I got around 3 - 3 1/2 years from the OEM battery in my TSX and RDX. I almost got 4 years from my OEM battery in my MDX. Went with interstate and I get the full advertised life from these batteries compared to the crappy OEM batteries.I am not a mechanic, but I can say the MDX and RDX batteries may pass the battery test.at the third party testers. Doesn't mean the battery is good...it means it just passed a test. If your battery is 3 years or older, replace it.. It's not worth the inconvenience of frustration. I had the same problem with both...tested good....but questionable. I have learned over the years....be ready to replace a 3 year old battery.