Air Flow Meter/Sensor: Service and Repair

Mass Airflow Sensor (G70)

• The Intake Air Temperature (IAT) sensor 2 and the Mass Airflow (MAF) sensor are integrated in a single housing.

Special tools, testers and auxiliary items required

• Hose Clip Pliers (VAS 6362)

Removing

- Disconnect the MAF sensor electrical connector - 1 -.






- Disconnect the connecting pipe from the MAF sensor.

- Remove the MAF sensor bolts from the air filter housing and remove the MAF sensor.

Installing

For problem free operation of the MAF sensor it is very important to observe the following notes and procedures.

• If the air filter is very dirty or soaked, dirt particles or moisture may have contaminated the MAF sensor and may be causing false mass airflow values. This results in a reduction of power, since a lower injection quantity is calculated.

• Always use Volkswagen genuine parts air filters, refer to the Parts Catalog.

• Use a lubricant (silicone free) for installing the connecting pipe.

• The hose connections and the hoses must be free of oil and grease before being installed. Use a silicone free lubricant when installing.

• Only use approved clamps for hose connections. Refer to the Parts Catalog.

- Check the MAF sensor and connecting pipe (intake air side) for salt residue, dirt, and leaves.

- Check the intake passages up to the air filter for dirt. If any contaminants are discovered, clean the air filter housing (upper and lower parts) of salt residue, dirt and leaves (if necessary, clean by washing or vacuuming). air filter element removing and installing, refer to => [ Air Filter Element ] Service and Repair.

Further installation is in the reverse sequence to removal.

- Replace the O-ring.

- Tighten the bolts to 3.5 Nm.