The first step is to locate the MAF sensor. Its position is on the air intake system, after the air filter box.

The second step is to unplug the connector on the MAF sensor. It has a clip that holds it firmly in place, so you need to push the clip with your finger to release it. (red arrow) Then just pull the plug off.
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The first step is to locate the MAF sensor. Its position is on the air intake system, after the air filter box.
The second step is to unplug the connector on the MAF sensor. It has a clip that holds it firmly in place, so you need to push the clip with your finger to release it. (red arrow) Then just pull the plug off.
The third step is to unscrew the two torx security screws. To do that, you will need a trox screwdriver T20. After the screws are out, gently pull the sensor out of his casing.
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Getting Started
a) Make sure vehicle is parked on a level surface.
b) Set parking brake.
c) Jack the front of the vehicle and support with properly rated jack stands.
d) Lift the plastic battery cover and disconnect both battery terminals. Remove the short positive lead from the positive battery terminal. (Fig. 1)
e) If engine has run within the past two hours let it cool down.
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AWE Tuning 2000 Audi S4. RS4 K04 Fueling Kit Update 2.0. Update 2.0 for your AWE Tuning RSK04 fueling kit applies to 2000 S4s.
Remove the decorative cover on top of the airbox to expose
the Mass Air Flow sensor (MAF).
This service can be performed with the sensor housing in place on the car. Take care not to drop any items into the housing opening when swapping sensors.
Figure 1
Step 3:
Unclip the sensor harness plug from the sensor, and pull back the rubber boot.
Note the wire colors:
Pin 1: no wire
Pin 2: Green/yellow stripe
Pin 3: Black/green stripe
Pin 4: Purple/gray stripe
Pin 5: Green
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