Faint buzzing noise coming from the rear.
01-15-2014, 03:37 PM
#1
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Faint buzzing noise coming from the rear.
A few months back I noticed a faint buzzing sound whilst sitting in the back. Now that I know the sound I can always hear it whilst in the drivers seat.
I notice the buzzing sound starts at around 30mph-60mph. 60mph is when it's easiest to hear.
The pitch of the buzz increases with speed.
The buzz sound doesn't change when the road surface changes. It's a very consistent sound.
It has more of an electronic sound than mechanical.
The sound doesn't occur when stationary and idling.
I have tried deflating the tyres to half PSI but the sound did not go away when travelling at speeds above.
What are your thoughts?
I notice the buzzing sound starts at around 30mph-60mph. 60mph is when it's easiest to hear.
The pitch of the buzz increases with speed.
The buzz sound doesn't change when the road surface changes. It's a very consistent sound.
It has more of an electronic sound than mechanical.
The sound doesn't occur when stationary and idling.
I have tried deflating the tyres to half PSI but the sound did not go away when travelling at speeds above.
What are your thoughts?
01-15-2014, 04:08 PM
#2
AudiWorld Super User
A few months back I noticed a faint buzzing sound whilst sitting in the back. Now that I know the sound I can always hear it whilst in the drivers seat.
I notice the buzzing sound starts at around 30mph-60mph. 60mph is when it's easiest to hear.
The pitch of the buzz increases with speed.
The buzz sound doesn't change when the road surface changes. It's a very consistent sound.
It has more of an electronic sound than mechanical.
The sound doesn't occur when stationary and idling.
I have tried deflating the tyres to half PSI but the sound did not go away when travelling at speeds above.
What are your thoughts?
I notice the buzzing sound starts at around 30mph-60mph. 60mph is when it's easiest to hear.
The pitch of the buzz increases with speed.
The buzz sound doesn't change when the road surface changes. It's a very consistent sound.
It has more of an electronic sound than mechanical.
The sound doesn't occur when stationary and idling.
I have tried deflating the tyres to half PSI but the sound did not go away when travelling at speeds above.
What are your thoughts?
You may need to ride in the trunk while someone drives the car to determine which side it is on.
I posted a thread on this a year and a half ago or so.
01-16-2014, 10:55 AM
#3
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If not that and it is more of an electronic buzz the stereo might not be properly grounded and that's why it increases with speed. Generally if this is the case all speakers would buzz not just one.
01-17-2014, 08:19 AM
#7
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The buzz is more like a WHUUUUUURRRRRRR and not like an EEEEEEEEEEEEEEE
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01-17-2014, 09:23 AM
#9
Great advice mishar, this should help rule out the drive train as the culprit. Wheel bearing is the first thing I thought of but the "whurrrrr" description does imply electronic, the radio ground option is quite possible as well. Is it possible there is a leak in the suspension air system and the pump is coming on to keep the the car up? I am mainly asking mishar, you are quite the expert on these things.
01-17-2014, 09:37 AM
#10
AudiWorld Super User
I should be. At least my Automotive Engineering Masters Diploma says that. Unfortunately online fixing Audi's is just like appendix surgery over the radio. 