Is this a Brake Noise? (Thumping in Trunk)
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    Newbie NewsView has not yet proved knowledgeable NewsView's Avatar
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    Question Is this a Brake Noise? (Thumping in Trunk)

    I've got a real head-scratcher here for those of you who'd like to take a stab at it: When idling at a stop light or even after putting my '01 Elantra in Park and pulling up the emergency brake, I sometimes hear a series of noises from the rear of the car. It sounds as if someone is trying to escape from my trunk—ta-dump, ta-thump, da-thunk! On one hand, when I am at a stop light I can make the thumping sound go away by pressing harder on the brake pedal. On the other hand, when I take my foot OFF the brake pedal after pulling into my driveway and putting the car into Park with the e-brake up, I sometimes also hear the noise. When it happens in my driveway, the thumping noises are loud enough to catch the attention of anyone standing nearby. It can go on for up to a minute before it dies out.

    I can't seem to figure out if the noise points to a problem with the rear disc brake pads, calipers, ABS system, rotors, rear struts, brake cylinder(s), emergency brake or even the exhaust muffler. I don't notice any braking problems or suspension issues (although on the front end my car has already had a few odd problems including two new front struts and a new engine mount). Because I can't reproduce the rear thumping noise for my dealer, this has gone on now for four years! If I continue to do nothing—because I can't get anyone at my dealer to troubleshoot a problem they can't reproduce—am I potentially putting myself or other drivers in danger?

    Thanks in advance for your help. Also, has anyone else had this problem?

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  3. #2
    vvrrooom 02xdGLS has not yet proved knowledgeable 02xdGLS's Avatar
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    Default Re: Is this a Brake Noise? (Thumping in Trunk)

    hmmm
    you sure the noise is from the rear of the car??
    not the cat. converter clanking noise??

    other than that i can't seem to think of anything else right now. 10+ hours of work kinda tires you out.

  4. #3
    Senior Member tricked03gls has not yet proved knowledgeable tricked03gls's Avatar
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    Default Re: Is this a Brake Noise? (Thumping in Trunk)

    i got the same noise when i apply my brakes.............from the rear of the car
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    Default Re: Is this a Brake Noise? (Thumping in Trunk)

    Do you happen to have the all-wheel disc brakes, too (non ABS models had rear drums, at least back in '01).

    The cat sounds like a good place to check. I asked my dealer once to check the exhaust, but I have no idea what the dealer mechanic actually did to investigate. It's still an unsolved mystery…

  6. #5
    I've been here forever felixr has not yet proved knowledgeable felixr's Avatar
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    Default Re: Is this a Brake Noise? (Thumping in Trunk)

    sorry to go off topic here but i couldnt resist. . . lolol im cracking up here cause i read your title and(just realized that what im about to say isnt as funny as it is in my head but who cares i already started) instantly though . . . its probably that person you kidnapped. . . see, not as funny . . . its just one of those thoughts thats hillarious only in your head and only to you . . . hehe, oh well sorry bout that

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    perpetual n00b bikerPA has not yet proved knowledgeable bikerPA's Avatar
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    Default Re: Is this a Brake Noise? (Thumping in Trunk)

    man, I was thinking the same thing... "See, if you put a bullet through the guy's head before you locked him in the trunk, he'd stop thumping!"

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    I've been here forever felixr has not yet proved knowledgeable felixr's Avatar
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    Default Re: Is this a Brake Noise? (Thumping in Trunk)

    hahahahahahaaa rofl . . . well ok maybe not really rolling but i laughed outloud at work which is the equivilent of rofl at home . . .

  9. #8
    Acountabilibuddy ricerrx7 knows a lot about Elantras
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    Default Re: Is this a Brake Noise? (Thumping in Trunk)

    Is the car moving at all when this sound occurs? If not then it's not a brake noise. Try to reproduce the sound while you have someone else walk around the vehicle...

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    Large Member kylemorg has not yet proved knowledgeable kylemorg's Avatar
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    Default Re: Is this a Brake Noise? (Thumping in Trunk)

    I wonder if something under the car is loose and banging against the body (no... the body of the car not the one in the trunk). It could be that the muffler hangers are loose or something like that.

    Try ricerrx7's suggestion, except have the other person push down on the rear bumper to bounce the car and see if you can reproduce the sound.

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    Senior Member tricked03gls has not yet proved knowledgeable tricked03gls's Avatar
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    Default Re: Is this a Brake Noise? (Thumping in Trunk)

    i wanna say its a strut mount, but not sure
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    Do you Hyundai? GTsmokeya has not yet proved knowledgeable GTsmokeya's Avatar
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    Default Re: Is this a Brake Noise? (Thumping in Trunk)

    Wow I thought no one else had this problem my old 03 GT use to make a similar noise in the rear ( dealer never heard it though I brought it in 4 times cause yes it is loud) But it only made the noise when I turned the car off or came to a stop more when I turned it off it kinda sounded like a pump noise to me I dont know if that is what is causing your noise just thought I would share.

    GTsmokeya

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    Large Member kylemorg has not yet proved knowledgeable kylemorg's Avatar
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    Lightbulb Re: Is this a Brake Noise? (Thumping in Trunk)

    Quote Originally Posted by GTsmokeya
    ...it kinda sounded like a pump noise to me ..
    Hmmm... is there a pressure booster pump for the fuel lines in that black box under the car on the driver's side rear near the fuel tank? If so, maybe it is that?
    Last edited by kylemorg; 05-19-2005 at 04:55 PM.

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