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Audi A6 Maintenance and Repair



  • lcavadalcavada Posts: 2
    In my 2005 A6 Quattro, AIR BAG light turned on about 10 days ago. Immediately brought car back to dealer. They kept it for 4 days. Drove away from dealer LESS than 1 mile, and light turned on again.
    Brought it back to the dealer. Now they identified rear right seat belt is defective. They informed me I had to leave car at dealer since it was a safety issue. I refused and had to sign a release in order to leave in my car.

    They ordered a new seatbelt, several days later with no seatbelt yet.
  • lcavadalcavada Posts: 2
    My 2005 A6 Quattro recently failed to start. At the dealer they upgraded the firmware for the entire system in order to fix the issue.

    Since then....

    My BT voice quality is very poor. Prior to that, I tried many different BT phones and they all worked flawlessly. All of them did not exhibit full seettings (antenna strength, phonebook, etc.) but did have really good voice quality over the BT link. These phones have always paired with the MMI system without any issues.

    Since the update the call quality is so poor, I quite often turn of the phone's BT because I cannot communicate. The same phones, no new ones.

    Taking the car back to the dealer they cannot find anything wrong.

    Any Ideas ?
  • hawk248hawk248 Posts: 27
    Today I noticed the Air Bag light stays lit. Called the dealer I bought the car from and he wined about not having a loaner car handy and asked to bring the car in tomorrow. Called another Audi+Porsche dealer whose service shop stays open till 12:00 am Mon - Fri. The manager asked me to bring the car in and that there is service bulletin that says to upgrade the "software".

    Took the car in, and they fixed in about an hour. They also adjusted the rear doors so that they close without any force.

    I've read in this forum about Air Bag light issues plaguing 2005 and 2006 A6, primarily caused by rear seats belt tensioners. The only thing we have in the near seat in a child seat base that is anchored using the hooks (which are a pain in the rear to get to), as well as the passenger belt on the right hand side.

    Just wondering if the other owners have come across this so called Audi service bulletin regarding Air Bag light for 2005 and 2006 A6's?
  • photobugphotobug Posts: 1
    Unless your husband is very familiar with german engineering, he may not want to tackle the brakes. The abs and traction control systems are linked to the brakes, so it not a real simple task. About tires, I switched my 2002 A6 tires from Michelins to BF Goodrich. The BF's had a better traction & wear ratings than the Michelins, according to one of the car magazines. I have been happy with them both on dry pavement, and in snowy weather. Just rememner you must use a four wheel alignment, & align as recommended by Audi, or you will get significant tire wear. Hopes this helps.
  • tayl0rdtayl0rd Posts: 1,938
    Brakes are brakes. Take the calipers off, take out the old pads, put in the new pads, put the calipers back on (and some other miscellaneous tasks). It is a simple task, and your husband will be just fine working on the brakes of your car. He won't be disconnecting anything that affects the sensors for the ABS or traction control, and even those parts are simple screw-off/screw-on items.

    People are put-off from working on cars with sophisticated electronics because the whole is greater than the actual sum of its parts. The individual pieces that make up the system are simple and usually straight forward (and expensive).
  • timbo6timbo6 Posts: 1
    I have an Audi A6 2.4 automatic for the past 6 months no problem.All of a sudden the oil light,brake light and ABS light all start flashing then stop but now it is happening more regulary.I have had i checked and there seems to be no problem(it took three atempts to read the comtuper).Also the P,R,D,N,1,2,3 seems to all light up when this happens and the car seems to get stuck in one gear.It's quite annoying when i'm in the car but a bit scary when i have my 8 month old son in the back.I thought Audi were a good make.Can anyone shed a little light on this.Thanks safe driving Tim.
  • My key is stuck too...
    ever figure out how to get yours out?

  • arniet1arniet1 Posts: 1
    Have a 2000 Audi A-6 with cooling fluid leak. Dealer pressure tested radiator system, found no leaks and filled coolant to top in overflow tank. After driving additional 6k miles(total is 65K on auto)fluid is down about 4 inches in overflow tank but no visible sign of leaks. Is it going into motor? Anyone with experience on this? What is repair on this?
  • g_henrysg_henrys Posts: 4
    The check engine light (MIL) on my 2001 A6 4.2 has just turned on. I have a scanner and the codes are P0130 and P0150 which translate to oxygen sensor malfunction, pre cat. I contacted my local shop and they said it is unlikely for both sensors to be out at the same time and that it may be an indication of a bigger problem, especially since I am only at 50K miles (yes my gas cap is on correctly). Here's the rub, if I run the gas down to less than 1/8 a tank and then fill it, the MIL goes out after the forth time I start the engine. It then comes back on a day or two later. Anyone have a similar situation or any ideas what to check for?
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 44,416
    The cooling system should be pressure tested and the spark plugs removed and the plugs and combustion chambers inspected for coolant deposits. You might have a bad head gasket. Repair would be removing head, re-surfacing the head and replacing the head gasket.


  • I am a new owner of a 2000 Audi A6, 4.2L with 63,000 miles. Car is in beautiful shape....or so I thought. Very happy with car initially, but in less than 5 weeks of ownership I had a bad experience...apparently with the transmission. I was driving about 70 mph on highway when I heard and felt a loud "thump" that seemed to slow the car down. Within 8-10 seconds, a horrible sound followed, resembling throwing a set of tools into a shredder. Not one engine light or warning. Immediately pulled over (luckily) to the side of the road and it was smoking from under the car and black fluid was streaming onto the pavement. The car broker (and Audi enthusiast) who sold me the car has since told me that it was a bolt that went loose inside the transmission and ruined it. Understandably, I'm perplexed and very disappointed. I have owned Infiniti Q45, BMW 535i and Lexus without any problems at all...all with more mileage than this one. Is this "to be expected" with an Audi?
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 44,416
    There have been transmission issues with this model but I don't recall anything quite so drastic as that.


  • ccusickccusick Posts: 5
    I recently purchased a 2006 Audi A6. Since I purchased it I have had a problem with the car bogging down at slow speeds or when stuck in rush hour conditions. Sometimes I will hit the accelerator and nothing happens briefly also when pulling into traffic which can be dangerous. As I stated this problem is intermittent and I have had it to the dealer several times including as we speak and they can't duplicate the problem. Help!
  • liferulesliferules Posts: 531
    This is not uncommon. Search "drive by wire" and "tip lag" here and on Audi forums for loads of info. Unfortunately, I don't have time to type all the details...
  • ccusickccusick Posts: 5
    I have gained a good bit of knowledge from your prompt and will be visiting with the service department tomorrow when I pick up my car and share some of my newly gained knowledge thanks to you. Having said that it appears I am not the first or will be the last to share their thoughts ... darn it I really love the car besides this issue.

  • liferulesliferules Posts: 531
    Yeah, it is frustrating. You will learn how to drive it...such as avoiding starting immediately after stopping, to avoid lurching forward. The best way to avoid this is to drive in "sport" mode, which by the way, is the most fun mode IMO! I drive in "S" 75% of the time (uses more gas, but is a lot more peppy and fun).

    Best wishes.
  • I have the same problem. (2001 2.7T A6) I took the car to the dealership and they wanted $1400 to replace the two sensors. I of course drove away, hence the reason I'm fishing around the web looking for a solution.
  • ccusickccusick Posts: 5
    After I got your last posting I went and picked up my car the next morning. I was driving a Passat for three days while they searched for a problem that they would never admit exsisted. The shop foreman put a note on my receipt suggesting that I drive in sport mode as you suggested and it does indeed perform better. You really helped me to fall back in love with my A 6 and I thank you for that.... it trully is a very nice automobile.

    Happy Motoring!
  • ccusickccusick Posts: 5
    Put some Chevron high test in the tank and see if that helps also driving in S or Sport mode has really made a big difference. BTW they (AUDI) will not replace sensors on my car even though it is under warranty and they consider that a cusotmer pay option. Never use Amoco or BP gas don't know why but my car runs better without it.
  • jaydolljaydoll Posts: 120

    My lease on the my mid life fun car(04 G35 coupe/6speed) ends in two months. Replacements I have been looking at are as follows:

    03 BMW 530/5speed/sport/prem/cold weather cost of $29,500 with CPO warranty.

    03 A6 2.7T 6 speed/prem/sport bucktet seats/luxury in Alpacka beige. Cost approx $27,500

    I was shocked at how much more comfortable and peppy the A 6 was to drive than the BMW.

    Now here is the big question- the A6 has 27K and is warranted until feb 09 via certified.

    I know everything on the 2.7 T cars costs more. Have you owners of the 2002-2204 model year 2.7Ts has lots of problems?

    I understand that forums are the place to grip about problems and not usually full of driver compliments. So, all of you A6/2.7 T owners, especially ones with the 6 speed, would you do it again?

    And lastly, what can I expect in the future for problems/repairs.

    Thanks for any thoughts.

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