Knocking sound coming from rear end - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
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Old 08-15-2012, 06:37 PM   #1 (permalink)
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Default Knocking sound coming from rear end

My 2007 Mazda 6 has a knocking sound that comes from the rear end somewhere. It does it mostly when I apply the brakes but has gotten to where it does it sometimes even when the brakes aren't applied. I have been told maybe its the u-joint and also read online where it might be the brake drums are warped. I figured I'd check on a forum concerning my exact car to see if anyone could help with suggestions. Thanks.


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Old 08-16-2012, 08:40 AM   #2 (permalink)
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Unless you've got four wheel drive, it isn't a u-joint. Check your rotors for cracks, this is what I had last week, see my post on inspecting rotors from last week Inspect your rotors, kiddies!!!

Noises that happen when you brake are most likely brake related.

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Old 10-19-2012, 01:10 PM   #3 (permalink)
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I also have a clicking sound from the rear end when my car goes over speed bump. Took it to the dealer for inspection. During test drive they heard it but after lifting the car on hoist found nothing. After that they guessed that may be the rear pads are lose in calipers and make this noise because of a jolt and offered to grease them. I agreed and they charged me $100 for this but clicking noise did not disappear. I demanded the refund and got it. It was 2 years ago. Since then the clicks became louder. Does anybody know what this could be ?
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Old 10-19-2012, 01:22 PM   #4 (permalink)
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Glad to hear they refunded the rape-charge! On a more serious note, how old are your shocks?
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Old 10-19-2012, 01:23 PM   #5 (permalink)
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End links could be toast.

No reason brake pads should click going over a bump. The pads also have springs that keep them separated; dealer should know and notice that immediately.

If it was me, I'd lay on the ground under the car and have someone push on the rear to get it moving and just listen. If you have a set of ramps to back into, even better.
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Old 10-19-2012, 01:31 PM   #6 (permalink)
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ok, thank you, will try to check the links
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Old 10-19-2012, 01:33 PM   #7 (permalink)
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Quote:
Originally Posted by bevobrown View Post
Glad to hear they refunded the rape-charge! On a more serious note, how old are your shocks?
The shocks are as old as the car (2007). It has 73000 km (~ 50000 miles) on it.
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Old 10-25-2012, 08:32 AM   #8 (permalink)
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Quote:
Originally Posted by karlt10 View Post
End links could be toast.

No reason brake pads should click going over a bump. The pads also have springs that keep them separated; dealer should know and notice that immediately.

If it was me, I'd lay on the ground under the car and have someone push on the rear to get it moving and just listen. If you have a set of ramps to back into, even better.
On my MSP, I had a clicking noise coming from the rear of the car. Over time, the noise got louder and louder and went from being a "click" to an ungodly "clunk". Eventually, as I was pulling into a driveway, the rear suspension made the loudest sound the car's ever made; it sounded like a gunshot. After that, the rear was whisper quiet. Turns out the endlink had been going bad for some time and had finally given up the ghost in spectacular fashion.

Long story short, yeah, check your endlinks.
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Old 06-25-2014, 09:07 AM   #9 (permalink)
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Same horrid "clunking" or banging noise, like a cannon ball was rolling around in the trunk, especially slow speed turning into/out of parking lot etc. It was the left rear stabilizer endlink that was loose/worn. Had it replaced and all is well.

2004 Mazda 6, 80,000 miles
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