The oxygen sensor installs in the upstream position on 1994 Saturn SC2, SL2 and SW2 with the 1.9L I4 engine. It signals whether the exhaust is running rich or lean so the engine computer can trim fuel delivery.

Walker Products 350-31033 Oxygen Sensor Features:

• Fits 1994 Saturn SC2, SL2, SW2 with the 1.9L I4 engine
• Sensor location by application: B1S1 (bank and sensor number)
• For California emissions vehicles
• 1-wire narrow-band oxygen sensor
• Unheated design
• M14x1.5 threaded mounting with a 19 mm hex, 140 mm (5.5 in.) overall length
• 110 mm (4.3 in.) wiring harness
• Male circle connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue