Why Is My Car Shaking When Idle? Have you ever experienced a rough idle or lots of shaking while you are stopped at a stop light or maybe you are slowing down, and it just starts to shake out of nowhere? There could be a variety of different reasons for this, it's not something you want to ignore as it may be a big underlying issue! We recently had a BMW X2 in the shop that was experiencing this symptom. Upon doing a full diagnosis to the vehicle, our technician found that this was coming from the Motor Mounts. After asking my Service Manager about this issue, he stated that Motor Mounts can have many names, and can be different depending on make and model of vehicle. For instance, trucks usually have Engine Mounts that are metal and rubber, whereas other vehicles like this BMW X2 have mounts that have rubber with liquid inside of them, also known as hydraulic fluid. For this vehicle, Chris our ASE Certified Master Import & Eur ... read more