Left Oxygen Sensor for 2011-2012 BMW 740i & More - Walker 250-25048

Walker Products 250-25048 left oxygen sensor for the 2011-2012 BMW 740i 6-cylinder 3.0L and other vehicles measures the oxygen content of the exhaust gas. This Walker Products oxygen sensor is a wide-band unit that monitors the air-fuel ratio for combustion efficiency.

• Monitors exhaust gases to help reduce pollutants
• Measures oxygen levels so the air-fuel mixture can be fine-tuned for fuel economy
• Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates
• Electrodes made of a gas-permeable platinum layer
• Built for one specific application and position on the vehicle, and returns the diagnostic feedback the ECU requires

Quick facts

• Part: Walker Products 250-25048 oxygen sensor
• Fits: 2011-2012 BMW 740i 6-cylinder 3.0L and other vehicles
• Position: Upstream, downstream, upstream left
• Condition: New

A failing sensor can show up as rough running, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light. These signs alone do not prove the sensor is the problem, since a damaged wiring harness or connector can cause them too.

Fits

This sensor is listed for a wide range of BMW and Mercedes-Benz models, including the 2011-2012 BMW 740Li 6-cylinder 3.0L and the 2008-2010 BMW 535i 6-cylinder 3.0L. The 2011-2012 BMW 740Li 6-cylinder 3.0L takes one sensor, and this listing is a single sensor. For any other car, look up your year and engine in the "Vehicles it fits" section.

Specifications