Battery OEM Subaru or OEM Mercedes

I only just replaced the Subaru branded battery a couple weeks ago with another Subaru battery. It comes with a 30 month warranty and supposed to have a 55 lifespan.

Yeah they use undersized batteries, but just buy a good one and that's the end of it. my 2019 Legacy had is original battery after 4 years when I traded it in.

Yes. Subaru batteries are hot garbage. Go third party all day. I stand by any AGM I can pick up at Autozone, since they stand behind the batteries they sell.

My dealer replaced the battery, updated the firmware and did a parasitic drain test.

Any tips or advice before I fork out money for a new battery? I have some anxiety hoping its not the alternator dying, or less likely the starter. All things point to a slowly dying battery but I want a second opinion.

I had Subaru batteries last me only 2 years in upstate NY. I kept getting them for free under warranty. I probably got 4 this way. Finally, the dealer said your alternator is bad and that's why they are going bad (completely bogus). I started going to a local mechanics soon after that and they told me that super OEM batteries are complete garbage.

Exactly the same issue I am currently facing with a month old GLC300. No resolution yet

I have a 2019 Subaru outback. The battery dies every two months and I am left stranded.

The OEM battery sucks I upgraded mine to an AGM with an extra 100 or so CCA. A better battery will also let your auto start stop last longer. Stock battery would never last a stop light for while under load new battery gives me a lot more time even under load.

I had the same problem. My car was brand new too but was sitting for a bit before it was sold to me. I brought it in to get charged a few times but the message was still coming up and I was definitely driving it enough. Eventually they just changed the battery under warranty.