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2023 Rivian R1T Front Motor Whine/Hum at Low Speeds

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Kim L. · rep 0 · May 22, 7:11 AM · 1 replies · solved · Question

Vehicle: 2023 Rivian R1T Quad-Motor

Hey everyone,

I've recently started noticing a distinct whining or humming sound coming from the front motor area of my 2023 Rivian R1T Quad-Motor. It's most prominent at low speeds, roughly between 0-30 mph, especially when I'm gently accelerating or decelerating.

It's not super loud, but it's definitely a new sound that wasn't there before. I've got about 15,000 miles on it. Is this a normal characteristic for the R1T's electric motors, or could it be an early sign of a problem? I'm a bit concerned about the drivetrain.

Has anyone else experienced this with their R1T, particularly the 2023 model year? Any insights or advice would be greatly appreciated before I decide to schedule a service appointment.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 7:11 AM

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ClearTheCode admin answer:

It's understandable to be concerned about new sounds from your vehicle, especially with an advanced electric drivetrain like the Rivian R1T. Here's a breakdown of potential causes and what to do:

  1. Normal EV Motor Characteristics: Electric motors, by their nature, can produce a high-pitched whine or hum, especially under load or during regenerative braking. This sound can vary with speed, motor RPM, and power demand. Sometimes, these sounds become more noticeable as components settle in or due to slight changes in ambient temperature or road conditions. However, if it's a new sound for your specific vehicle, it warrants attention.

  2. Potential Causes for New/Increased Whine:

    • Motor Bearing Wear: Over time, the bearings within the electric motor can wear, leading to increased noise. This is a common source of whining or grinding sounds in rotating machinery.
    • Reduction Gear Whine: EVs use a single-speed reduction gear to transmit power from the motor to the wheels. Issues with these gears (e.g., wear, lubrication, or manufacturing tolerances) can manifest as a whine.
    • Inverter Noise: The inverter, which converts DC battery power to AC for the motors, can also produce high-frequency sounds, though these are typically less mechanical and more electronic in nature.
    • Loose Components: Less likely, but sometimes a loose shield or component near the drivetrain could vibrate and create a similar sound.

  3. What You Can Do (Self-Checks):

    • Note Conditions: Pay close attention to when the sound occurs. Is it only during acceleration, deceleration, or both? Does it change with temperature? Is it louder when turning?
    • Listen for Changes: Does the pitch or volume of the whine change significantly with speed or power input? Does it disappear at higher speeds?
    • Check for Warning Lights: Always keep an eye on your dashboard for any drivetrain-related warning lights or messages. While motor noise might not immediately trigger a code, a developing issue could.

  4. When to See a Shop:

    • If the sound is new and persistent: Since you've identified it as a new sound, it's best to have it professionally inspected.
    • If the sound is getting louder or changing in character: Any progression in the noise suggests a potential issue that needs addressing.
    • If accompanied by vibrations or performance changes: If you feel any unusual vibrations through the steering wheel or floor, or notice any change in power delivery, schedule service immediately.

We recommend contacting a Rivian Service Center. They have specialized diagnostic tools and expertise to accurately pinpoint the source of the noise. Early diagnosis can prevent more significant issues down the line.

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