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R1T Battery Coolant Level Low Warning - DIY Check & Refill?

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Mike T. · rep 0 · May 25, 5:11 AM · 1 replies · solved · Question

Vehicle: 2023 Rivian R1T Adventure

Hey everyone, I just got a 'Low Battery Coolant' warning pop up on the dash of my 2023 Rivian R1T Adventure trim. It's got about 15,000 miles on it.

I'm usually pretty handy with car maintenance, but this is my first EV. Is checking and topping off the battery coolant something I can do myself, or is it a service center job? If DIY, what type of coolant does the R1T use, and where exactly is the reservoir located? I want to make sure I'm not doing more harm than good.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 5:11 AM

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ClearTheCode admin answer:

Addressing a 'Low Battery Coolant' warning on your 2023 Rivian R1T is important, as the battery thermal management system is critical for performance and longevity. While some basic checks can be performed, topping off coolant is often best left to a Rivian service center due to the specialized nature of EV thermal systems.

1. Initial Check (Caution Advised):

  • Location: The battery coolant reservoir is typically located under the frunk (front trunk) area, often beneath a plastic cover. Consult your owner's manual for the exact location and access procedure specific to your R1T model year.
  • Visual Inspection: Check the reservoir's external markings for minimum and maximum levels. If it's visibly below the minimum, there's a definite issue.

2. Causes of Low Coolant:

  • Normal Evaporation: Over time, some minor coolant loss can occur, though it's less common in sealed EV systems.
  • Small Leak: A more serious concern is a leak within the closed cooling system. This could be from a hose, fitting, or component within the battery pack or cooling lines.
  • Air in System: If the system was recently serviced, trapped air could cause a temporary drop in level after initial circulation.

3. When to See a Shop:

  • Persistent Warning: If the warning light persists after a visual check, or if the level is significantly low, it's crucial to schedule service with Rivian immediately. Do not ignore this warning.
  • Unknown Coolant Type: Rivian vehicles use a very specific coolant formulation designed for their high-voltage systems. Using the wrong type of coolant can cause severe damage to seals, corrosion, and compromise the thermal performance, potentially voiding your warranty. Never mix coolants or use a generic automotive coolant.
  • No Visible Leak: If you can't identify an obvious external leak, the issue might be internal, requiring specialized diagnostic tools and expertise.
  • DIY Risk: Attempting to top off without the correct coolant and proper bleeding procedures can introduce air into the system, leading to inefficient cooling and potential overheating of battery components. Rivian's cooling system is complex and requires specific procedures for maintenance.

It's highly recommended to contact Rivian Service for diagnosis and proper replenishment of the battery coolant to ensure the integrity and safety of your vehicle's thermal management system.

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