Rear Oxygen Sensor for 2001-2005 Honda Civic & More - Walker 250-24121

Walker Products 250-24121 rear oxygen sensor for the 2001-2005 Honda Civic 4-cylinder 1.7L and other vehicles measures the oxygen content of the exhaust gas. Each sensor number is made for one application and fitment position, so it returns the diagnostic feedback the ECU expects.

• Determines the oxygen content of the exhaust gas to monitor the air fuel ratio for combustion efficiency
• Monitors exhaust gases to help reduce pollutants
• Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates
• Measures oxygen levels to help fine-tune the air-fuel mixture for fuel economy
• Electrodes made of a gas-permeable platinum layer

Quick facts

• Part: Walker Products 250-24121 oxygen sensor
• Fits: 2001-2005 Honda Civic 4-cylinder 1.7L and other vehicles
• Position: Upstream, downstream, downstream rear
• Condition: New

A failing sensor can show up as the engine running poorly, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light. The sensor's wiring harness and connector can be behind the same signs, so look them over for physical damage before replacing the sensor. Newer vehicles also store related fault codes in the ECU.

Fits

The 2001-2005 Honda Civic 4-cylinder 1.7L, the 1996-1997 Honda Odyssey 4-cylinder 2.2L and the 1998 Odyssey 4-cylinder 2.3L, and the 2000-2003 Honda S2000 4-cylinder 2.0L and the 2004-2005 S2000 4-cylinder 2.2L are among the vehicles this direct-fit oxygen sensor suits, and quantity is one per vehicle. That includes an O2 sensor for the 2004 Honda Civic 4-cylinder 1.7L. Open the Buyer's Guide tab to check your exact model and engine.

Specifications