higherbro Oxygen O2 Sensor Kit for 2005–2011 GM 2.2L/2.4L — 2PCS Upstream & Downstream, OEM Fit and 1-Year Guarantee

higherbro 2PCS oxygen (O2) sensor kit provides one upstream and one downstream sensor engineered to restore accurate exhaust oxygen readings for compatible 2005–2011 GM 2.2L and 2.4L engines.

These two replacement sensors are made to match the original equipment fit and function for a range of Chevrolet, Pontiac and Saturn models. Replacing a failing O2 sensor can help your engine control module get correct air/fuel data, which supports smoother idling and more consistent performance. The set includes both the upstream (pre-catalyst) and downstream (post-catalyst) units so you can address both elements of the exhaust monitoring system at once.

Which vehicles and engines will these sensors fit?

This pair is compatible with many GM compact models that shipped with 2.2L or 2.4L four-cylinder engines between 2005 and 2011. Verify year, make, model and engine before purchase using the vehicle selector to ensure fitment. The listing covers Chevrolet Cobalt, Chevrolet HHR, Pontiac G5 and certain Saturn Ion and Vue models across specified years.

• Chevrolet Cobalt 2005–2010: 2.2L; 2006–2008: 2.4L
• Chevrolet HHR 2006–2011: 2.2L; 2009–2011: 2.4L
• Pontiac G5 2007–2009: 2.2L; 2007–2008: 2.4L
• Saturn Ion 2005–2007: 2.2L; 2006–2007: 2.4L; Saturn Vue 2006–2007: 2.2L; 2007: 2.4L

How do upstream and downstream O2 sensors differ and why are both included?

The upstream sensor sits before the catalytic converter and measures exhaust oxygen to help control fuel trim. The downstream sensor sits after the catalytic converter and monitors converter efficiency. Supplying both sensors in one kit lets you replace both monitoring points so the engine control system receives accurate, synchronized data.

• Upstream (pre-cat) adjusts the air/fuel mixture in real time.
• Downstream (post-cat) verifies catalytic converter performance.
• Replacing both prevents mismatched sensor response times and error codes.

What are the product features and quality assurances?

higherbro supplies these sensors with a one-year quality guarantee, and the units are built to match the original connector, thread size and sensing tip location for straightforward installation. Before buying, use the vehicle selection tool to confirm year, make, model and engine—especially the engine code and any model notes. The set includes two sensors: one upstream and one downstream.

• Includes two sensors: upstream + downstream for complete replacement.
• Designed to match OEM fitment details (connector, thread, harness length).
• One-year quality guarantee from higherbro.
• Pre-purchase vehicle compatibility check recommended.

Can I install these sensors myself and how long will it take?

Many DIY mechanics with a basic tool set can install O2 sensors in under an hour per sensor, although access and rusted threads can extend that time. Use anti-seize on the threads if not pre-applied and ensure the electrical connectors seat securely. If unfamiliar with exhaust components or error code clearing, a professional installation is recommended.

• Typical DIY install: 30–90 minutes per sensor, depending on access.
• Use proper O2 sensor socket and anti-seize where applicable.
• Clear diagnostic codes after replacement to confirm resolution.

Who this product is for: This higherbro 2PCS O2 sensor set is intended for owners and technicians working on 2005–2011 GM compact cars and crossovers equipped with 2.2L or 2.4L engines who need both upstream and downstream sensors. It suits drivers troubleshooting oxygen sensor fault codes, replacing worn sensors after long service, or preparing a vehicle for emissions inspection. Always confirm compatibility with your vehicle’s VIN/engine details before purchase to ensure proper fit.