Strange brake noise and the brakes are not stopping properly?

Tiny
JACQUELINEMEERA
  • MEMBER
  • 2023 BMW M5
  • AUTOMATIC
  • 500 MILES
Hello. I am Jacqeline Meera, and I bought the vehicle listed above a week ago. Everything seems to be fine until the 2nd week. The car is making a strange GRRRRRR sound when I brake. I went for a checkup, and it seems that they didn't find anything wrong. Now the GRRRRRR sound is louder, and my car is barely stopping. I had to keep pumping the brake pedal then it eventually stopped. Can you help me please?
Wednesday, December 20th, 2023 AT 4:41 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
Hello Jacqeline,

To me it sounds like the ABS system is kicking in. Can I ask if the ABS light is on at any time? Also, does the noise correspond with a feeling at the brake pedal? You could have a defective ABS wheel speed sensor that is making the ABS kick on. Can you please shoot a quick video with your phone so I can hear the noise? That way I can tell for sure what's going on. You can upload it here with your response.
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Thursday, December 21st, 2023 AT 5:14 PM

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