The 4-wire narrow-band oxygen sensor is a replacement sensor for 2012-2015 Toyota Avanza with the 1.5L I4 engine in the upstream position. It signals whether the exhaust is running rich or lean so the engine computer can trim fuel delivery. The wiring harness measures 300 mm (11.8 in.).

Walker Products 350-34717 Oxygen Sensor Features:

• Fits 2012-2015 Toyota Avanza with the 1.5L I4 engine
• 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, 300 mm (11.8 in.) overall length
• Female square connector at the harness end with 4 spade terminals
• Platinum electrode layer with a protective coating against combustion residue