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 or downstream O2 sensor designed to restore accurate air-fuel readings for 2.4L GM engines from 2007–2014.

When an oxygen sensor ages or fails it can cause rough idling, reduced fuel economy, or a Check Engine light. This AULINK replacement matches common OEM part numbers and directly fits a wide range of Chevrolet, GMC, Pontiac, and Saturn models with the 2.4L engine, offering a corrosion-resistant stainless steel body, a water-protected sensing element, and a warranty to back performance.

How will this oxygen sensor affect my vehicle's drivability?

Replacing a worn O2 sensor with a correct-fit unit helps the engine control module (ECM) read exhaust oxygen accurately, which enables better fuel trim decisions. That can improve idle stability and throttle response and reduce the chance of catalytic converter damage from incorrect fuel mixtures.

• Restores accurate air/fuel feedback to the ECM.
• Helps reduce rough idle and hesitation.
• Supports proper catalytic converter operation.

Which vehicles and part numbers does this AULINK sensor replace?

This sensor is compatible with many GM models using the 2.4L L4 engine and covers multiple OEM references to ensure correct replacement. Fitments include upstream and downstream locations for the listed model years.

• Chevrolet: Malibu (2008–2010), Equinox (2010–2014), Captiva Sport (2012–2014).
• GMC Terrain (2010–2014); Pontiac Solstice (2008–2009), G6 (2008–2010).
• Saturn Aura (2007–2009), Vue (2008–2010), Sky (2008–2010).
• OEM references: 234-4242, 234-4530, 250-24704, 12606671, ES20383, OS5516, and more.

What are the construction and durability features of this replacement sensor?

AULINK builds this oxygen sensor with a double laser-welded stainless steel housing for a robust, sealed assembly that resists corrosion and immersion-related damage. The design includes a water-protective inlet to prevent filter clogging and extend service life under demanding conditions.

• Double laser-welded stainless steel housing for corrosion resistance.
• Water-protected oxygen inlet to prevent contamination and clogging.
• Service life backed by a 1-year or 50,000 km warranty.

Is installation straightforward and what should I know before buying?

Installation is typically direct-fit: the sensor uses the same mounting and electrical connection as the original on compatible GM 2.4L models. Basic hand tools and an oxygen-sensor socket are usually sufficient, though anti-seize and torque specs should follow the vehicle manufacturer’s instructions.

• Direct replacement for upstream or downstream positions on listed models.
• Requires correct sensor socket and proper torque; anti-seize as recommended.
• Confirm part number match and vehicle year/engine before purchase.

Who is this for: This AULINK oxygen sensor is for DIY mechanics and professional technicians who need an affordable, OEM-referenced replacement for 2.4L GM engines—owners of Chevy Equinox, GMC Terrain, Malibu, Pontiac G6/Solstice, or Saturn Aura/Vue/Sky seeking a corrosion-resistant, direct-fit upstream or downstream O2 sensor with a 1-year/50,000 km warranty. Verify your vehicle year, engine size, and existing sensor location before ordering to ensure fitment.