My cardone replacement died after 3 years. I purchased it from amazon.I went to oreilly and purchased another one as they offer a lifetime warranty for the same part. Considering my experience and that of others I would really recommend getting a warranty. You will need it!The unit from there appeared to be a brand new aftermarket replacement, perhaps it is the "cardone select" version. I hope it lasts as this is an annoying and expensive issue.