Buy 1990 Audi 90 2.3L 5 cylinder A/T FWD Base Sedan Mass Air Flow Sensor. 100 Series. 5 CYLINDER W/O 20 - OEM Audi Part # 054133471BX (054-133-471-BX, 054133471B)

Mass Air Flow Sensor. Meter.
Mass Air Flow Sensor.

Mass Air Flow Sensor

Fits 100, 5000, 80, 90, Coupe

100 Series. 5 CYLINDER W/O 20 VALVE, from 8AM299827. 80 & 90 Series; 5-Cylinder; Single Cam Engine. Air flow w/o turbo.
Mass Air Flow Sensor - Repair or Replace
If the mass air flow sensor or MAF meter in your 1990 Audi 90 is failing, you’ll notice in addition to the check engine light that your engine may crank and not start, or that the engine speed surges at idle.