2023 R1T Brake Fluid Flush Interval & Type?

ClearTheCode admin answer:

Maintaining your brake fluid is crucial for your 2023 Rivian R1T, even with regenerative braking. Brake fluid is hygroscopic, meaning it absorbs moisture over time, which can lower its boiling point and lead to a spongy pedal or reduced braking efficiency.

Here's what you need to know:

1. Recommended Interval: Rivian typically recommends a brake fluid flush every 2 years or 20,000 miles, whichever comes first. Always refer to your owner's manual for the most precise schedule, as this can sometimes vary slightly.
2. Brake Fluid Type: Your Rivian R1T uses DOT 4 brake fluid. It's essential to use the correct type to ensure proper system function and prevent damage to seals and components. Never mix different types of brake fluid.
3. DIY vs. Professional: While a brake fluid flush can be a DIY task on some vehicles, it's generally recommended to have it performed by a certified Rivian service center or a qualified professional. The R1T's braking system, especially with its advanced ABS and regenerative braking integration, can be complex. Improper bleeding can introduce air into the system, leading to dangerous braking performance issues. Specialized tools and knowledge might be required to properly cycle the ABS pump during the flush process.

Causes of Degradation:

• Moisture Absorption: The primary cause. Water in the fluid can boil under heavy braking, creating vapor pockets that compress, leading to a soft or non-existent pedal.
• Contamination: Over time, tiny particles from wear and tear can contaminate the fluid, affecting its performance.

When to See a Shop:

• If you notice a spongy or soft brake pedal.
• If your brake warning light illuminates (though this is less common for just old fluid, usually indicating a fluid level or pressure issue).
• If you're approaching the recommended service interval and don't have the specialized tools or experience for a proper flush. There are typically no OBD codes associated with old brake fluid itself, but system faults caused by low fluid or air could trigger codes like C0040 (Brake Fluid Level Sensor Circuit Malfunction) or C0050 (Brake Fluid Pressure Sensor Circuit Malfunction).