The oxygen sensor installs in the upstream position on 2017-2020 Porsche 718 Boxster and Cayman with the 2.0L H4 or 2.5L H4 engines. It measures the exhaust air-fuel ratio across a broad range so the engine computer can meter fuel precisely. It uses a male oblong connector.

Walker Products 350-35121 Oxygen Sensor Features:

• Fits 2017-2020 Porsche 718 Boxster, Cayman with the 2.0L H4, 2.5L H4 engines
• 5-wire wide-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 1175 mm (46.3 in.) overall length
• Male oblong connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue