This 5-wire wide-band oxygen sensor fits select 2015-2019 BMW applications in the upstream position and measures the exhaust air-fuel ratio across a broad range so the engine computer can meter fuel precisely. A built-in heater brings the element to operating temperature quickly after a cold start.

Walker Products 350-35160 Oxygen Sensor Features:

• Fits 2015-2019 BMW 750Li; 2016-2019 BMW 750Li, 750i xDrive; 2017-2019 BMW 750i, Alpina B7; 2018 BMW 550i xDrive; 2018-2019 BMW M550i xDrive with the 4.4L V8 engine
• Sensor locations by application: B1S1, B2S1 (bank and sensor number)
• 5-wire wide-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 975 mm (38.4 in.) overall length
• Female oblong connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue