AA Ignition Mass Air Flow Sensor (MAF) Replacement — 1999–2009 GM Fit, Plug-and-Play Hot-Wire

AA Ignition's Mass Air Flow (MAF) sensor is a direct-fit replacement that measures intake air so your engine control unit can restore proper fuel delivery and drivability.

If your vehicle is showing MAF-related codes, rough idle, hesitation, or decreased fuel efficiency, this replacement sensor is designed to fit many Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac and Saab models from 1999–2009. Engineered as a plug-and-play part, it uses a factory-calibrated hot-wire element to provide accurate airflow readings without modifications. Match the part number on your original sensor to ensure fitment and consult the complete compatibility chart before ordering.

How will this MAF sensor affect drivability?

Replacing a failing MAF typically restores smooth idling and responsive throttle behavior by returning correct air measurement to the engine computer. Symptoms such as stalling, rough idle, and hesitation under load often improve after installation.

• Corrects inaccurate air intake readings to balance fuel delivery
• Reduces or eliminates MAF-related diagnostic trouble codes (P0100–P0103)
• Helps recover fuel economy lost to a faulty sensor
• Improves stability at idle and during acceleration

Which vehicles and part numbers is this compatible with?

This sensor is built as a direct replacement for many GM and related vehicles from model years around 1999–2009. Confirm your vehicle and compare the original part number to ensure the correct match before purchasing.

• Direct-fit for select Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac and Saab models
• Common applications: Buick Rainier, Cadillac CTS, DeVille, Eldorado, Escalade, Escalade ESV, Escalade EXT, Seville
• Cross-references: 25168491, 25318411AA, AF10043, 25318411
• Always verify with your vehicle’s original part number and fitment guide

What should I expect from installation and fitment?

The sensor is designed for straightforward, plug-and-play installation with no cutting or splicing. It aligns with factory connectors and mounting points to make replacement feasible for DIY mechanics and shops alike.

• Direct-fit design mounts into the factory air intake housing
• Standard electrical connector matches OEM pin layout
• No special tools or ECU reprogramming required in most cases
• Follow routine torque specs and check seals for air leaks after install

Does this MAF sensor meet quality expectations?

While not an original equipment manufacturer (OEM) part, this AA Ignition MAF sensor is manufactured to meet or exceed factory performance, featuring a calibrated hot-wire sensing element for reliable readings. The product is backed by a lifetime warranty to protect your purchase.

• Factory-calibrated hot-wire element for accurate airflow measurement
• Engineered to match OEM fit, finish, and electrical characteristics
• Lifetime warranty through AA Ignition for replacement coverage
• Recommended to replace or clean the air filter when servicing the MAF

Who is this for: This MAF replacement is aimed at vehicle owners and mechanics working on compatible GM and related models from the late 1990s through the 2000s who need a reliable, direct-fit sensor to resolve MAF-related drivability issues. It’s suitable for DIY installers who can follow basic mechanical steps, and for repair shops that want a cost-effective, warranty-backed alternative to dealer-priced sensors. Always confirm compatibility by matching the original part number before purchase.