BDFHYK Mass Air Flow Sensor MAF 213-3428 AFH50M-05 for 3.8L GM (1999-2005) — Direct Fit, OE Replace

The BDFHYK Mass Air Flow Sensor (MAF) 213-3428 / AFH50M-05 precisely measures incoming air to help restore correct air-fuel balance for compatible 3.8L GM engines.

If your 3.8L Buick, Oldsmobile, Pontiac, or Camaro from the 1999–2005 model years shows a rough idle, reduced fuel economy, or a check engine light that points to airflow readings, the MAF sensor is a common culprit. This aftermarket BDFHYK unit replaces part numbers 213-3428 and 19112543 and is engineered to match electrical and physical fitment for Lesabre, Impala, Bonneville, and Camaro applications listed. Installing a correct-functioning MAF helps the engine control unit get accurate air-mass data so fuel delivery and ignition timing can adjust appropriately under load or idle conditions.

How will replacing the MAF sensor affect drivability?

Swapping a faulty MAF for this BDFHYK sensor usually stabilizes idle and responsiveness by restoring accurate air measurement to the engine computer. Expect smoother acceleration and more consistent throttle response once the engine control module receives correct readings.

• Reduces sputter and hesitation during acceleration.
• Helps eliminate unstable or fluctuating idle RPMs.
• Enables proper fuel trims for better performance under load.

Will this sensor fit my vehicle and how does it connect?

This MAF is designed for GM 3.8L V6 engines listed (Buick Lesabre 1999–2005, Impala 2000–2005, Bonneville 1999–2005, Camaro 1999–2002) and follows the same mounting footprint and connector pinout as OE references 213-3428 and 19112543. Installation is typically a direct plug-and-play or requires minimal fastening and hose clamp work.

• Compatible with the specified model years and 3.8L engine family.
• Standard electrical connector matches factory harness for these applications.
• Mounts to the intake tube with OEM-style flange and fasteners.

What symptoms indicate the MAF sensor needs replacement?

Common signs that the MAF is failing include an illuminated check engine light with relevant fault codes, rough idling, engine hesitation, or loss of fuel efficiency. While some symptoms overlap other components, diagnosing code readings and checking airflow sensor output narrows the cause.

• Diagnostic trouble codes (e.g., P0100–P0104 family) related to airflow.
• Noticeable drop in gas mileage or black smoke from the exhaust.
• Intermittent stalling, surging, or erratic idle behavior.

How do I maintain or test this MAF after installation?

Basic care includes keeping the intake tract and air filter clean to prevent contamination and checking the electrical connector for corrosion or loose pins. If symptoms recur, use a scan tool to monitor MAF voltage/frequency and perform live-data checks to confirm correct sensor output across idle and throttle transitions.

• Inspect and replace air filter regularly to reduce sensor fouling.
• Clean mating surfaces and confirm secure connector seating during installation.
• Use live-data diagnostics to verify expected airflow readings under load.

Who is this for: The BDFHYK MAF sensor is intended for DIY mechanics, independent shops, and owners of 3.8L GM vehicles from the late 1990s to mid-2000s seeking a cost-effective OE-compatible replacement. Choose this part if you need a direct-fit aftermarket option to correct air-mass readings and restore stable engine operation without extensive modification. Always match your vehicle’s VIN, engine code, and part number references before purchase to ensure fitment, and consult repair manuals or a technician if you’re unsure about installation or diagnostics.