Work Procedure
Open hood and remove cover from air cleanerSECTION A
Check Material Of Mass Air Flow Sensor (MAS)
- If MAS is aluminum, NO FURTHER WORK IS NECESSARY; reinstall cover on air cleaner and close hood
- If MAS is plastic, proceed to Section B
SECTION B
Check Screen In MAS
- Switch ignition to "OFF" position
- Loosen clamps -5- on air hose -6- between MAS -4- and intake air duct -10- and remove air hose
- Disconnect electrical connector from MAS
- Disconnect and remove tie wrap -1-from metal bracket -8- Remove 4 bolts -7- securing MAS, then remove MAS
- With MAS removed, check screen installation inside MAS.
- If adhesive is present at the outer edge, (metal frame around screen is covered with adhesive) proceed to Section D
- If no adhesive is present (metal frame around screen is visible), proceed to Section C
- If no screen is present in MAS, find old screen and return to VWoA with old MAS
- Install new MAS (part # 078 133 471 C)
- Proceed to Section D
SECTION C
Retaining Ring Installation
- Install retaining ring -9- ( part # 078 133 553) with stepped side toward screen into MAS -4- by pushing in retaining ring until it is flush with end of MAS
- Proceed to Section D
SECTION D
Re-assembly
- Reinstall MAS using 4 screws -7- and tighten to 10 Mm (7 ft lb.)
NOTE:
MAKE CERTAIN SEAL -3- IS POSITIONED CORRECTLY BEFORE INSTALLING MAS
- Reinstall tie wrap -1- in metal bracket -8- Reconnect electrical connector to MAS
- Reinstall air hose -6- between MAS -4- and intake air duct -10- and tighten clamps
- Reinstall cover on air cleaner