Rear Oxygen Sensor for 1997-2003 Chevrolet Malibu & More - Delphi ES20003

Delphi ES20003 rear oxygen sensor for the 1997-1999 Chevrolet Malibu 4-cylinder 2.4L, the 1997-2003 Malibu V6 3.1L and other vehicles reads the oxygen level in the exhaust so the engine computer can adjust the air-fuel ratio. This Delphi oxygen sensor is tested and calibrated to OE standards for accurate readings.

• Delphi planar technology covers older, conical design sensors
• Smart design consolidates SKUs without using long wires
• Patented protective sensor coating helps prevent contamination
• Validated for all fuel types, including ethanol blends like E85
• Tested to 150,000 miles, plus 2,000 hours of severe thermal testing

Quick facts

• Part: Delphi ES20003 oxygen sensor
• Fits: 1997-1999 Chevrolet Malibu 4-cylinder 2.4L, the 1997-2003 Malibu V6 3.1L and other vehicles
• Position: Rear

A failing oxygen sensor can show up as a check engine light, poorer fuel economy or a rough idle, though a different fault could produce any of these. Before replacing it, look over the sensor's wiring and connector with the engine off and cool for damage or a loose fit; a shop can run the tests that need the engine running.

Fits

This rear oxygen sensor is also a direct-fit replacement for the 1999-2001 Oldsmobile Alero 4-cylinder 2.4L, the 1999-2004 Alero V6 3.4L, the 1999-2001 Pontiac Grand Am 4-cylinder 2.4L and the 1999-2004 Grand Am V6 3.4L. Driving something else? Look up your own year, make and model in the "Vehicles it fits" section. This listing is one sensor: the cars named above take one rear sensor apiece, and some of the other vehicles take two.

Specifications

In the box

One oxygen sensor and one instruction sheet.