I just bought a 1.8tq 5 speed. I think my turbo is shotting the bed though so i been looking for a stock replacement or an upgrade. So i went to audi an asked if the s4 turbo could fit. The guy said no

My question is was he correct? And wat r the difference between the two?

Im also having a few issues with my car if anyone wants to shRe some knowledge im fairly new to this audi acene

 

What year is the A4? B5 A4's use the same turbos as a B5 S4, its just the A4 only has one where-as the S4 has two. Yes, it could be used to replace it. But, if you're going through that much trouble you should either get a K04 from an RS4 or something similar. Anything EXCEPT the K03 which are stock on A4/S4's. And also, look online for one, don't go to the dealer to buy it. There is a ton of websites to get the right stuff for a lot cheaper then dealer pricing.

 

I have a 2001 a4 1.8tquattro i think my turbos on its last leg. It like pulls and stops then repulls it dont feel right like a wastegate issue maybe? Which is y i might juat upgrade

 

From what I've read, the S4 turbo is not a direct replacement - you'll have to modify it somehow to make it work, and I think it's more than just clocking the housing.

 

from the sounds of it and personal experience it sounds like a wastegate actuator.

the turbo itself will make a really bad noise, like a dentist drill, when its going bad (ideally) a lot of the times you cant buy the actuator brand new separately however you can get one from a partout or junkyard.

id just replace it with a ko4 like previously mentioned, its a tad bigger with more aggressive fins. i think good for another 30HP or so.

 

How much does the ko4 go for?is it a direct relacement?wen i first turn the car oit makes like a whining noise for a minute then stopsn

 

Like anything, search online. Prices will vary. Search and FAQ sticky will give you the 411 on using a k04. If that whine you're talking about is when the engine is cold, it's the SAP. I'm betting the whine stops atvtge same time you drop from high idle to normal idle.

 

Lol wow i must be speakin noob...thats exactly wat it does bit wat is the sap?can i fix that? Also u know that light with the aarow goin around it and my abs light sometimes come on but a simple turn off and on takes them off. And occasionally the same wit my check engine wit my cas. I got the code around here somewhere. Any idea?

 

To fix the SAP requires replacement - when it makes that sound it's shot. You'll have to pull the front of the car to change it.

 

Is it okay to drive on?is that a part i can purchase at autozone? And is that wat its actually called