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2001 Audi TT 1.8 QC - Turbo performance issue

Hi, I recently bought this TT...had about 96000km's on the clock. Great car! I had to replace the Master Cylinder...and after I received back my car the overall performance was to say the least - EXCELLENT!!...but about 2 weeks seems as if the turbo doesn't work anymore....the car still accelerates fine...but not the "shooting arrow" effect I had with it after getting it back from the service centre.....what can it be?? Vacuum problem?? leak in a pipe??? Please, please just give me an idea on what to look for??!!

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  • Anonymous Nov 14, 2008

    My issue is the same as that stated. I have a 225HP Audi TT Quattro. One day I had a "shooting arrow", the next, just a reasonably fast car. it appears the boost provided by the turbo just stopped one day. It was not a gradual decline in performance.

  • Anonymous Mar 14, 2009

    2001tt timing belt



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Posted on Jan 02, 2017

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SOURCE: 2001 Audi TT - feels as if the turbo doesn't kick in???!!!

If you are shuddering, it's the MAF or bad spark.
If you have no boost, it can be many things.
-Vacuum Leak
-Bad MAF (ebay has them for us$90, just make sure you get the exact p/n)
-Bad wastegate controller (N75)
-Bad wastegate actuator (the actual wastegate valve, or the vacuum controlled plunger)
-Bad or stuck Blowoff/Diverter Valve

My TT just had the weirdest of "no boost problems". it would throw a code, saying the wastegate was stuck open, and i would have no boost. If I disconnect the battery and reconnect after 5 minutes, i would have full boost; and everything would work great for anywhere between 20 minutes-10 days!

It turned out to be a dirty Boost Pressure Sensor (aka Thrust sensor). It is a $130 part. I finally found the location of it on my 2001 TT Quattro (AMU), it's just below and in front of the battery between the driver's side intercooler and the intake manifold, connected to a hard black plastic intake pipe. It is held on with 2 silver-colored torx screws. It has a connector that gets plugged-in facing the passenger side of the car. Once you pull it off, you will see it has a funnel shaped tip. I took it off the car and poured isopropyl alcohol (99%) into the inlet hole on the funnel shape. I shook the alcohol around and then shook it out. I let it dry, put some silicone grease on the seal, and hooked it back up. The car has been working great so far. If it starts having problems again, i am just going to throw in the $130 new part, and hope for the best.

Posted on Nov 06, 2008

  • 2559 Answers

SOURCE: Audi TT 2004 1.8 turbo auto tiptronic transmission

It is not recommended by the manufacture to change it,They say it is lifetime fluid.

Posted on Jan 07, 2009

  • 22 Answers

SOURCE: Audi TT 08 Roof wont close

Yes if you go into the trunk you will find a small passage to get to the pump there will be a little T- shaped knob on top turn this untill it stops and you will be able to lift the top to close it.

Posted on Sep 07, 2009

michigan man
  • 3533 Answers

SOURCE: Has any one got a breakdown diagram for rebuilding

the best thing for you to do is go to your local library and get your hands on a Haynes auto repair manual for your car or if you going to keep the car for a while it best to buy one i have one for all of my cars wish you the best of luck Michigan Man

Posted on Dec 27, 2009

  • 1874 Answers

SOURCE: I need the cam timing set up for a 2000 Audi TT

The 2000 Audi TT 1.8 liters engine timing belt set up:

af7091b.png The 2000 Audi TT 1.8 liters engine rear chain & tensioner set up:


Posted on Feb 07, 2010

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Hi I have a audi tt 2001 model 180 bhp turbo v 5 and I am having intermittent starting problems any ideas thanks

check for sure the batt and charging.that can cause lots off problem.
weak batt gifs weak spark charge chould be round 14.7 not 14.9
that toomuch also not good.check sparkplug wires and rotor,if needed,
to replace use original parts.check also pipes off the turbo.

Jul 26, 2014 | 2001 Audi TT

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1 Answer

Fuel cap and boot release buttons not working

I have a 2001 Audi TT Audi TT roadster, 87,000 miles. I love the car, but like all cars, things happen.

Open your checkbook, It is the command module , under your back glass, where the top goes , you will see a small door cut into the felt. Mine got wet and started a whole chain of events.

Seal that Window Good. 800$ repair to replace the comman module.

1. Windows were going up and down 1/4" all random times.
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4. Trunk would not open automatically.

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Good Luck.

Jan 05, 2009 | 2001 Audi TT

4 Answers

2001 Audi TT - feels as if the turbo doesn't kick in???!!!


I just has my TT serviced and they replaced the plugs and air filter, I just don't get the turbo performance anymore. It aslo used to kick in around 3500 and push me back in my seat with a nice sqeal of the nothing no boost just a crawl.

I think I will have to take it for tuning.

Sep 16, 2008 | 2001 Audi TT

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