measures combustion efficiency: reads the oxygen content of the exhaust gas so the ECU can monitor the air-fuel ratio.
• Platinum electrodes: electrodes are made of a gas-permeable platinum layer.
• Protective coating: helps shield the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust.
• Fit details: 4-wire heated design, threaded mounting, 22 mm wrench size, bullet terminals, and a 500 mm wiring harness.

A worn sensor can show up as poor running, increased fuel consumption, higher exhaust emissions, or an illuminated malfunction indicator light (MIL); if a failed oxygen sensor is the cause, this replaces it — have the cause diagnosed first, and check the sensor, wiring harness, and connector for physical damage. Manufacturer part number 350-34107. Country of origin: China.