The oxygen sensor installs in the upstream position on 2013-2017 Seat Toledo with the 1.6L I4 engine. It measures the exhaust air-fuel ratio across a broad range so the engine computer can meter fuel precisely. A built-in heater brings the element to operating temperature quickly after a cold start.

Walker Products 250-25078 Oxygen Sensor Features:

• Fits 2013-2017 Seat Toledo with the 1.6L I4 engine
• Sensor location by application: B1S1 (bank and sensor number)
• 5-wire wide-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 550 mm (21.7 in.) overall length
• Female oblong connector at the harness end with 6 spade terminals
• Platinum electrode layer with a protective coating against combustion residue