This 5-wire wide-band oxygen sensor fits 2005-2006 Seat Altea and 2006-2017 Seat Toledo in the upstream position and 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 350-35104 Oxygen Sensor Features:

• Fits 2005-2006 Seat Altea; 2006-2017 Seat Toledo
• Engine coverage includes 1.6L I4, 2.0L I4 applications
• 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 square connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue