[Ferdinanmagelen]

Getting a weird noise coming from the front of my car under medium to hard braking at just about any speed. It sounds kind of like a thumping, like something is bouncing. The rotors and pads are brand new less than a week old. Lifted the car and looked under and around suspension nothing “feels” loose or broken. Everything was fine until the noise appeared a few days later driving into work. Fist post so don’t know how to upload video so I attached a link to my YouTube clip of it.

Car is a 2019 BMW M240xi

[M3SQRD]

Is there any vibration in the steering wheel while you’re braking? Rotors with a solid face or grooved, cross drilled and/or dimpled faces? When did you first notice this (e.g., after brake work, after high mileage on brakes, randomly started out if the blue, etc.)?

If this is due to braking then the number of possibilities is small but if it’s due to some other cause then the number of possibilities is large.

[Ferdinanmagelen]

No vibration in the steering wheel.
Solid face rotors, noticed it 4 days after replacing them on my drive to work.

[Ferdinanmagelen]

Bump

[HP Autosport]

Hard to diagnose by sound only.

This is common with some slotted rotors, but if they have solid faces, it may be a hard spot on the rotor face(inconsistent casting). Try another rotor.