The oxygen sensor installs in the downstream position on 2015-2018 Porsche Macan, 2017-2020 Porsche 718 Boxster, Cayman and 2017-2019 Porsche 911. It signals whether the exhaust is running rich or lean so the engine computer can trim fuel delivery. It uses a female square connector.

Walker Products 250-241207 Oxygen Sensor Features:

• Fits 2015-2018 Porsche Macan; 2017-2020 Porsche 718 Boxster, Cayman; 2017-2019 Porsche 911
• Engine coverage includes 2.0L H4, 2.5L H4, 3.0L V6, 3.0L H6, 3.6L V6 applications
• 4-wire narrow-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 500 mm (19.7 in.) overall length
• Female square connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue