I replaced mine after two years given all the reports of battery failures. I have a 2018 M3P with 67,000 miles (it had 50,000 miles at replacement), and although the battery seemed fine, I didn't want to get stuck somewhere with a dead battery. I went with the Ohmmu lithium battery and in spite of all the reports of it causing the car to start throwing error messages, I haven't had any issues at all with mine. It's been absolutely trouble free. I have other uses for the OEM battery, and to date it seems fine (I keep it on a battery tender). I just know from experience that battery failures tend to happen at the worst possible time, and wanted to avoid that. So yes, I took the "proactive" route. No regrets.