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2022 R1T 12V Battery Dying - DIY Replacement Options?

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Mike T. · rep 0 · May 24, 4:11 PM · 1 replies · solved · Question

Vehicle: 2022 Rivian R1T Launch Edition

My 2022 Rivian R1T has been acting strange lately. Sometimes it won't 'wake up' immediately, and I've even had a few 'Service Vehicle Soon' warnings pop up, though no specific OBD codes I could pull myself. I'm wondering if the 12V battery is dying. Has anyone experienced this with their R1T or R1S? What are the common symptoms you saw?

I'm fairly handy and have replaced 12V batteries in ICE cars before. Is it a straightforward DIY job on the R1T? Are there any specific things to watch out for, like needing to put the vehicle in a service mode or specific tools? Also, what type of battery does it use (AGM, LiFePO4, etc.) and where is it located?

Finally, is this something that would typically be covered under Rivian's warranty, especially for a relatively new 2022 model? I'd prefer to save a service appointment if it's an easy fix, but don't want to void anything.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 24, 4:11 PM

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Hello Sarah, thanks for reaching out. The 12V battery in your Rivian R1T, like in most EVs, is crucial for powering all the low-voltage electronics, including the vehicle's computers, lights, infotainment, and even initiating the high-voltage system. While the main battery powers the drive, the 12V is what 'boots up' the entire system.

Common symptoms of a failing 12V battery in a Rivian include:

  • Delayed vehicle wake-up or no response when attempting to enter.
  • Intermittent accessory function (e.g., HVAC not turning on, windows unresponsive).
  • Various 'Service Vehicle Soon' or '12V System Fault' warnings on the display.
  • Unusual electrical glitches or phantom drains.

DIY 12V Battery Replacement on a Rivian R1T: This is a manageable DIY task if you're comfortable with basic car maintenance, but there are critical steps unique to EVs:

  1. Safety First: Always wear appropriate safety gear, including gloves and eye protection. Ensure the vehicle is off and parked on a level surface.
  2. Access the Battery: The 12V battery in the R1T is located under the frunk (front trunk) floor panel. You will need to remove the frunk liner and potentially some trim pieces to gain full access.
  3. Engage Service Mode: This is crucial. Before disconnecting anything, navigate to the infotainment screen and activate 'Service Mode.' This properly powers down the necessary systems and prevents error codes or potential damage when the battery is disconnected.
  4. Disconnect Terminals: Disconnect the negative (black) terminal first, then the positive (red) terminal. Use a wrench of the appropriate size.
  5. Remove and Replace: Carefully remove the old battery. Rivian vehicles typically use an AGM (Absorbent Glass Mat) 12V battery. Ensure your replacement battery meets or exceeds the original equipment manufacturer (OEM) specifications for size, CCA (Cold Cranking Amps), and type. Secure the new battery in its tray.
  6. Reconnect Terminals: Connect the positive (red) terminal first, then the negative (black) terminal. Ensure all connections are tight and secure.
  7. Exit Service Mode: Exit service mode via the infotainment screen. Allow the vehicle a few minutes to fully reboot and recalibrate its systems.

When to See a Shop:

  • If symptoms persist after replacing the 12V battery.
  • If you are uncomfortable performing the DIY steps or lack the necessary tools.
  • If the vehicle displays specific diagnostic trouble codes (DTCs) that point to issues beyond just the 12V battery, such as problems with the DC-DC converter (which charges the 12V battery from the high-voltage pack).

Warranty Considerations: For a 2022 R1T, a failing 12V battery might be covered under Rivian's basic vehicle warranty, especially if it's determined to be a manufacturing defect rather than normal wear and tear. However, DIY replacement could potentially complicate a warranty claim if not done correctly. It's always best to contact Rivian Service directly to inquire about warranty coverage before proceeding with a DIY replacement, especially for a relatively new vehicle. They can often run remote diagnostics to confirm the 12V battery's health.

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