FYI: Document every issue with service records, your own notes and pics of any messages that appear in the message center. We also have a 2018 Compass and our issues started just like yours and progressively got worse, even after they replaced the engine. We started receiving messages that an oil change was required and it barely had 4000 miles on it. Compression tests showed issues and upon further examination they found all the cylinders were scored. Our Jeep sat at the dealership for more than a month waiting to get the new engine installed. After the new engine was installed we had numerous electrical issues that no service dept. could explain and the oil consumption in the second motor was as bad as the first. When the second engine had 2500 miles on it, we again received a message stating an oil change was required. Took back to the dealership that installed the new engine and after seeing the oil level in only 2500 miles a decision between dealership and Jeep Chrysler was to start an oil consumption test (one of many). We would return to the dealership at different mileage intervals where they would check the oil level. During that consumption test they added more than 3 quarts of oil in roughly 4500 miles, but because Jeep Chrysler considers that within their limitations nothing else was done and they (the dealership/Jeep Chrysler closed the case. I was not happy when I was told the case was closed because I felt that was a ridiculous amount of oil for a new vehicle to use. I shouldnt have to monitor the oil level on the dip stick between 5000 miles oil changes because this engine is an oil burner! Little did we know this was only the beginning of issues to come with this Compass. Over the short time we’ve owned this vehicle I have it to a service dept. (30+) times. Each time I complain about an issue they put it on the computer and no codes show up. So because it’s not throwing a code I’m told there’s nothing wrong with it, even though we have pics & videos of the messages that appear in the message center. Here are a few of issues we’ve had-
1. The engine override (engine shuts off at stop signs/lights) works when it wants to and has even malfunctioned to the point where we couldn't turn it off or on for 5 days and then it just came out of it and worked until the next time it acted up.
2. Traction Control and 4WD symbols come on in the message center at random, even when there is no snow or ice on the roads.
3. Radio blacks out and resets itself
4. Message saying the Key Fob has left the vehicle and its sitting in the passenger seat.
5.Interior lights do not come on when you open the doors
6. Message Center says engine is running but won’t let you shift into Drive or Reverse
Only way we figured out how to reset this when it happens is to open and close the front doors multiple times to try and reset whatever isn't working correctly.
7. Vehicle would not shut off until multiple attempts were made. Then restarted itself and was revving at full rpms for almost an hour before someone came into my daughters work and asked her if she knew her Jeep was running full tilt? My daughter went out, a bit shocked and not knowing what to do, opened the drivers door and the engine instantly idled down to normal rpms.
8. 60,000 mile tires worn off in less than 20,000 miles but they cant explain why. I paid for an alignment test to see if out of align and test came back that vehicle was perfectly aligned. But yet we got stuck having to buy another new set of tires for it just so we could get it inspected. After more than a year of fighting with Jeep Customer Care they finally offered us an extra incentive to trade in the Compass. The extra incentive they offered was a joke and we declined. We had a $5000 down payment wrapped up in this vehicle and are paying almost $600 a month and Jeep never took any of that into consideration when asking us to trade vehicles. Like we could just walk away from $5000 and start over. I opted to take our case to a third party Arbitration Company because I felt we were stuck with a lemon and were being taken advantage of. I spent many hours preparing a letter in chronological order and providing service records, notes and pics for every issue we’ve had. I presented it to a panel of 5 individuals and after reading my evidence I won my case. We are now in the final stages of getting a replacement vehicle and Jeep Chrysler is taking our Compass back. We had the option to upgrade so we took advantage and are getting a new 2019 Jeep Cherokee. Fingers crossed this new vehicle isn't a lemon too. We’re pretty disappointed with our first Jeep buying experience. It was a long struggle to get Jeep to do something for us, but I felt wronged and I was persistent and I hope it pays off in the end.