Mass Air Flow Sensor

Compatible with BMW 3 (E90) , BMW Z4 Roadster (E85) , BMW 3 Touring (E91) Show more info
Measures the amount of air entering the engine, crucial for optimal fuel mixture and performance.
46.81 EUR
inc. VAT 21%
In stock 1
Delivery 1 day (14.05.2026)
PN 503 992
Make TOPRAN

This Mass Air Flow (MAF) sensor from TOPRAN is designed to accurately measure the volume and density of air entering the engine. By providing this critical data to the engine control unit (ECU), it ensures the correct amount of fuel is injected for efficient combustion. A malfunctioning MAF sensor can lead to various drivability issues, including poor acceleration, rough idling, increased fuel consumption, and illuminated check engine lights. Replacing a faulty sensor with this high-quality part can restore engine performance and fuel economy. TOPRAN parts are manufactured to meet stringent quality standards, ensuring reliable performance and durability. This sensor is a direct fit for your vehicle, simplifying the installation process.

  • Accurately measures airflow into the engine
  • Essential for optimal fuel-air mixture
  • Helps maintain engine performance and fuel efficiency
  • Direct replacement for original equipment
  • Ensures proper engine operation and reduces emissions
  • High-quality construction for durability
  • Restores lost power and smooth idling
Housing type
with housing
Housing material
GFK (Glass Fiber Reinforced Plastic)
Number of pin contacts
5
Plug connector housing shape
D-Shape
Housing diameter [mm]
+70
Sensor type
NTC sensor
recommended repair extension
Air filter
  • BMW
    • 3 (E90)
      • 320 i (110kW/150PS)
      • 318 i (95kW/129PS)
      • 320 si (127kW/173PS)
    • Z4 Roadster (E85)
      • 2.0 i (110kW/150PS)
    • 3 Touring (E91)
      • 320 i (110kW/150PS)
      • 318 i (95kW/129PS)
    • X3 (E83)
      • 2.0 i (110kW/150PS)
    • 1 (E87)
      • 118 i (95kW/129PS)
      • 120 i (110kW/150PS)
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