Maxfavor O2 Oxygen Sensor Set for 2009–2011 Chevy Traverse GMC Acadia Buick Enclave Saturn Outlook — 2pc Upstream & Downstream, Di

Maxfavor 2-piece upstream and downstream oxygen sensor set engineered to replace factory O2 sensors on select 2009–2011 GM 3.6L V6 SUVs, restoring accurate exhaust monitoring and helping maintain engine performance.

This dual-pack includes one upstream (pre-catalyst) and one downstream (post-catalyst) sensor designed to match original equipment fit and function for Chevy Traverse, GMC Acadia, Buick Enclave and Saturn Outlook models equipped with the 3.6L V6. Each sensor is supplied with the correct connector and thread size so you can swap the faulty unit for a direct replacement without modifying wiring or exhaust components. The set is mapped to common OE reference numbers so it's easy to confirm compatibility before purchase.

Which vehicles and years does this Maxfavor O2 sensor set fit?

These sensors are specified for GM crossover SUVs with the 3.6L V6 from model years 2009 through 2011. Fitment covers both front-wheel-drive and all-wheel-drive versions where the factory sensors use the same mounting and connectors.

• Chevrolet Traverse 2009–2011 (3.6L V6, FWD & AWD)
• GMC Acadia 2009–2011 (3.6L V6, FWD & AWD)
• Buick Enclave 2009–2011 (3.6L V6, FWD & AWD)
• Saturn Outlook 2009–2010 (3.6L V6, FWD & AWD)

How do I confirm these sensors match my original equipment?

Compare part shapes, connector type and OE reference numbers against your current sensor before ordering. The package references many common OE and aftermarket part numbers so you can cross-check quickly.

• Matches OE references such as 234-4815, 234-4816 and several equivalent numbers.
• Visual match: thread pitch, hex size and connector style should align with your existing sensor.
• If unsure, compare photos or contact seller with your VIN for verification.

What is involved in replacing the oxygen sensors?

Installation is straightforward for anyone comfortable with basic automotive work and common hand tools. Typical steps include removing the old sensor with an oxygen-sensor socket, cleaning the threads, fitting the new sensor, and reconnecting the wiring harness.

• Remove old sensor with appropriate socket and compare parts for fit.
• Clean the threaded boss to ensure a proper seal before installing the new unit.
• Tighten carefully to avoid damaging the sensor or wiring; reconnect the harness and clear any diagnostic codes.

How should I handle fitment doubts or returns?

If the sensor set does not fit your vehicle, the seller accepts returns when items are returned in clean, resalable condition. For pre-sale questions, reach out with vehicle details so the correct parts are confirmed before purchase.

• Contact support with vehicle year, make, model and VIN if available.
• Compare the new sensor to your old unit visually before installing.
• Returns accepted if the part is unused and packaged properly.

Who is this for: This Maxfavor oxygen sensor pair is aimed at DIY mechanics and independent shops servicing 2009–2011 GM 3.6L crossover SUVs who need a cost-effective replacement for failing upstream and downstream O2 sensors. It's suited for owners resolving engine light codes, restoring fuel trim accuracy, or replacing worn exhaust-sensing hardware with parts designed to align with common OE references.