There are 2 stored owner reports matching the engine leading-label group for the 2012 Jaguar XJ in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)The engine has issues where there is a jerk while accelerating at times. I was told of a misfire issue that Jaguars have and have not been corrected. I was driving my 2012 Jaguar XJ on the interstate when it started slowing down. The engine light than appears on the dash and it starts to jerk as I try to speed up to get off the highway it goes from 60mph to 45mph. I take my foot off the gas and press the gas again for the car to jerk and accelerate slowly back up to 60mph. Not only was I almost hit from behind but almost crashed trying to get over and off the road for my safety and others. I was told by a mechanic the car needed a new gas treatment, fuel cap, and tune up all this money paid and no results. The 2012 Jaguar xj still stalls when accelerating. The buttons are melted into a gummy substance and a barely used sunroof wont close has a loud noise when button is touched to try and close it. Worse experience ever with my 1st and last 2012 Jaguar XJ.
I TOOK MY CAR IN FOR AN ALIGNMENT. AFTER CHECKING UNDER THE CAR, THE MECHANICS REALIZED THAT THE COOLANT TUBING WAS MADE OF PLASTIC AND BROKE. THEY STATED THAT IF I DROVE THE CAR, I WOULD BE IN DANGER OF THE CAR SMOKING AND MAYBE CATCHING FIRE. I HAD TO REPLACE THE COOLANT. I WAS INFORMED THE JAGUAR HAS CHANGED THEIR ENGINEERING OF THIS RISK DUE TO THE NUMBER OF COMPLAINTS AND REPAIRS. I ALSO HAVE A 2012 XF AND IT HAS THE SAME ISSUE WITHIN THE SAME WEEK WHICH IS COSTING ME $2200 TO REPLACE. THIS IS A SERIOUS ISSUE IF THE COOLANT ISSUES RESULTS IS SMOKING AN POTENTIAL FIRE OF THE ENGINE.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.