I thought I would cast a wide net for opinions and experiences regarding replacement of the MAF sensor as a PM item after a certain number of miles. In other words, how long is a MAF going to last?

My logic is:
1. All Bosch items will fail when you don't want them to
2. MAF's are Bosch items (and they are subjected to repeated heating and cooling cycles in an unfreindly environment)
ergo, MAF's will fail when you don't want them to.

My (admittedly limited) experience with MAF's >100K miles has shown that they fail between 100K and 130K miles.

So, I'm thinking I ought to just replace the puppy at 100K and be done with it. This way I can buy it on teh cheap and replace on my schedule.

Feel free to opine about O2 sensors as well. It's a big chunk of change, but if they set you up for another 100K of trouble-free driving, maybe it's not such a bad idea. Kind of like the battery - why wait for battery death to start tormenting you with strange gremlins and symptoms in a futile effort to save a dollar or two.

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Prost!