The Rexton Insite+ CIC pair I bought from Costco I ordered from Costco on 1/03/2011 had 3 year warranty, and were dispensed on 1/19/2011. Both of them went bad on 1/16/2015, 4 years later, passing the 3 year warranty by the mfg already. Luckily I paid using the Costco AmEx, and the Costco hearing specialist told me that AmEx usually offers an extra year of warranty after the original mfg warranty expires. So I checked with AmEx and they agreed to pay for the repair, which was $270 for both aids (service diagnosis was receiver clogged, had to be replaced, for both aids). It was very lucky that they went bad very shortly before the end of the extra year of warranty by AmEx. I brought them in to Costco to have them sent in for repair on 1/16/2015. I thought it was already past the AmEx extra year of warranty, but fortunately, what counted was the dispensing date of 1/19/2011, not the day I paid for them of 1/03/2011. So going by the dispensing date of 1/19/2011, I turned them in for repair barely 3 days before the AmEx warranty expired.
So my data point to be shared is 4 years of service for my hearing aids. And the receiver didn't actually go bad, the service note said that they were clogged. But they were replaced anyway, not just unclogged.
The other thing I shared that hopefully will help somebody in the future is that even if you're out of mfg warranty, check with your credit card to see if they provide extra benefit of an extra year of warranty or not. Lucky for me I used AmEx and they offered this benefit. And also lucky for me that the Costco specialist deals with this issue often enough to know about this (I certainly wasn't aware of it). And finally luck for me is that my aids went bad just in time barely a few days before the AmEx warranty expired.
HA wearer since the 1990's > Rexton Insite+ CIC (2011-2016) > Oticon OPN RITE (2016)
KHz 0.25...0.5...0.75...1.0...1.5...2.0...3.0...4.0... 6.0...8.0
Left ...10...10....10.....30.....70....75....80....95.. ..90....80
Right .25...30....40.....55.....75....85....90....90...1 00...100