Oxygen Sensors for Saturn Vue (2008-2009) 2.4L Upstream & Downstream

Direct-Fit Oxygen Sensor Kit for 2008-2009 Saturn Vue

What it Does: The Oxygen Sensor Kit replaces degraded upstream and downstream lambda sensors on the 2008-2009 Vue to restore factory closed-loop air-fuel ratio feedback and eliminate emissions trouble codes.

The Stock Saturn Vue Sensor Degradation

Over extended heat cycles, factory zirconia oxygen sensors on the GM Theta platform suffer from severe contamination. Exposure to exhaust carbon, blow-by oil vapors, and thermal fatigue degrades the porous platinum electrode. In the 2.4L engine, this causes sluggish switching response (cross-counts) between rich and lean conditions. A slow upstream sensor causes the powertrain control module (PCM) to miscalculate short-term fuel trim (STFT), driving rough idle, poor fuel economy, and fouled plugs, while a tired downstream sensor triggers false catalyst efficiency DTCs like P0420.

The Engineering Solution

This 2-piece upstream and downstream sensor set restores precise Closed-Loop feedback to the factory engine management system. Each sensor features a fast-acting ceramic heater core that brings the zirconia element to operating temperature in seconds, drastically cutting cold-start open-loop emissions. Built with a 304 stainless steel body, dual-layer protective external shield, and high-temp PTFE lead wire insulation, these units resist thermal shock and silicon fouling. Factory-pinned connectors plug directly into the OEM harness with zero wire splicing or repinning required.

Technical Specifications

Compatibility

• 2008 Saturn Vue XE (2.4L L4 LE5)
• 2008 Saturn Vue Green Line / Hybrid (2.4L L4 LAT)
• 2009 Saturn Vue XE (2.4L L4 LE5)
• 2009 Saturn Vue Hybrid (2.4L L4 LAT)

Frequently Asked Questions

Does this fit the GM Theta Vue?
Yes, this is a direct fit for the 2008-2009 Saturn Vue equipped with the 2.4L LE5 Ecotec engine.

Do I need to clear PCM trouble codes after installing these sensors?
Yes, use an OBD-II scanner to clear active and pending DTCs so the PCM can immediately relearn baseline fuel trims.

The Saturn Reliability Standard

Maintain consistent stoichiometric balance and pass state emissions tests without electrical compromises. Designed for long-term resistance against thermal stress and vibration in daily driving conditions.