Jeep Compass Rough Idle Points to Failed Mounts

A failed motor mount can definitely cause those symptoms. Last month, I dealt with similar issues on my Jeep Cherokee hybrid 2019. The engine movement and rough idling were caused by a deteriorated rubber mount on the transmission side. The mount failure creates excessive engine movement, which can stress electrical connections and sensor wiring. When the engine mount deteriorates, it stops dampening vibrations effectively, leading to that rough idle feeling. The repair involved replacing both the transmission mount and one engine mount. This turned out to be a serious issue because the excessive movement had started to damage nearby components and wiring harnesses. The rubber mount material had completely broken down. A proper diagnosis is crucial, have a mechanic check all motor mounts while the vehicle is lifted. They should observe engine movement while the car transitions from park to drive. Bad mounts will show obvious excessive movement. This is not something to postpone, as failed mounts can lead to more expensive repairs if left unchecked. The symptoms you describe match classic mount failure indicators.

Thanks for sharing your experience. I had nearly identical mounting bracket issues with my Compass last year. The vibration issues started small but got worse over time, especially at idle. The rubber mount completely failed after I ignored it for too long. Did those mount replacements solve all your problems? Just curious about the final cost too, since my repair ended up being more expensive than initially quoted due to some damaged wiring harnesses they found.

After replacing the worn motor mount, all vibration issues disappeared completely. The mechanic found the main problem was actually a loose cable connection near the mount area, which was causing those error codes. Lucky for me, there wasnt any additional mount wear or damage to surrounding parts. The total repair came to 95 Euro for fixing the cable connection and checking all mounting points. Much cheaper than expected since no complete mount replacement was needed. The excessive engine movement stopped once they secured everything properly. The original mount failure symptoms matched yours exactly, rough idling and error codes. Getting it checked early before the rubber mount completely deteriorated saved me from more extensive repairs. Its worth mentioning that regular mount inspections can prevent these issues from developing into major problems. When your motor mounts are working correctly, you shouldnt notice any unusual movement or vibrations. Since the repair, the engine stays firmly in place even during hard acceleration.

Thanks everyone for the input. Just got back from the shop and wanted to share how it went. The mechanic found two completely failed mounts that were causing all my issues. The transmission mount rubber had torn apart, and one engine mount was severely damaged. The total repair came to 780 Euro which included replacing both mounts and fixing some minor wiring damage. More than I wanted to spend, but the difference in how the car runs is incredible. No more shaking at idle, and the error codes have disappeared. What surprised me most was seeing the old mounts, they were in much worse shape than I expected. The rubber was completely deteriorated. Lesson learned about not waiting too long when these symptoms first appear. The car feels solid now, like when it was new.