AULINK Oxygen Sensor for 2.4L GM Engines — Direct-Fit Upstream/Downstream, Stainless Steel

AULINK Oxygen Sensor 234-4242 / 234-4251 is a direct-fit upstream and downstream replacement oxygen sensor designed for 2.4L GM engines, restoring accurate air-fuel readings for compatible Chevrolet, GMC, Pontiac and Saturn models.

This AULINK sensor is built to match OEM fit and function for many GM 2.4L vehicles from the late 2000s to mid-2010s. It uses a stainless-steel housing and double laser-welded construction to resist corrosion and maintain a robust seal, while the protective design helps keep moisture and contaminants out of the sensing element. The result is a sensor intended to deliver stable oxygen measurements to the engine control module so the fuel trim and emissions systems can operate as designed.

Which vehicles and part numbers does this sensor replace?

The AULINK oxygen sensor fits a wide range of GM models with 2.4L L4 engines. It is a compatible replacement for several OEM part numbers, so you can match it to the original sensor removed from the vehicle.

• Direct OEM cross-references: 234-4242, 234-4530, 250-24704, 15128, 15151, 15697 and others.
• Vehicle fitment includes Chevy Malibu (2008–2010), Equinox (2010–2014), Captiva Sport (2012–2014).
• Also fits GMC Terrain (2010–2014), Pontiac Solstice (2008–2009), G6 (2008–2010).
• Compatible with Saturn Aura (2007–2009), Vue (2008–2010), Sky (2008–2010); all L4 2.4L engines.

How does the construction improve longevity and reliability?

The sensor uses a double laser-welded stainless-steel body and a tightly sealed assembly to reduce moisture intrusion and corrosion. Those design choices extend service life compared with lower-quality units and help maintain consistent readings over time.

• Double laser-welds for a fully submersible, robust seal.
• Stainless-steel housing resists rust and road salt corrosion.
• Protective inlet design allows airflow but blocks water and debris.
• Built for stable performance across thermal cycles and driving conditions.

What performance and benefits should I expect after installation?

Replacing a failing oxygen sensor with this AULINK unit restores accurate exhaust oxygen measurements, which helps the ECU maintain proper fuel mixture and may improve drivability and emissions system function. While results depend on overall vehicle condition, a correct sensor reduces false oxygen readings that can trigger check-engine codes.

• Helps the engine control module correct air-fuel ratios more accurately.
• Can reduce drivability issues tied to lean/rich sensor faults and related codes.
• Supports emissions control components by providing reliable signals.
• Direct-fit design simplifies replacement—no modification required in most cases.

What warranty and quality assurances come with this part?

AULINK backs this oxygen sensor with a limited warranty to give buyers confidence in its expected life and workmanship. The warranty and quality features reflect the manufacturer’s aim to meet or closely match OEM durability standards.

• 1-year warranty or 50,000 km coverage, whichever applies.
• Manufactured to replace multiple OEM reference numbers for correct fit.
• Built components focus on corrosion resistance and sealed construction.

Who is this for: This AULINK 234-4242 / 234-4251 oxygen sensor is intended for owners and technicians working on GM 2.4L L4 vehicles—Chevrolet, GMC, Pontiac and Saturn models from roughly 2007–2014—who need a reliable, direct-fit upstream or downstream replacement. Choose this unit if you require correct OEM cross-reference compatibility, corrosion-resistant construction, and a backed warranty for routine oxygen sensor replacement or troubleshooting emissions and fuel-trim related codes.