They say to be careful to watch for any way that dirt particles can enter the fresh air stream from the filter, as sand particles particularly can damage the hot film matrix that determines mass air flow. As I said, all mfrs suffer from this, just not a perfect science yet I guess, hard to get them to last 100% of the time.
If you have a good relationship with the dealer, you can ask if they can help pay for this out of warranty, wouldn't hurt to ask.
Gilly
ps you can install it yourself at any rate, easy to replace it.
I like to reset the self-adaptation after replacement, but not crucial that this gets done, it will fall back into range fairly quick.

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