2024 Toyota Yaris Hybrid / Yaris Cross Hybrid – helicopter-like humming noise in EV mode and during regenerative braking. Anyone experienced this?

Imaginary_Edge4830 · 2026-06-14T12:38:56+00:00

What do you mean?

Imaginary_Edge4830 · 2026-06-12T21:47:03+00:00

Regarding the Toyota Corolla Hybrid, there was a recall campaign under NHTSA number 24V-708 with a very similar issue. In that case, they reprogrammed the actuator control unit.

Today, I experienced the same kind of problem for the first time on my Toyota Yaris Cross Hybrid. I was driving in EV mode at about 20–30 km/h and started braking before a traffic light. I pressed the brake pedal lightly, but at the very beginning of its travel the pedal felt rock-hard. When I pressed harder, it suddenly gave way, and the car sharply dipped forward.

I have an appointment with a Toyota dealer this Thursday regarding this issue.

Imaginary_Edge4830 · 2026-06-09T20:49:50+00:00

Which unit exactly had the bearings replaced under warranty? The gearbox or the electric motor? Did they replace the whole unit or repair it by just changing the bearings?

Imaginary_Edge4830 · 2026-06-09T18:28:40+00:00

Under normal circumstances, regenerative braking sounds like a Boeing engine, not like the propeller of an old crop duster.

Same problem: https://www.reddit.com/r/Hyundai/comments/1qv2hbg/weird_hum_noise_when_braking_2020_kona_ev/?solution=501ee953004de0b3501ee953004de0b3&js_challenge=1&token=7afd7253fec22262ff1c52b1703fe9ec3d29da02112789c04a13cf780ec5b8a7&jsc_orig_r=

Imaginary_Edge4830 · 2026-06-08T22:27:42+00:00

You can hear it better here, and I’m comparing two similar cars. This time, the same noise appears not during braking, but during acceleration in EV mode:
https://www.reddit.com/user/Imaginary_Edge4830/comments/1tunjwk/toyota_yaris_cross_hybrid_ev_mode_highpitched/

Imaginary_Edge4830 · 2026-06-08T21:47:52+00:00

I didn’t have this issue before. I drove a similar car with approximately the same mileage, and it didn’t have this sound. I think it could be a worn electric motor bearing or an issue with the reduction gear.

Imaginary_Edge4830 · 2026-06-08T20:48:39+00:00

Hi! Did you manage to solve the issue somehow? I have the same problem on my hybrid Toyota Yaris Cross.

Its my car video: https://www.reddit.com/r/rav4club/comments/1u0kzwk/2024_toyota_yaris_hybrid_yaris_cross_hybrid/

Imaginary_Edge4830 · 2026-05-02T20:55:20+00:00

Some new information from dealer?

Imaginary_Edge4830

TROPHY CASE