Hi Guys,

Bought my 2011 Audi A4 B8 (6-speed manual) from a certified preowned dealer in 2014 with 42,000 miles on it. To be completely honest, I am an accountant, so cars are kind of a foreign language to me. Until the last couple of months, I have had absolutely no problems with the car whatsoever. In the summer of 2019 I installed a CTS intake and a diverter valve spacer, which are the ONLY aftermarkets products in the engine (just wanted to mention this). About a month ago the check engine light came on, and I had my friends father check it out. Again, cars are a foreign language to me, but i believe he was saying that oil is leaking throughout the engine or something of that sort of nature. He recommended I buy a PCV and an upgraded piston diverter valve. I believe he said the PCV fixed one of the two codes he was able to pull. Unfortunately he didn't have the necessary audi technology to definitively diagnose the issue, so i took it to an audi/vw specialist in my town. I just got back from dropping it off, told the guy basically what I just wrote above, and the first thing he said was "the turbos probably done." Still waiting for him to call me back and give me the rundown, but I still wanted to post here.

EXACT PARTS:
CTS Turbo Blow Off Adaptor for 2.0T FSI/TSI/TFSI (EA113, EA888.1 and EA888.2)
https://www.ecstuning.com/Audi-B8_A4-Quattro-2.0T/Engine/Intake/
https://www.ecstuning.com/b-uro-part...h103495ah~uro/
https://www.ecstuning.com/b-pierburg-parts/upgraded-piston-diverter-valve-06h145710d/06h145710dkt/
If my turbo is blown, should i sell the car? Could I even sell the car with a blown turbo?
The cars completely paid off, should I just replace the turbo and bite the bullet?

Please Help and give your opinion!!!!

Best,
An ill-advised audi owner lol

 

I'm no expert but have wrestled with Audis for a decade. It sounds like you are talking about a diverter or blow-off valve. When I chipped my old 2.7T, it was recommended and I did replace this with a heavy duty aftermarket unit. If the diverter valve failed, the turbo cannot work correctly. Effectively it is not building pressure because of the torn or failed valve. If the shop is reputable and this is all it is, you are looking at $200-300, maybe less (I have not replaced one on an A4). If you could post engine codes, someone may be able to help you. I have never blown a turbo, but from what I have read the car will run but have no power (it is just a normally aspirated 2.0 engine at that point).

As far as being worth replacing the turbo, that is a cost-benefit equation that an accountant s/b able to handle. Value of current car + cost of repairs vs cost of new car. I am a little biased here, and will advise that if you enjoy driving a stick, Audi stopped making them with the 2018 model year.

 

You're probably getting a P0299 underboost code. if you have 149K miles on it and you're still on your first turbo, I would put a lot of money on bad turbo. They tend to get sloppy before 100K miles. Everyone hopes its the diverter valve or the N75 turbo control valve, but at that mileage I would strongly suspect the wastegate on the turbo is sloppy.

As ppgoal said, you're an accountant, run some numbers and decide if its worth fixing. Someone will buy it with a bad turbo. Hell I would. But I'd want a couple grand discount off the book price.