Audi Engine Mount Failure Causes Rough Idle & Codes

I had a similar issue with my 2015 A6 3.0 TFSI last year. As someone with some experience working on these engines, I recognized those vibration issues right away. The symptoms you describe match what I experienced, rough idle and increased vibrations through the mounting bracket area. Initially thought it was a failed mount, but it turned out to be a loose connector at the engine mount sensor. The workshop found the cable connection was defective and needed replacement. The repair was straightforward, they diagnosed the exact issue using diagnostic equipment, replaced the faulty connection, and recalibrated the motor mount system. Total cost was 95 Euro including labor. Much better than replacing the entire mount assembly. Before jumping to conclusions about worn motor mounts, could you share: Current mileage on your A7? When did the vibration issues first start? Does the vibration change with engine RPM? Have you had any recent work done near the engine mount areas? This information would help determine if your issue matches what I experienced or if you might be dealing with actual mount wear.

I have 87102 KM on the clock and started noticing these engine mount issues right after my last service about 3 weeks ago. The vibration definitely gets worse when the engine is under load and varies with RPM. The transmission mount also seems to be affected, as shifting feels rougher than usual. The issue hasnt improved with time so Im considering getting a second opinion at a different workshop.

Thanks for the additional details. Based on your mileage and the timing after the service, this does sound quite different from my A6 connector issue. The symptoms you describe, especially the RPM-dependent vibrations and transmission engagement problems, strongly suggest actual mount wear rather than just a sensor issue like I had. When multiple mounting brackets show problems after a service, its worth checking if any motor mount components were disturbed during the work. Since I got my A6 fixed, I learned more about these 3.0 TFSI engines and found that the rubber mounts typically start showing wear around 80-90k km. The fact that your issues began after service could mean the worn mounts were stressed during maintenance work. For comparison, when I later had to replace my actual engine mounts (about 6 months after the sensor fix), the total job cost was around 850 Euro including parts and labor. They replaced both the defective engine mount and transmission mount since they tend to wear as a pair. Consider getting a diagnostic scan specifically focused on the mounting system. A proper inspection should be able to determine if your mounts are actually worn and need replacement, or if something was simply misaligned during the recent service.

The vibration from my engine mount definitely seems more serious than your sensor connection issue. Thanks for sharing those details about the 3.0 TFSI mount wear patterns, it matches up with my situation since Im right in that 80-90k km range where problems typically start. Im going to schedule an inspection at an independent workshop that specializes in these engines. The symptoms are too consistent with worn motor mounts to ignore, especially with the rough shifting and RPM-dependent vibration issues. The timing after my service makes me wonder if they spotted something but didnt mention it. Going to request they check both the engine mount and transmission mount while theyre at it. That 850 Euro cost reference helps set my expectations for the repair budget. Will update once I get a proper diagnosis of the mounting bracket system and find out exactly whats causing all this vibration.