Rebuilt 348 MAF Sensors cheap or bad idea

need a MAF ... prices range from 650 to 350 for new...the 350 is not in stock and for crazy reasons I can't wait the 10 days for delivery.

came across a CA company onthe web that will rebuild them for 180. with one day turn around.. they say the sensor is very simple and basic and that they fix it to OEM factory spec and that it is guaranteed for 12 months....I am skeptical but if there is a problem it IS one of the easiest parts to replace but if it does fail the car runs so bad it is unuseable...I wonder if it can be rebuilt and if so, and they are doing this, can the home mechanic rebuild it, hey if birdman can make a fuse panel, I guess these guys just put in a new circuit board or probably something even easier since he did tell me they are very very simple sensors and it only takes them a short while to repair them to the factory spec....ps I also learned that Bosch provides radside service for one year for failure of their starters and alternators....

 

They are Directauto.com...I have never used them before, this is an act of desperation, but I will share my experience when all this in done...these guys rebuild almost everything electrical on the Ferrari , well, it seems all expensive Bosch electrical parts and provide a year guarantee....worth looking into as the cars get older, you need more parts, the parts get scarcer and more expensive and more car owners are going after fewer parts and the cars value continues to slip making the high cost of the parts less and less economical....this way we can keep costs down, and support a guy who is trying to increase the supply of parts with rebuilds. I wanted the new pat and 350 was a good deal but I couldn't wait the 10-14 days for delivery and 650 was kinda much. It seems the part is just a sensor wire and some really basic electronics ...all from Bosch. They say they have been doing this will all the Bosch stuff for many cars for years...with electronics, it either works or it doesn't...no moving parts here so I think if a rebuild tests OK on teh bench, it should be ok in my car for a while..not much will change, other then some heat, to the environment, but the sensor sits up where it is ventelated and is ez to replace if it fails w/in the year

 

I was thinking of switching from stock Air filter to K&N, but was cautioned that the oil can mist and get in the airflow and then clog and fail the thin little wire int eh Mass Air Flow Sensor, being these things are in the range of 100's of dollars it seems the K&N doesn't save much money and the few paltry HP xtra you get, won't be noticed or worth it...any thoughts or experience or is this an old wives tale?