The 4-wire narrow-band oxygen sensor is a replacement sensor for 2006-2010 Chevy Optra, 1996-1997 Ford Probe, Mazda MX-6, 1996-2000 Mazda 626, 2000-2006 Mazda MPV, 2006-2008 Suzuki Forenza and Reno. 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 350-34048 Oxygen Sensor Features:

• Fits 2006-2010 Chevy Optra; 1996-1997 Ford Probe, Mazda MX-6; 1996-2000 Mazda 626; 2000-2006 Mazda MPV; 2006-2008 Suzuki Forenza, Reno
• Engine coverage includes 2.0L I4, 2.5L V6, 3.0L V6 applications
• Sensor location by application: B1S1 (bank and sensor number)
• Used in the center 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, 380 mm (15 in.) overall length
• Male/female square connector at the harness end with 4 spade terminals
• Platinum electrode layer with a protective coating against combustion residue