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.

After you have done the above, you will have this on your table.
The next step is the cleaning. For that you will need a 3 or 4 cotton sticks and some alcohol.
*Use clear alcohol or start spray – do not use any spray or liquid that is oily or greasy.
Get the cotton sticks mentioned above and flatten them. So they look like this.
*If you don’t do that, they will not fit in the openings.

The places that you need to clean are marked whit red arrows. Easier, you need to clean the 2 metal plates and the *resistor.
*not sure it’s a resistor, butclean it any way.

Download pdf Fiat Bravo/a & Marea - Cleaning the MAF sensor (Diesel engines only)