rear engine rotor grounding ringFix the Most Common Audi e tron Problem Save Time, Money & Stress If you own an Audi e tron, you may be familiar with a common issue: rear drive unit rotor bearing failure caused by weak grounding. This can lead to increased noise and ultimately serious motor damage. Instead of paying thousands at the dealership or waiting weeks for repairs, you can fix the problem yourself. This upgraded grounding ring provides superior protection against bearing