Hi,
I wander if you can help me. I have a dilemma with AFM meter in my Patrol.
What could be reason for repetitive AFM meter failure?

Facts:
Patrol 3l diesel 2004 model GU (not a newer mk2) 3.0-litre ZD30TD
everything under bonnet factory, no modifications, std air filter
since 2009 four AFM meteres failed, always buy genuine Nissan
no off road driving, clean city use
dirty AFM meter reason eliminated, it fails electronically, suddenly AFM just stops working not gradually (dramatic loss of acceleration or power on up hill).
Last AFM fitted week ago failed after six days (previous lasted up to two years)

I have done plenty of speculations but has any one had the same repetitive failure problem?
Importantly has any one find out what was the underlying problem?
Victor