Hello,

 

I own an Audi A3 2.0 TFSI quattro sportsback, year 2016, and I am experiencing the following issues with the Haldex - Quattro system:

 

• Quattro only works when the car is cold, usually for the first 30–60 seconds of driving.
• When the car warms up, the quattro stops functioning.
• When the quattro system engages, there is a strange grinding/squeaking noise coming from the rear of the vehicle, which disappears when AWD is no longer active.
• All four tires are the same size and wear.
• The Haldex pump, controller, and oil have been replaced, and the Haldex pump filter has been cleaned, yet the issue persists.

 

 

I would like your advice on the most likely cause, and what repair procedure you would recommend. Additionally, I would like an estimate of the repair costs.

 

Thank you very much for your help and professional guidance.

Hi. I don’t believe the Quattro system is always engaged and I never know when it is engaged. The Haldex system engages when it detects slip (wheel spin). It should be seamless and unnoticeable. You may already know all this. There are a set of plates in the haldex unit which are the clutch system. They can wear out and can be replaced. They may need replacing?