Air Flow Meter/Sensor: Service and Repair

WM 244519 Removing and installing hot-film mass air flow sensor

Technical values





Preliminary work

1. Remove air cleaner housing.
-> 242419 Removing and installing air-cleaner element.
2. Remove top half of air filter.
2.1. Unscrew eight Torx tapping screws (T25 screw insert) on the upper part of the air filter.





Threaded joint on top half of air filter

2.2. Lift off top half of air filter -1-.





Bottom half of air filter with air-cleaner element

Removal

Removing mass air flow sensor

1. Unscrew two Torx tapping screws (T25 screw insert) -2-.





Hot-film MAF sensor fitted

2. Pull out mass air flow sensor -1-.
2.1. Check O-ring -2- and replace it if necessary.
2.2. Grease new O-ring lightly with Kluber Syntheso Glep (Part No. 000.043.204.68).





Hot-film MAF sensor with O-ring

Installation

Installing mass air flow sensor

1. Insert mass air flow sensor -1- with new O-ring into the air cleaner housing.
Always observe installation position. The lug must be facing the housing.





Installation position of hot-film MAF sensor

2. Fit two Torx tapping screws (T25 screw insert) -2- and tighten carefully.





Hot-film MAF sensor fitted

=> Tightening torque: 3 Nm (2 ftlb.)

Subsequent work

1. Fit top half of air filter.
1.1. Screw in eight Torx tapping screws (T25 screw insert) on the upper part of the air filter and tighten carefully.





Threaded joint on top half of air filter

=> Tightening torque: 3 Nm (2 ftlb.)
1.2. Check that the top half is seated correctly.
2. Install air cleaner housing.
-> 242419 Removing and installing air-cleaner element.