This 4-wire narrow-band oxygen sensor fits select 1993-2008 Acura, Buick, Cadillac, Chevy and other applications and 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 350-34128 Oxygen Sensor Features:

• Fits 1996-1999 Acura SLX, Chevy C1500, C1500 Suburban, C2500, K1500, K1500 Suburban, GMC C1500, C1500 Suburban, C2500, K1500, K1500 Suburban, Isuzu Trooper
• Fits 1993-1996 Buick Regal, Oldsmobile Cutlass Supreme
• Also fits select Acura, Buick, Cadillac, Chevy, Daewoo, GMC, Honda, Isuzu, Oldsmobile and Pontiac applications
• Sensor locations by application: B1S1, B1S2, B2S1, B2S2 (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, 375 mm (14.8 in.) overall length
• Female oblong connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue