Spectra MA249 Mass Air Flow Sensor

Spectra MA249 Mass Air Flow Sensor

The Spectra MA249 mass air flow sensor is a direct-fit emission control sensor for select Porsche applications. It is built for stable signal output in demanding under-hood conditions, with a programmable ceramic circuit board and silicon coating to help resist heat swings and road vibration.

• Mass air flow sensor for emission control system service
• Programmable ceramic circuit board for consistent signal response
• Silicon-coated electronics for protection against temperature fluctuation and vibration
• Uses platinum resistance thermometer sensor technology
• OE-style replacement for Porsche 911 and Porsche Boxster applications

Fitment

• Fits 1999-2005 Porsche 911, N/A; Sensor Module w/Housing; Services OE # 99660612400
• Fits 1997-2004 Porsche Boxster, N/A; Sensor Module w/Housing; with Electronic Accelerator

This part cross-references Bosch 0280218009 for the same application. The Spectra MA249 is also referenced by OE and aftermarket numbers including 221352 and 2451234 for select Porsche air metering service needs.

What It Helps Address

• Rough idle caused by inaccurate airflow measurement
• Hesitation or poor throttle response from unstable sensor output
• Check engine light concerns related to air metering faults
• Driveability issues tied to heat- or vibration-related sensor degradation
• Fuel trim problems from incorrect incoming air data

Installation Notes

Verify the OE number and connector style before installation. This MA249 application is listed as a sensor module with housing for the Porsche 911 and Porsche Boxster, and the Boxster listing notes an electronic accelerator configuration. Confirm the vehicle year and application details against the fitment data before service.

Quality Assurance

Spectra designs this mass air flow sensor with a ceramic circuit board, premium silicon coating, and platinum resistance thermometer sensor elements to support stable operation in harsh engine-bay conditions.