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View Full Version : Looking to Buy A6 4.2 Any Advice



71airgrabber
10-19-2014, 01:31 AM
I am looking to buy a 4.2 A6. Originally was looking at 2008-2010 but don't think I can swing that so I have lowered my years ( 05-07) but looking for a lower mileage stock car that has been well cared for. Any advice on what to look for? At what mileage does the car need any major service work ?I used to have an 04 A6 2.7 S Line until a storm and oak tree took it out , looking to get back into an A6. Thanks for any and all help.

Kevin1
10-19-2014, 02:51 AM
I recently sold my beloved 05 A6 4.2 after 9 years of ownership and 142k miles. Here is my service and repair history. You will see at what miles my 4.2 had its issues. The 4.2 is a great highway car.

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 knob

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

b8audis4
10-19-2014, 05:39 AM
Carbon buildup.

Kevin1
10-19-2014, 07:24 AM
Carbon buildup.

Not on the 05 and 06. The 4.2 did not go FSI until 07, so the carbon problem did not start on the 4.2 until then.

FormulaElement
10-19-2014, 09:03 AM
I suggest getting a 07 4.2. It will have carbon buildup problems but you can either pay for it to be cleaned, clean it yourself, or install a catch can. Any of these options is much cheaper than paying for the timing chain guides and tensioners to be replaced on the non FSI.

Kevin1
10-19-2014, 01:09 PM
The tensioners are ticking time bombs in these cars. I am not sure if Audi ever changed the design or if it is just that the younger cars have not hit the age or mileage of the older cars yet.

M Walt
10-19-2014, 07:05 PM
If you go with a 4.2 you will want to run Aces4 fuel treatment, you will get better fuel economy it will increase your octane and most importantly you won't have a carbon issue. Go to this website www.bndautomotive.com check the site and talk to Brian and come to your own conclusion., but I use all of his fluids in all my cars (gear oil, trans fluid, gas treatment and coolant) Good luck, you will enjoy the car.

71airgrabber
10-25-2014, 06:37 AM
I wasn't aware of a carbon buildup issue. I will have to do some research on this. All great advice thanks. Should the cam tensioners be done as a preventive measure ? Anyway to check how they are holding up ? Thx again

71airgrabber
10-26-2014, 11:44 AM
What causes the carbon build up ? At what mileage does it start to affect the motor ?

M Walt
10-26-2014, 12:46 PM
Basically direct injection of the fuel into the combustion chamber, not into the intake port (FSI Fuel Straight Injection), suffer from the problem of the formation of carbon deposits on components. Carbon deposits form on the valves eventually robbing power and throwing cels. The dealership will try and perform a cleaning at times with a BG or similar fuel additive. This is why I mentioned prior, I Always run Aces4 in my fuel and have never had any more issues, I also don't worry about what fuel I pump because the additive will compensate for a less than perfect fuel. It lubricates the upper chamber (great for minimizing wear) and doesn't allow the carbon to "stick" and build up. Additional benefits are increase in power and MPG plus I never run 93 octane. I run in my Audi, Volvo, Lexus & Porsche plus other cars I have had with great results. I won't put fuel in the cars without.


Sent from my iPad using Tapatalk

71airgrabber
10-27-2014, 10:28 AM
Thanks for the explanation.

Polar Express
12-11-2014, 01:39 PM
The tensioners are ticking time bombs in these cars. I am not sure if Audi ever changed the design or if it is just that the younger cars have not hit the age or mileage of the older cars yet.

My 05 3.2 needed the chain and tensioners at 58K miles. When I hear folks talk about how 'advanced' Audi is, I think it's a total load of crap. If you cant make something last, it doesn't matter at all how 'advanced' your design is; it is a FLAWED product. (yes, I'm a bit upset)

PE

FormulaElement
12-12-2014, 06:44 AM
My 05 3.2 needed the chain and tensioners at 58K miles. When I hear folks talk about how 'advanced' Audi is, I think it's a total load of crap. If you cant make something last, it doesn't matter at all how 'advanced' your design is; it is a FLAWED product. (yes, I'm a bit upset)

PE

Thats strange, they usually don't go out until 150k+ on the 3.2. Unfortunately timing chain tensioners and guides are usually the first thing to out in many engines (Not Audi specific).

Were you really hard on your car/not get the oil changed often?

Every consumer product has some lemons, its life.

Kevin1
12-12-2014, 03:50 PM
Thats strange, they usually don't go out until 150k+ on the 3.2. Unfortunately timing chain tensioners and guides are usually the first thing to out in many engines (Not Audi specific).
.

It seems to be a age issue rather than a mileage issue. It is becoming quite prevalent in the 05 cars.

FormulaElement
12-13-2014, 11:58 AM
It seems to be a age issue rather than a mileage issue. It is becoming quite prevalent in the 05 cars.

That would make sense. At least their easy to change on the 3.2.

gawga_boy
12-15-2014, 05:58 AM
Basically direct injection of the fuel into the combustion chamber, not into the intake port (FSI Fuel Straight Injection), suffer from the problem of the formation of carbon deposits on components. Carbon deposits form on the valves eventually robbing power and throwing cels. The dealership will try and perform a cleaning at times with a BG or similar fuel additive.

Fuel additives in the FSI engines will not clean the oil vapor deposits on the intake valves since there is no fuel/air mixture to keep them clean. Was discussing having the valves cleaned on my 07 A6 4.2 with my tech who's been an Audi tech for 30 years. He's seen some of the later FSI engines with an extra fuel injector in the intake manifold that is to help keep the intake valves clean.

At any rate, I LOVE the A6 4.2. Quiet and smooth with power in reserve and I LOVE how it comes alive when you put your foot in it with all those V8 sounds and sensations that press all the right buttons for a gear head.