clunk/rattle in rear end over bumps - Mazda3 Forums : The #1 Mazda 3 Forum
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post #1 of 31 (permalink) Old 04-24-2008, 10:18 AM Thread Starter
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clunk/rattle in rear end over bumps

My 2005 with 50k has had this noise for probably 10-20k now.

When going over pot holes or sharp bumps or speed bumps, it makes this loud clunk/rattle like something big is loose in the back end.

I removed all items from the trunk and checked the spare area and everything is tight.

I took it to the dealer and they said everything is tight.

I saw several threads on this but no answers yet.

Anyone find a solution? Anyone having the same issue?

Thanks.
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post #2 of 31 (permalink) Old 04-24-2008, 10:36 AM
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Re: clunk/rattle in rear end over bumps

let me find the threads for you

[img width=495 height=100]http://farm4.static.flickr.com/3555/3478377440_fa711bf3ea.jpg?v=0[/img]
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post #3 of 31 (permalink) Old 04-24-2008, 10:38 AM
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Re: clunk/rattle in rear end over bumps

http://www.mazda3forums.com/index.php?topic=94327.0
http://www.mazda3forums.com/index.php?topic=91682.0
http://www.mazda3forums.com/index.php?topic=75673.0
and the answer is


loose endlink

[img width=495 height=100]http://farm4.static.flickr.com/3555/3478377440_fa711bf3ea.jpg?v=0[/img]
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post #4 of 31 (permalink) Old 04-27-2008, 03:31 PM
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Re: clunk/rattle in rear end over bumps

Is this something that can easily be fixed by tightening up the bolt? Or do parts needs to be replaced?
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post #5 of 31 (permalink) Old 04-27-2008, 03:49 PM
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Re: clunk/rattle in rear end over bumps

if its like my prob. even after the bolts are tight you still get the sound
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post #6 of 31 (permalink) Old 04-29-2008, 05:10 PM
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Re: clunk/rattle in rear end over bumps

I get this same sound at around 40k miles... loose endlink you say?

Many people have gotten similar sounds from blown out shocks as well... either way i'm planning on replacing my whole front and rear suspension

Anyone have a definitive answer on this?

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post #7 of 31 (permalink) Old 04-29-2008, 07:16 PM
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Re: clunk/rattle in rear end over bumps

I have the same problem. Its the endlinks for the swaybar. The nuts keep loosening up for some reason. Super frustrating. I wrench them fucking tight as can be, and the sound disappears. About a week later the sound is back and they are loose again.

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post #8 of 31 (permalink) Old 04-29-2008, 08:19 PM
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Re: clunk/rattle in rear end over bumps

hmm, well i'll check it this weekend and find out if its the same on mine

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post #9 of 31 (permalink) Old 10-17-2011, 04:50 PM
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Re: clunk/rattle in rear end over bumps

One way to fix the bolts from coming loose is to put washers between them and the endlinks. I use to have a gocart with a roll cage and those bolts use to get loose all hte time so i finally put washers inbetween the nut and the cage and it never got loose again. I think this might work the same. I'm gonna try it as i have the noise as well.

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post #10 of 31 (permalink) Old 10-17-2011, 07:02 PM
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Re: clunk/rattle in rear end over bumps

Mine had a really annoying rattle in the back after I installed Koni Yellows (shocks).

I don't own a torque wrench so I can't give you good numbers, but I tightened the ever living crap out of the lower mounting bolts and it fixed it. The shocks were moving and rattling on the bolts on the lower control arms.

-Eric
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