Question about 1999 Audi A6

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1999 Audi A6- Aux Fan Very Loud- how to replace?

I have a 1999 Audi A6. The aux fan that goes on when the car is first started works fine except it is VERY loud. Sounds like the motor bearings are bad. I know this is a common problem for this model. I would like to replace. It is in a tight location. Any advice/pictures/ youtube videos on the easiest way to replace would be greatly appreciated. Thank you in advance for your help.

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Audi A3 2002 model auto - temperature gauge not working

The guage and fan speeds work on independant sensors. If you can remove the plastic engine cover and locate the "sending unit" for the gauge disconnect it and restart the engine. The gauge should remain cold and not move. If this is the case replace the sending unit. This should be a single wire sender located in the waterjacket of the intake manifold look in the area where the upper rad hose enters the intake.

Posted on Mar 21, 2009

  • 98 Answers

SOURCE: starting problem on my audi a6 2.8 quattro,,, i need help

Sounds like the gas presser valve or weak fuel pump. When it dose it again turn the switch on and leave it on for about 3 mins. and see if it will start. If it dose I would say the pump is weak.

Posted on Sep 23, 2009

  • 1 Answer

SOURCE: Electric aux fan continues to cycle on and off

my 2006 Audi A6 has been recalled by Audi for the same problem and is having a new wiring harness fitted by Audi for free

Posted on Feb 13, 2010

  • 6 Answers

SOURCE: 1999 Audi A6. The car will not start, engine

Have you checked to see if there is spark at the plugs? If not, simply take out 1 plug (can be any one of them), connect the plug wire to it and just let the threads of the plug rest anywhere on the engine block. Have someone turn the motor over while you are looking at the gap on the spark plug. If your distributor is sending sufficient power, you should see a nice healthy spark! If no spark, then your problem is either bad coil, bad distributor, distributor cap, rotor, or ignition. But first things first, check to see if you are getting spark.

Posted on Mar 08, 2010

TDISLine
  • 1874 Answers

SOURCE: i want to replace a

The serpentine belt diagram for 1999 Audi A6 1.0 TDI:

tdisline.jpg
CS = Crankshaft
F = Fan pulley
Gen = Alternator
T = Tensioner
AC = Air Conditioning
PAS = Power Assisted Steering

Posted on Nov 03, 2010

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1 Answer

My 2001 audi a6 over heats when AC is one for a while. also when in traffic. as soon as im moving, the temprature guage comeback to normal. aux fan works.


It sounds like it may be time for a coolant system flush to remove accumulated sludge in the system. You could also have some corrosion if you haven't drained the system and replaced the coolant in several years as it can loose corrosion prevention over time. It may also be a good time to have the thermostat replaced in case it is getting a little sluggish on opening. You can also take your garden hose with the spray nozzle and clean the accumulation of stuff on the condenser and radiator in the front. Some or all these measures should help.

Feb 25, 2015 | 2001 Audi A6

1 Answer

Cooling fan fuses/relay


Under hood driver's side aux fuse compartment. Believe they are maxi fuses either 30 or 40 amp in addition to relay.

Jan 21, 2014 | 1997 Audi A6

2 Answers

Why is my 2001 audi a6 is overheating 140,000 miles


Hi there:the Audi manual never talks about a 2 stage aux fan just that the aux fan runs with ac on and it can run with out ac on if there is an overheat issue on the coolant side where as the a4 info clearly states a 2 stage aux fan system that would lead me to think the early 4.2 did not use a 2 stage system. Your car is not overheating and boiling over out of the coolant tank it is showing a little hotter than what would be perfect but it is still in what Audi calls acceptable range. The whole coolant system is new I would start looking at your sensor and gage systems there is a coolant sensor in the rad but that is most likely new if they replaced the rad. The gage uses a temp sensor on the engine for the gage I would replace that sensor and test the gage with a resistance input tool we have at the dealer. Could be a gouge or the wiring to it. There is a coolant fan module that could be defective if your sure there was a two speeds to the aux fan.


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Mar 29, 2012 | 2001 Audi A6

1 Answer

I need to replace the AUX AC fan on my A6. Do I have to remove the entire front fan assembly, disconect the AC hoses.


you just remove glow box on passenger side . open the box look the frame some bolts around disconnect inner light and cooling pipe . check the blower motor you can remove by slip it down without remove housing

Jun 21, 2011 | 2002 Audi A6

1 Answer

My audi A6 1998 model has a high temperature problem, the auxillary fan has been fixed but yet the teperature keep rising. Lnfact it looks like the engine oil is beginning to smell burnt. Help me, what do...


the tempeture fans are cotrolled br the cooling sending unit thier a cheap fix easy to in istall aiso there is one for aux fan and other fan comes on automaticly when air is on so make sure there both running at the right times GOOD LUCK B. HARRIS A.S.E. CIRTIFIED 25YRS.EXP.

Apr 28, 2011 | 2000 Audi A6

1 Answer

I want to replace a new fan belt on my audi a6 1.9tdi, 1999, but i need a diagram


The serpentine belt diagram for 1999 Audi A6 1.0 TDI:

tdisline.jpg
CS = Crankshaft
F = Fan pulley
Gen = Alternator
T = Tensioner
AC = Air Conditioning
PAS = Power Assisted Steering

Nov 03, 2010 | Audi A6 Cars & Trucks

1 Answer

Looking for scheme of fan belt for audi a6 2.5 tdi 150 bhp 1999 year Thanks


The fan belt routing scheme for Audi A6, 2.5 TDI, 150 HP, MY 1999

564eb29.jpg
CS = Crankshaft
F = Fan pulley
Gen = Alternator
G = Guide pulley

T = Tensioner pulley
AC = Air Conditioning
PAS = Power Assisted Steering

Oct 16, 2010 | Audi A6 Cars & Trucks

1 Answer

Bought a used 93 mazda protege.(as is) A/C compressor does not start or engage.. When warmed up and running large primary fan is on. I fouund aux fan fuse removed from fuse box.under hood. I also found aux...


Sounds like u have a bad fan for 1,Im sure who disconnected it may have found an expensive problem they didn't want to deal with (electrical, ac compressor etc) Good luck, have it ckd

Apr 07, 2017 | 1993 Mazda Protege

1 Answer

Alternator belt broken


Audi A6 (1999 fabrication year):
1. Release the fan belt tensioner.
2. Remove the broken belt.
3. Put the new belt correctly in place.
4. Set-up the fan belt tensioner.

If you specify the engine type of yours car I will send you the fan belt routing diagram!

Apr 07, 2010 | 1999 Audi A6

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