UNITHUB MAF Mass Air Flow Sensor 2451103 / 12576410 for Chevy, Buick, GMC — Plug-and-Play Replacement, OE Fit

UNITHUB MAF Mass Air Flow Sensor (2451103 / 12576410) measures incoming air to help your engine manage fuel and combustion timing accurately.

This replacement mass air flow (MAF) sensor is designed for a wide range of General Motors vehicles from mid-2000s through 2015, including Chevrolet, Buick, GMC, Cadillac, Hummer, Pontiac, Saab and Saturn models. Built to match OE mounting and electrical interfaces, the unit transmits airflow data to the engine control module (ECM) so the system can adjust fuel delivery and ignition timing. The part offers simple plug-and-play installation for most compatible vehicles and comes as a single sensor in the package.

How will this MAF sensor affect drivability?

Replacing a failing or contaminated MAF sensor restores accurate airflow readings, which helps the ECM maintain the correct air–fuel ratio. That can reduce rough idling, hesitation, and stalling caused by incorrect sensor input. It won’t fix unrelated mechanical issues but addresses symptoms tied to faulty airflow measurement.

• Restores correct air measurement to the ECM for smoother idle
• Improves throttle response by providing timely, accurate data
• Reduces engine hesitation linked to faulty sensor signals

Is this part compatible with my vehicle and how do I confirm fitment?

This UNITHUB MAF lists broad compatibility across many GM platforms; compatibility varies by engine and model year. Always verify by checking your vehicle’s OEM part number, using the Compatibility Garage tool, or comparing connector style and mounting points before ordering.

• Interchange numbers include 2451103 and 12576410 among others for cross-reference
• Compatible models: Chevy Colorado, Equinox, Impala, Malibu; Buick Rainier, Regal; GMC Canyon, Envoy; plus Cadillac, Hummer, Pontiac, Saab, Saturn
• Confirm fit via OEM numbers, connector pin count, and physical mounting before installation

What should I expect during installation and setup?

Installation is intended to be straightforward: unplug the sensor harness, remove mounting fasteners, swap the sensor, and reconnect. No extra programming is typically required for many GM models, though clearing engine codes or performing a short drive cycle may help the ECM re-learn baseline values.

• Simple swap-in design for most compatible vehicles—no special tools usually required
• Inspect intake tubing and air filter for contamination before installing
• Clear any related diagnostic codes after installation for optimal ECM relearn

What performance characteristics and durability can I expect?

The sensor offers sensitive detection and fast response designed to produce stable transmission of airflow data to the ECM. It’s manufactured to meet typical replacement-life expectations; longevity depends on driving conditions and maintenance of the intake system.

• Engineered for quick response and accurate airflow readings
• Built to OE-style electrical and mounting specifications for a reliable fit
• Maintain air filter and intake cleanliness to maximize service life

Who this is for: technicians, DIY enthusiasts, and owners of compatible GM vehicles who need a direct-fit replacement MAF sensor to restore proper engine management. Choose this UNITHUB sensor when you need an economical, OE-style airflow sensor that matches common GM interchange numbers. Remember to verify compatiblity with your vehicle’s OEM part number and inspect intake components during replacement to ensure lasting performance.