Product review (3 stars): Doesn't fit FDB520RHS2 
Customer service was satisfactory. The part came much faster than expected.

My complaint was not against the seller of the pump...This was supposed to fit my frigidaire dish washer.
Pump didn't fit. I had to cut a piece off the dishwasher and grind it flat to accommodate this pump.
After I modified dishwasher, pump fit and is working fine.
Doesn't fit model FDB520RHS2 unless you want to modify your dishwasher.
To modify this dishwasher wasn't hard but its not for all cut plastic tip off and sand or gring surface flat. You can do it just be prepared to do a lil extra modification. The modification doesn't affect seal so causing a leak is not an issue.

In case you were wondering, they offer 30 day warranty from date of order.

For $10 more I should have  got it at sears with 1 year warranty .