Product review (2 stars): Fits Fine, But Incredibly Unreliable
Based on the near instantaneous failure of the 1st of 3 of these I've bought, I have to say they are very likely not original equipment. But they're too inexpensive to return. I purchased again, from a different supplier, when the first one had only lasted for two wash loads. Amazon sources these switches from multiple suppliers who might not even know they're apparently so poorly made. Before installing, I 'exercised' the new switch for two days  (while watching TV) and it continued to work. Since installation, it's still OK after about 10 loads, but you shouldn't have to count each correct operation as some sort of victory.

Bottom line: You'll have to decide on your own comfort level with the apparent price/reliability ratio. At least they're easy to replace.