The oxygen sensor installs on 2003-2010 Peugeot 307, 2013-2016 Peugeot 301, 2003-2004 Volvo S60, V70, XC70, XC90 and 2004 Volvo S80. 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 350-34448 Oxygen Sensor Features:

• Fits 2003-2010 Peugeot 307; 2013-2016 Peugeot 301; 2003-2004 Volvo S60, V70, XC70, XC90; 2004 Volvo S80
• Engine coverage includes 1.6L I4, 2.0L I4, 2.5L I5 applications
• Sensor location by application: B1S1 (bank and sensor number)
• 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, 1250 mm (49.2 in.) overall length
• Male rectangle connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue