Product review (5 stars): Exact Replacement and Easy to Install
I have a Whirlpool Duet Steam front loader.  After 8 years of pounding it week in and week out, it came up with error F21.  After a little internet research and a YouTube video explaining what the error was and how to fix it, I decided to give it a shot myself.  The error was actually for a filter that was full, that is part of this unit.  I had no idea it was even there!  Once I opened up the washer and emptied the filter I noticed a leak, so I need to replace the whole pump unit (wish I would've realized that before I cleaned out 8 years worth of filter gunk - yuk!).  There were other cheaper brands, but I wanted to stick with the manufacturer brand and Amazon had the best price and free shipping (though I paid extra for shipping because I wanted the part fast). Appliance part stores - including the manufacturer - were charging around $60 more.  It arrived in a couple days.  Great packaging.  This unit is exactly identical to the one I was replacing.  It was very easy to take out the old unit and put in the new.  The hardest part was loosening the two hose clamps that connect hoses to the pump.  I had one of my sons give me a hand with that, as they were in an awkward area and you have to squeeze the heck out of them to get them loose.  We were back in action!  The best thing?  I saved myself hundreds of dollars by not having to call a repair shop.  I'm very proud of myself!  :)