RS7 Engine Mount Wear Causing Rough Idle & Error Codes

The rough idling and vibration issues you describe match what I experienced with my 2020 RS6. Initial diagnosis revealed a defective engine mount, which was causing excessive movement and vibration transfer to the chassis. The transmission mount and engine mount assembly both needed attention. A proper inspection showed deteriorated rubber bushings and a compromised mounting bracket on the passenger side. These symptoms typically start with minor vibrations at idle and progress to more noticeable shaking when the engine is under load. The stored error codes often appear because the excessive engine movement can affect sensor readings and connections. In my case, the cable connections near the engine mount were getting stressed due to the extra movement. This is a serious issue that should be addressed promptly, as continued operation with faulty mounts can lead to additional component stress and potential damage to other engine and transmission parts. The repair required specialized tools and proper alignment procedures to ensure correct positioning of all mounting components. A qualified mechanic will need to perform a thorough inspection of all mounting points, as these components typically wear at similar rates. The entire job involves checking both the engine and transmission mounts for proper rigidity and integrity of the rubber isolators.

I had the exact same issue with my RS7 last year. The failed mount was causing terrible vibrations, and it turned out both the motor mount and transmission mount needed replacement. The rubber mount deterioration was worse than expected when they opened it up. Got it fixed at a specialist shop after 2 days, mount wear usually leads to other problems if left too long. Really curious how much you ended up paying for the full repair? Did you have any other issues pop up afterward? My car has been solid since the fix but good to hear others experiences.

Had the car checked by my mechanic last week and the main issue was indeed the defective engine mount they found. The inspection revealed the cable connection near the mount was also damaged due to the excessive vibration issues. Total repair cost came to 95 Euro for fixing the connection. The failed mount was causing those error codes to pop up due to loose connections, but once properly secured, all codes cleared. No other mounting bracket or rubber mount components needed replacement in my case, which was fortunate. Since the repair, the car runs perfectly smooth with no vibrations at idle or under load. Regular checks are important though, as mount wear can develop gradually and cause similar problems down the line. Really glad to hear your repair has held up well too.

I finally took it to my trusted mechanic last month. The bad motor mount was causing more damage than I initially thought. They found the transmission mount was starting to crack too from compensating for the failed mount on the engine side. Total repair came to 780 Euro including parts and labor. They replaced both the engine and transmission mounts plus fixed some wiring that got damaged from all the vibration. The rubber mount materials they used were high grade stuff. Really happy with how it turned out. The car runs perfectly smooth now and all those annoying error codes are gone. No vibration issues since the fix either. Definitely worth getting it done properly rather than letting mount failure cause more problems.