The oxygen sensor installs in the upstream position on 2011-2020 Chevy Tornado, 2004-2005 Fiat Palio and 2013 Fiat Uno. 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 250-24119 Oxygen Sensor Features:

• Fits 2011-2020 Chevy Tornado; 2004-2005 Fiat Palio; 2013 Fiat Uno
• Engine coverage includes 1.4L I4, 1.6L I4, 1.8L I4 applications
• Sensor location by application: B1S1 (bank and sensor number)
• 4-wire narrow-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 985 mm (38.8 in.) overall length
• Female oblong connector at the harness end with 4 spade terminals
• Platinum electrode layer with a protective coating against combustion residue