Humming/Whining Noise 2006 A6 4.2 Quattro
#21
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Hi guys,
I also have some noise/vibration coming from the rear of the car under heavy acceleration only. It goes away as soon as I lift off and gets gradually less as the speed/load increases.
My shop reckons it's the rear differential. has anyone experience of with this scenario ?
Thanks Paul..
I also have some noise/vibration coming from the rear of the car under heavy acceleration only. It goes away as soon as I lift off and gets gradually less as the speed/load increases.
My shop reckons it's the rear differential. has anyone experience of with this scenario ?
Thanks Paul..
I recently had the same problem. In my case it was the driveshaft center support bearing.
(Link to my earlier thread)
https://www.audiworld.com/forums/a6-...ation-2881869/
Check that out first. I'm sure it would be a lot cheaper to fix than the rear dif!
Good Luck!
#22
I owned an 05 4.2 for 9.5 years and 141k miles. Here is a list by mileage of what happened to mine during the 9.5 years. Please keep in mind that I was compulsive in maintaining the car. However, with that said it is a pretty good indicator of what may happen to the C6 as it ages. Look what happened after 125k miles!
Miles Service
884 Miles Warranty
1) MMI hardware replaced
5,283 Miles Warranty
1) 5,000 mile service
10,152 Miles $126.53
1) Oil Change
14,775 Miles Warranty
1) 15,000 mile service
2) tighten front passenger seat
3) tighten air vent outlets
4) update airbag software
5) tighten dashboard
6) update MMI software
20,059 Miles $112.74
1) Oil Change
2) tighten dashboard
20,685 Miles Warranty
1) Replaced pollen filter door
2) Replace tire pressure sensor
3) Replace Mmi control ****
24,727 Miles Warranty
1) 25,000 mile service
2) tighten dashboard
3) replace windshield wiper blades
28,506 Miles $204.97
1) Brake fluid flush
2) Repair front passenger seat frame
3) Replace license plate light bulb
4) Update MMI software
5) Repair ski sack
6) oil change
28,620 Miles Warranty
1) Replace all 8 coil packs
2) Replace throttle control valve
29,806 Miles Warranty
1) replace fuel door cover
2) update airbag software
32,254 Miles Warranty
1) Replace front brake pads
2) clean HVAC drains
3) replace pollen filter
33,926 Miles Warranty
1) Replace rear brake pads
2) Replace fuel filter
3) Lube steering column
4) Tighten dashboard
5) 35,000 mile service
36,129 Miles Warranty
1) Update fuel gauge software
2) Replaced power steering hose clamp
36,739 Miles Warranty
1) Replace interior light in driver's footwell
37,715 Miles Warranty
1) Update airbag software
40,759 Miles Combination Warranty/$341.74
1) Transmission fluid flush
2) Replace fluids in differentials
3) oil change
44,754 Miles Warranty
1) Replace steering column
2) convert front brake pads
3) 45,000 mile service
49,419 Miles Warranty
1) Replace head cover gasket
2) Oil Change
50,283 Miles Warranty
1) Replaced rear sunshade motor
54,659 Miles combination warranty/$891.32
1) coolant system flush
2) replace coolant temperature sensor
3) replace fog lamp
4) replace trunk latch
5) 55,000 mile service
56,440 Miles combination warranty/$110.29
1) update ECU module
2) replace tire air pressure sensors
3) replace windshield wipers
60,168 Miles combination warranty/$241.49
1) oil change
2) brake fluid flush
3) replace rear seat air bag ignitor
61,040 Miles $1,186.67
1) replace front brake pads and rotors
2) replace rear brake pads and rotors
65,209 Miles combination warranty/$323.54
1) 65,000 mile service
2) replace coolant temperature sensor
3) replace parktronic speaker
65,635 Miles $435.50
1) replace thermostat
66,553 Miles $168.85
1) Replace light bar in front passenger door
66,848 Miles $268.20
1) Replace wood trim on driver's front door
69,020 Miles $123.55
1) Oil change
70,741 Miles $287.34
1) Replace rear right tail light assembly
2) Clear air bag codes
75,099 Miles $761.88
1) 75,000 mile service
75,762 Miles Warranty
1) replace center rear seat air bag sensor
2) replace rear seat bracket
80,187 Miles $1,223.61
1) oil change
2) flush transmission fluid
3) replace brake fluid
85,450 Miles $320.44
1) 85,000 mile service
2) update airbag software
87,879 Miles Warranty
1) replace rear seat air bag sensor connector
2) readapt tilt wheel steering column
90,746 Miles $826.97
1) oil change
2) replace oil pressure sensor
3) re-adapt steering column
4) replace rear brake pads and rotors
93,793 Miles combination warranty/$315.09
1) Replace steering column
2) replace front brake pads
95,964 Miles $720.33
1) 95,000 mile service
2) replace battery
100,600 Miles $1,529.52
1) oil change
2) replace all 8 coil packs
3) replace fuel filter
4) replace brake fluid
5) coolant flush
6) replace supplemental rear passenger air bag
103,924 Miles $1,191.74
1) 105,000 mile service
2) replace passenger tailight assembly
3) replace right side motor mount
110,515 Miles $2,277.12
1) oil change
2) replace all 4 upper and lower control arms and tie rod ends
3) replace both side sway bar links
115,704 Miles $861.73
1) 115,000 mile service
2) 4 wheel alignment
3) replaced left side license plate bulb
4) replaced passenger side running light
120,490 Miles $1,105.50
1) oil change
2) replace transmission fluid
3) replace differential fluids
124,683 Miles $2,303.08
1) 125,000 mile service
2) replaced front brake pads and rotors
3) replaced rear brake pads
4) replaced satellite radio module
5) replaced battery
127,496 Miles $552.87
1) replaced rear passenger window regulator
2) replace passenger sider amber light bulb
133,383 Miles $1,516.17
1) replace jet pump valve
2) replace engine temperature sensor
3) replace both radiator hoses
4) coolant flush
5) brake fluid flush
6) 135,000 mile service
133,600 Miles combination warranty?$502.96
1) replace right side combi valve
2) replace passenger side adaptive headlight assembly
133,714 Miles $225.52
1) fuel injection service
134,585 Miles $1,977.74
1) replace vacuum line under manifold
2) replace temperature sensor
3) replace driver side adaptive headlight assembly
135,880 Miles $493.54
1) replaced thermostat
2) bled coolant system
3) replaced rear passenger side seat latch
137,015 Miles $1,540.46
1) replace drivers air bag
2) replace wiper blades
138,250 Miles $849.93
1) replaced radiator
138,682 Miles $9,116
1) oil change
2) replace torque converter
3) replace timing chains
4) replace timing chain guides
5) replace timing chain tensioners
138,939 Miles Warranty
1) replace intake manifold
2) replace all coil packs
3) replace all fuel injectors
4) replace fuel distributor rail
5) replace front heated oxygen sensor
6) replace combi-valve
__________________
Miles Service
884 Miles Warranty
1) MMI hardware replaced
5,283 Miles Warranty
1) 5,000 mile service
10,152 Miles $126.53
1) Oil Change
14,775 Miles Warranty
1) 15,000 mile service
2) tighten front passenger seat
3) tighten air vent outlets
4) update airbag software
5) tighten dashboard
6) update MMI software
20,059 Miles $112.74
1) Oil Change
2) tighten dashboard
20,685 Miles Warranty
1) Replaced pollen filter door
2) Replace tire pressure sensor
3) Replace Mmi control ****
24,727 Miles Warranty
1) 25,000 mile service
2) tighten dashboard
3) replace windshield wiper blades
28,506 Miles $204.97
1) Brake fluid flush
2) Repair front passenger seat frame
3) Replace license plate light bulb
4) Update MMI software
5) Repair ski sack
6) oil change
28,620 Miles Warranty
1) Replace all 8 coil packs
2) Replace throttle control valve
29,806 Miles Warranty
1) replace fuel door cover
2) update airbag software
32,254 Miles Warranty
1) Replace front brake pads
2) clean HVAC drains
3) replace pollen filter
33,926 Miles Warranty
1) Replace rear brake pads
2) Replace fuel filter
3) Lube steering column
4) Tighten dashboard
5) 35,000 mile service
36,129 Miles Warranty
1) Update fuel gauge software
2) Replaced power steering hose clamp
36,739 Miles Warranty
1) Replace interior light in driver's footwell
37,715 Miles Warranty
1) Update airbag software
40,759 Miles Combination Warranty/$341.74
1) Transmission fluid flush
2) Replace fluids in differentials
3) oil change
44,754 Miles Warranty
1) Replace steering column
2) convert front brake pads
3) 45,000 mile service
49,419 Miles Warranty
1) Replace head cover gasket
2) Oil Change
50,283 Miles Warranty
1) Replaced rear sunshade motor
54,659 Miles combination warranty/$891.32
1) coolant system flush
2) replace coolant temperature sensor
3) replace fog lamp
4) replace trunk latch
5) 55,000 mile service
56,440 Miles combination warranty/$110.29
1) update ECU module
2) replace tire air pressure sensors
3) replace windshield wipers
60,168 Miles combination warranty/$241.49
1) oil change
2) brake fluid flush
3) replace rear seat air bag ignitor
61,040 Miles $1,186.67
1) replace front brake pads and rotors
2) replace rear brake pads and rotors
65,209 Miles combination warranty/$323.54
1) 65,000 mile service
2) replace coolant temperature sensor
3) replace parktronic speaker
65,635 Miles $435.50
1) replace thermostat
66,553 Miles $168.85
1) Replace light bar in front passenger door
66,848 Miles $268.20
1) Replace wood trim on driver's front door
69,020 Miles $123.55
1) Oil change
70,741 Miles $287.34
1) Replace rear right tail light assembly
2) Clear air bag codes
75,099 Miles $761.88
1) 75,000 mile service
75,762 Miles Warranty
1) replace center rear seat air bag sensor
2) replace rear seat bracket
80,187 Miles $1,223.61
1) oil change
2) flush transmission fluid
3) replace brake fluid
85,450 Miles $320.44
1) 85,000 mile service
2) update airbag software
87,879 Miles Warranty
1) replace rear seat air bag sensor connector
2) readapt tilt wheel steering column
90,746 Miles $826.97
1) oil change
2) replace oil pressure sensor
3) re-adapt steering column
4) replace rear brake pads and rotors
93,793 Miles combination warranty/$315.09
1) Replace steering column
2) replace front brake pads
95,964 Miles $720.33
1) 95,000 mile service
2) replace battery
100,600 Miles $1,529.52
1) oil change
2) replace all 8 coil packs
3) replace fuel filter
4) replace brake fluid
5) coolant flush
6) replace supplemental rear passenger air bag
103,924 Miles $1,191.74
1) 105,000 mile service
2) replace passenger tailight assembly
3) replace right side motor mount
110,515 Miles $2,277.12
1) oil change
2) replace all 4 upper and lower control arms and tie rod ends
3) replace both side sway bar links
115,704 Miles $861.73
1) 115,000 mile service
2) 4 wheel alignment
3) replaced left side license plate bulb
4) replaced passenger side running light
120,490 Miles $1,105.50
1) oil change
2) replace transmission fluid
3) replace differential fluids
124,683 Miles $2,303.08
1) 125,000 mile service
2) replaced front brake pads and rotors
3) replaced rear brake pads
4) replaced satellite radio module
5) replaced battery
127,496 Miles $552.87
1) replaced rear passenger window regulator
2) replace passenger sider amber light bulb
133,383 Miles $1,516.17
1) replace jet pump valve
2) replace engine temperature sensor
3) replace both radiator hoses
4) coolant flush
5) brake fluid flush
6) 135,000 mile service
133,600 Miles combination warranty?$502.96
1) replace right side combi valve
2) replace passenger side adaptive headlight assembly
133,714 Miles $225.52
1) fuel injection service
134,585 Miles $1,977.74
1) replace vacuum line under manifold
2) replace temperature sensor
3) replace driver side adaptive headlight assembly
135,880 Miles $493.54
1) replaced thermostat
2) bled coolant system
3) replaced rear passenger side seat latch
137,015 Miles $1,540.46
1) replace drivers air bag
2) replace wiper blades
138,250 Miles $849.93
1) replaced radiator
138,682 Miles $9,116
1) oil change
2) replace torque converter
3) replace timing chains
4) replace timing chain guides
5) replace timing chain tensioners
138,939 Miles Warranty
1) replace intake manifold
2) replace all coil packs
3) replace all fuel injectors
4) replace fuel distributor rail
5) replace front heated oxygen sensor
6) replace combi-valve
__________________
imo that's just bad economics.
no car is loved so much as to put non-recoverable dollars into it like that.
just not a route I would go.
#23
That's one of the differences between an enthusiast original owner and one who isn't. Kevin did a lot for his car and in hindsight it's always easier to judge what was perhaps a better cut-off point. Nevertheless, his sharing of details and knowledge on this forum, based upon all the things that could go wrong have enriched this forum for all of us
#24
That's one of the differences between an enthusiast original owner and one who isn't. Kevin did a lot for his car and in hindsight it's always easier to judge what was perhaps a better cut-off point. Nevertheless, his sharing of details and knowledge on this forum, based upon all the things that could go wrong have enriched this forum for all of us
100% agree with you.
we all have different means and motives.
he too pointed how bills got hefty at 125Kmiles.
I also like tinkering somewhat with my challenging car.
there are issues I can handle, and some waaaaay beyond me.
#25
AudiWorld Super User
That's one of the differences between an enthusiast original owner and one who isn't. Kevin did a lot for his car and in hindsight it's always easier to judge what was perhaps a better cut-off point. Nevertheless, his sharing of details and knowledge on this forum, based upon all the things that could go wrong have enriched this forum for all of us
#26
whirring maybe solved ????
I was having the whirring sound
i was getting concerned it might be diff. bearing
or tranny related.
so I took it to a parking garage and drove around about 30 km/hr (garage was nearly empty)
put all windows down and the whirring was amplified by the garage walls.
faster i went the faster the whirring.
not louder though.
drove with 1 window down at a time now
as I began to suspect it was a wheel bearing.
the key was that the whirring went away as I cornered at speed.
I could hear the whirring most when driver window was open.
like 3x louder than when any other window was open.
and it even sounded like it was coming from driver front tire area.
I suspect that this wheel bearing is going.
i was getting concerned it might be diff. bearing
or tranny related.
so I took it to a parking garage and drove around about 30 km/hr (garage was nearly empty)
put all windows down and the whirring was amplified by the garage walls.
faster i went the faster the whirring.
not louder though.
drove with 1 window down at a time now
as I began to suspect it was a wheel bearing.
the key was that the whirring went away as I cornered at speed.
I could hear the whirring most when driver window was open.
like 3x louder than when any other window was open.
and it even sounded like it was coming from driver front tire area.
I suspect that this wheel bearing is going.
#28
AudiWorld Senior Member
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