The 4-wire narrow-band oxygen sensor is a replacement sensor for 2001-2003 Chevy Astra, 2002-2005 Chevy Zafira, 2010-2016 Porsche Panamera, 2013-2016 Porsche Boxster and 2014-2016 Porsche Cayman. It signals whether the exhaust is running rich or lean so the engine computer can trim fuel delivery. A built-in heater brings the element to operating temperature quickly after a cold start.

Walker Products 350-34108 Oxygen Sensor Features:

• Fits 2001-2003 Chevy Astra; 2002-2005 Chevy Zafira; 2010-2016 Porsche Panamera; 2013-2016 Porsche Boxster; 2014-2016 Porsche Cayman
• Used in both upstream and downstream positions, depending on application
• 4-wire narrow-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 1225 mm (48.2 in.) overall length
• Female oblong connector at the harness end with 4 spade terminals
• Platinum electrode layer with a protective coating against combustion residue