Shuddering while in idle/park

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! So, your 2014 Volkswagen Jetta is doing a little dance in idle, especially with the AC on? It’s probably not an alignment issue—your wheels aren't involved in the shudder here. Since you recently replaced an engine mount, it could be that another mount is loose or worn, or maybe the replacement mount needs a little tightening to keep things steady. When the AC kicks on, it puts extra load on the engine, so a loose mount can amplify that vibration. It's like having one wobbly leg on a table—tighten things up, and the shake might disappear. If you need further advice or want help finding a trusted RepairPal shop in your area, please call us at 877-913-1554!