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Pin

Description

Wire color

Connected to

1

5V reference input voltage

Red/green

pin 50 of the ECU

2

Signal ground

Brown/blue

pin 25 of the ECU

3

12V supply input

Yellow/black

relay 109

4

Not connected

-

-

5

Power ground

Brown

ground

6

Output voltage

Purple/brown

pin 52 of the ECU

The Pierburg MAF, VW number 074 906 461, has 6 pins. The wire colors and the connections mentioned to the ECU are from a 66kW AGR and a 81kW AHF engine.

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