Testing My Rivian’s Battery at 35K Miles: Here’s What I Found

JetFalcon · 2025-08-30T08:47:52+00:00

I’m reaching out because my So Flo Customs Rivian (one of only two built) has been out of service for months. The car is fully repaired, but it cannot operate because the service center is refusing to perform a software update required for the airbag that operates the ride height suspension. Despite having a third-party technician with years of experience on-site, the Costa Mesa service center has dismissed their input and continues to block the update. At one point, the lead aggressively approached my technician, their co-workers, and me in an attempt to stop the update. After repeated roadblocks, I felt I had to raise the stakes by asking about escalation to regional managers. The front-line employees’ reactions were striking—they seemed overwhelmed, almost emotional, rather than focusing on innovation or finding a solution. It was clear that the standard processes weren’t allowing them to advocate effectively. I’ve followed all procedures and tried to escalate appropriately, but the update remains stalled. My goal is simply to get the vehicle fully operational while following proper channels. Has anyone successfully navigated flagged vehicles or managed to get similar updates approved? Any advice would be greatly appreciated. Thanks in advance

Rivian Blue

Member

May 5, 2025

Last weekend, I hit 40,000 miles on my Rivian and decided to test how much battery capacity it still has. I drained the battery to 0%, with just 1 mile of range left, then charged it all the way to 100%. I was shocked to see it only lost about 1 kWh since it was new. At 20,000 miles, the vehicle data showed 130 kWh of capacity. Now, it’s at 127.72 kWh.

I won't lie, I was expecting a bigger drop at this mileage, but these results are way better than I hoped. Honestly, it’s impressive how well the battery’s holding up after all those miles. I did the test myself, and it was pretty easy to pull off. Starting with an almost dead battery and charging it fully gave me a solid read on its health.

I’m a bit excited and surprised that it only lost a tiny bit of capacity after 40,000 miles. I was worried I’d see a bigger decline, but this makes me feel good about the Rivian’s battery lasting for the long haul. If you’re wondering about your own Rivian’s battery, you should give this a try. It’s a quick way to check how it’s doing without any fancy tools.

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