The oxygen sensor measures combustion efficiency based off the amount of oxygen in the exhaust gas.

Walker Products Engine Management and Oxygen/Air-Fuel sensors have been engineered and developed to be an Original Equipment Manufacturers replacement for many vehicles worldwide. Every part number is manufactured for the specific application, fitment position on the vehicle, and will provide the relevant diagnostic system feedback as required by the ECU. Newer vehicles will store fault codes in the ECU, some will relate to the affected sensor and its associated systems. A failed sensor might make itself known by causing the engine to run poorly, increase fuel consumption, exhaust emissions, or illuminating a (MIL) malfunction indicator light. The sensor, wiring harness, and connector should also be checked for physical damage. This will most likely also cause their operational life to be shortened. We are an Automotive ISO9001/TS 16949 certified company, with un-paralleled customer service, marketing, and shipping. Our electronic and paper catalogs are designed for todays fast paced marketplace, along with our eye catching packaging. Since 1946, Walker Products has been the number one choice for the engine management sensors and fuel system components needed for your vehicle. -¬ 2023 Walker Products Inc. All rights reserved.

• Coated in with electrodes made of a gas-permeable platinum layer.
• Measures oxygen levels to fine-tune air-fuel mixture, improving fuel economy and saving costs.
• Monitors exhaust gases and reduces pollutants for a cleaner environment.
• Coating prevents contamination and erosion of the electrode surfaces by combustion residue and particulates in the exhaust gases.
• Determines the oxygen content of the exhaust gas, monitoring the air fuel ratio for combustion efficiency.

CA_Prop65_Nickel:	WARNING: This product can expose you to chemicals, including Nickel and Nickel Alloyed Stainless Steel, which are known to the State of California to cause cancer or birth defects or other reproductive harm. www.p65warnings.ca.gov
Connector Gender:	Female
Connector Shape:	Square
Mounting Type:	Threaded
Overall Length:	390.0
Sensor Type:	Heated
Thread Diameter:	18.0
Thread Size:	M18
Universal Or Specific Fit:	Specific
Wire Gauge Measurement:	20.0
Wire Quantity:	3

• 1985 Chevrolet Caprice | Position: Upstream
• 1985 Chevrolet El Camino | Position: Upstream
• 1985 Chevrolet Monte Carlo | Position: Upstream
• 1991-1993 Geo Tracker | Position: Upstream | Note: B1S1
• 1991 Isuzu Stylus | Position: Upstream | Note: B1S1
• 1994-1995 Geo Tracker | Position: Upstream | Note: Non Calif-ESV;B1S1
• 1994-1995 Isuzu Pickup | Position: Upstream | Note: B1S1
• 1994 Isuzu Rodeo | Position: Upstream | Note: B1S1
• 1994-1995 Suzuki Sidekick | Position: Upstream | Note: Non Calif-ESV;B1S1
• 1985 Chevrolet Impala | Position: Upstream
• 1985 GMC Caballero | Position: Upstream
• 1985 Pontiac Parisienne | Position: Upstream
• 1990-1991 Geo Storm | Position: Upstream | Note: B1S1
• 1990-1992 Isuzu Impulse | Position: Upstream | Note: B1S1
• 1991 Suzuki Sidekick | Position: Upstream | Note: B1S1
• 1992-1993 Suzuki Sidekick | Position: Upstream | Note: Soft Top;B1S1
• 1993-1994 Isuzu Amigo | Position: Upstream | Note: B1S1
• 1993 Isuzu Pickup | Position: Upstream | Note: From 10/92;B1S1
• 1993 Isuzu Rodeo | Position: Upstream | Note: From 11/92;B1S1
• 1994-1995 Honda Passport | Position: Upstream | Note: B1S1
• 1995 Isuzu Rodeo | Position: Upstream | Note: To 3/95;B1S1