Product review (5 stars): BEFORE YOU PURCHASE:  You might not need after all
After my Maytag MVW C6ESWW1 started to fill the washer to the top on every load, I knew it was the water sensor.  After looking up the part and reading the other reviews, I did what the other folks did and simply took apart the washer and blew directly into the sensor where the hose was attached.  I looked at the contacts and everything looked good so I put everything back to see what would happen.  Low and behold, the water level now fills to the appropriate level!  I am not sure how long this fix will last, but its been about a month so far with no more problems.  So, instead of blowing the money, first take off the hose, blow into the sensor and check everything out.  Reattached and do a test run with a low level load to see how much it fills.  If everything looks good.  Congrats on saving money!

10/25/2012 UPDATE -  The fix is still working as of today !

05/01/2015 UPDATE - My washer started agitating before the water filled up.  I bought a new timer assuming that was the problem, but after researching again it came down to the water sensor.  In fact another review had the same issue with the washer agitating before being full.  Well, low and behold, I again take off the hose, blow into the sensor and hose and re-attached just like I did years ago, and POW!  its a working washer again.  This means the "fix" lasts for about a little over 2 years!  Not bad.