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Knocking sound when braking

Hi guys.

I’ve been to mechanic to get this knocking sound looked at. It’s a fast knocking sound, and gets faster as I come to a stop. It sound like it’s coming from the front left of car.

It only occurs after / when I’ve done a long-ish journey (45+ min). It only happens when I ever so slightly touch the brakes to come to a gradual stop (20mph-0mph).

The mechanic has had a look at it and cannot see anything wrong with my brakes.

I personally think it has something to do with the fact it only occurs when my car has warmed up & this could be why he mechanic can’t see anything: as they only look at the car once it’s been stood in their yard once they’ve got round to looking at it. But I could be easily, completely wrong.

Does anyone have any idea of what it could be?

Comments

  • foxy-stoat
    foxy-stoat Posts: 6,879 Forumite
    Eighth Anniversary 1,000 Posts Name Dropper
    It’s a fast knocking sound, and gets faster as I come to a stop. It sound like it’s coming from the front left of car.

    100% no idea - if it got slower as you come to a stop then pads/calipers.

    Nothing I can think of that would get faster as you slow down.....does it knock when say your in neutral and you brake, ie engine just ticking over?
  • Robisere
    Robisere Posts: 3,237 Forumite
    Ninth Anniversary 1,000 Posts Photogenic Combo Breaker
    What car? Make/model/year?

    If it's front wheel drive, could be drive shafts universal joints, but that's just a guess, could be almost anything.
    I think this job really needs
    a much bigger hammer.
  • DoaM
    DoaM Posts: 11,863 Forumite
    10,000 Posts Fifth Anniversary Name Dropper Photogenic
    Is the brake pedal vibrating? (Could be faulty ABS).
  • Arsenal2019
    Arsenal2019 Posts: 551 Forumite
    Eighth Anniversary 100 Posts Name Dropper
    Thanks for reply guys.
    Citroen C2, 05, front wheel drive.
    Yes, it knocks even when driving I’m neutral .

    It is so strange !!
  • sevenhills
    sevenhills Posts: 5,938 Forumite
    Part of the Furniture 1,000 Posts Name Dropper
    I’ve been to mechanic to get this knocking sound looked at. It’s a fast knocking sound, and gets faster as I come to a stop. It sound like it’s coming from the front left of car.


    It will not be your brakes it the sound is getting faster whilst the car is slowing down. Take the car out and listen some more, maybe take someone with you, for another opinion.
  • DoaM
    DoaM Posts: 11,863 Forumite
    10,000 Posts Fifth Anniversary Name Dropper Photogenic
    sevenhills wrote: »
    It will not be your brakes it the sound is getting faster whilst the car is slowing down.
    Unless it's a faulty ABS. ;)
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