Squealing Brakes on My 2024 R1T - Low Miles!

ClearTheCode admin answer:

Squealing brakes on a new vehicle, even an EV like the Rivian, can be frustrating. While it's not always a sign of a serious problem, it's worth understanding the common causes:

1. Brake Pad Bedding-In:
   • New brake pads and rotors need a 'bedding-in' period to transfer a thin, even layer of friction material from the pads to the rotors. This process optimizes braking performance and can help reduce noise. If this wasn't done properly, or if the pads haven't fully seated, squealing can occur.
   • Action: Perform a proper bedding-in procedure. This typically involves several moderate-to-firm stops from highway speeds (e.g., 60 MPH down to 10 MPH) without coming to a complete stop, allowing the brakes to cool slightly between runs. Consult your owner's manual for Rivian-specific recommendations.
2. Dust and Debris:
   • Brake dust, dirt, or small stones can get trapped between the pad and rotor, causing squealing. Since Rivians rely heavily on regenerative braking, the friction brakes might not be used as frequently, allowing dust to accumulate.
   • Action: A good wash, especially rinsing the wheels and brake calipers, might help. Sometimes a few firm stops can also dislodge debris.
3. Moisture:
   • After rain, washing, or high humidity, a thin layer of rust can form on the rotors, causing a temporary squeal until it's worn off by braking.
   • Action: This is usually temporary and resolves after the first few stops.
4. Pad Material:
   • Some performance-oriented brake pads (which Rivian might use for their weight and power) can be inherently noisier than standard pads, especially when cold or at low speeds. This is a characteristic of the material.
5. Anti-Squeal Shims/Lubrication:
   • Missing or improperly installed anti-squeal shims, or lack of proper lubrication on caliper contact points, can lead to vibrations that cause squealing.

When to see a shop:

• If the squealing is accompanied by a grinding sound, which indicates metal-on-metal contact and severe wear.
• If you feel a pulsation or vibration through the brake pedal.
• If the braking performance feels diminished.
• If the squealing persists after attempting the bedding-in procedure and ensuring the brakes are clean.
• If you notice any dashboard warning lights related to the braking system.

While there are no specific OBD codes for brake squeal, a technician can perform a visual inspection of the pads and rotors, check for proper caliper function, and ensure all anti-squeal components are correctly in place. It's best to address it if it's persistent and bothersome.