2018 Lincoln Mkz Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2018 Lincoln Mkz, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Engine1235.3%
- Powertrain (other)926.5%
- Fuel system25.9%
- Exterior lighting25.9%
- Driver assistance25.9%
- Electrical25.9%
- Visibility12.9%
- Body & structure12.9%
- Brakes12.9%
- Other / unspecified12.9%
- Airbags12.9%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Engine
Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.
From owner reports, verbatim
The engine light came on. The car suddenly wouldn’t go past 35 mph . Thankfully I was on a local road. I had it towed to the dealer and was told that the engine needed to be replaced because coolant leaked into the engine. There were no warning lights except the day of . The car did not give any indication of a leak. Nor was it running hot. Everything was functioning fine.
My 2018 Lincoln MKZ began misfiring on startups. Eventually the check engine light came on with a code of P0302. About a week later while driving, the engine temp gauge reached the hottest temp reading on the gauge. I had to immediately pull over. Upon pulling over I immediately checked the coolant level in the overflow reservoir and it was empty. After refilling with coolant I was able to drive the car home. Over the next few days I monitored the coolant level but at the same time the car was experiencing rough startups and smoke coming out of the exhaust upon startup. Sometimes turning the engine off and restarting it would stop the smoke, but sometimes it wouldn't. I began doing some research and discovered, Technical Service Bulletin (TSB) 19-2346, which explains my exact experience with my 2018 Lincoln MKZ. I have yet to take my car to the dealership for repairs due to the costs that are expected to have this issue resolved. Documents in the legal case, Miller, et al. v. Ford Motor Company (Case No. 2:20-cv-01796) claim that Ford was aware of this defect in their vehicles dating back to 2010. I purchased my 2018 Lincoln MKZ back in 2019.
Powertrain (other)
Powertrain reports that are not specifically the engine or transmission — driveshafts, axles, transfer cases and differentials.
From owner reports, verbatim
Scanned codes P0741, P1450, P1744, & P2196. Check the transmission fluid level and condition. No fluid drained from hole, added a little fluid, and retrieved a sample of the fluid. The fluid is very dark. Identifix states, if the fluid smells or has the appearance of being black due to internal clutch slippage, the transmission should be replaced or overhauled. If the transmission fluid is in good condition and found to be at the proper level, monitor the Torque Converter Clutch actual slip (TC_SLIPACT) and TCC desired slip (TC_SLIPDSD) PIDs through the scan tool as the vehicle is driven noting these reading should stay relatively closed together expecting the reading to show to be within 10 RPM of each other. Seeing the values spread apart supports the setting of the P0741 and P1744 codes. Note that excessive TCC slip can be caused by multiple internal factors including mechanical failure of the TCC solenoid, an issue of a valve body component that does not hydraulically react to the activation of the solenoid, a leaking valve body gasket, a leaking input shaft seal, or failure of the torque converter seal. There are no external testing measures that can be taken to verify any of these as the specific cause of the concern. Per the test drive, the difference between actual and desired TCC slip was 100-125 rpm.
The car had an internal transmission failure and caused most of the transmission fluid to leak out between inspections. Upon removing the cv axle on driver’s side, the seal was fine and replaced along with cv axle. The fluid drained and was only about half a liter (needs about 4.5L normally). After servicing the transmission fluid, the dealership did their assessment and came to the following conclusion. “ Good Afternoon Sir We found the transmission system requires replacement due to an internal fault, including damage to the transfer shaft and bearings, with potential additional internal damage. Replacing the transmission can help restore smooth gear shifting and overall drivetrain functionality. To replace the transmission, you are looking at $9000.00 out the door. My apology on taking much longer to diagnose this properly. If you have any other questions please let me know. ” The drastic transmission failure which makes noises and engages and disengages while on cruise control shows the failure internally. Many metal pieces were found among the fluid when drained. This could and still can easily leave someone on the middle of the road with no time to drive to the shoulder. Car still has less than 100k miles with the severe transmission failure and the fluid leak which occurred prior to the transmission making noise. Essentially, the internal components caused the leak which the caused even more damage. I’m quoted $9,000 for the repair which occurred really early in the car’s life. I do a lot of longer trips away from home and can easily be left stranded in the middle of nowhere or even cause huge accidents when in heavy fast moving traffic if I lose drivability or if metal components fly off. The cv axle moves in and out of the transaxle side meaning the shaft can pop off as well.
Fuel system
Reports naming fuel storage or delivery — tanks, pumps, lines, injectors and fuel leaks.
From owner reports, verbatim
Scanned codes P0741, P1450, P1744, & P2196. Hard starts after fuel refills.
2018 LINCOLN MKZ. CONSUMER WRITES IN REGARD TO FAULTY FUEL PUMP. THE CONSUMER IS REQUESTING TO BE REIMBURSED FOR THE FAULTY FUEL PUMP.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Exterior lighting
Reports naming headlights, tail lights, turn signals and other exterior lighting.
From owner reports, verbatim
The contact owns a 2018 Lincoln MKZ. The contact stated while driving at night at approximately 35 MPH, the low beam light's visibility was blinding and made the vehicle unsafe to drive. The vehicle was diagnosed at a local dealer with a headlight failure. The manufacturer was notified of the failure. The approximate failure mileage was 20,300.
REAR LIFT GATE ASSEMBLY CENTER LED STRIP IS FILLED WITH WATER. THIS CAUSES AN ELECTRICAL SHORT CONDITION THAT RESULTS IN THE REVERSE LIGHTS TO BE ON AT ALL TIMES WHEN DRIVING. VEHICLE WILL NOT PASS MA INSPECTION AND HAS BEEN CITED FOR THIS INFRACTION. NO DAMAGE TO LIFT GATE, EITHER A PART OR MANUFACTURING DEFECT.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Driver assistance
Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems.
From owner reports, verbatim
This is [XXX] my customer is missing and has been missing since 7:45pm 8/17/21 by this vin number i was wondering if you could put a trace on the vin number 3LN6L5D92JR[XXX] PARTS OF THIS DOCUMENT HAVE BEEN REDACTED TO PROTECT PERSONALLY IDENTIFIABLE INFORMATION PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).
TL* THE CONTACT OWNS A 2018 LINCOLN MKZ. THE CONTACT STATED THAT WHILE DEPRESSING THE WINDOW SWITCH FOR THE DRIVER'S SIDE REAR WINDOW, THE BLIND SPOT WARNING SYSTEM WAS DEACTIVATED. THE VEHICLE WAS NOT DIAGNOSED NOR REPAIRED. A DEALER WAS NOT CONTACTED. THE MANUFACTURER HAD NOT BEEN INFORMED OF FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 6,000.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
TL* THE CONTACT OWNS A 2018 LINCOLN MKZ. THE CONTACT STATED THAT WHILE DEPRESSING THE WINDOW SWITCH FOR THE DRIVER'S SIDE REAR WINDOW, THE BLIND SPOT WARNING SYSTEM WAS DEACTIVATED. THE VEHICLE WAS NOT DIAGNOSED NOR REPAIRED. A DEALER WAS NOT CONTACTED. THE MANUFACTURER HAD NOT BEEN INFORMED OF FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 6,000.
REAR LIFT GATE ASSEMBLY CENTER LED STRIP IS FILLED WITH WATER. THIS CAUSES AN ELECTRICAL SHORT CONDITION THAT RESULTS IN THE REVERSE LIGHTS TO BE ON AT ALL TIMES WHEN DRIVING. VEHICLE WILL NOT PASS MA INSPECTION AND HAS BEEN CITED FOR THIS INFRACTION. NO DAMAGE TO LIFT GATE, EITHER A PART OR MANUFACTURING DEFECT.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Visibility
Reports naming windshields, glass, wipers, defrosters and mirrors.
From owner reports, verbatim
On 10/20/2022 while driving the sun roof exploded. Nothing hit the roof. The glass shatter all around the perimeter of the roof. The sound was like a shot gun blast next to your ears. Fortunately, the shattering glass did not cause a wreck or injury. The Ford garages I called stated I would have to pay for the damage. It seems this is not an uncommon occurance.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Body & structure
Reports naming the vehicle structure, frame, body panels, doors, hood and trim.
From owner reports, verbatim
REAR LIFT GATE ASSEMBLY CENTER LED STRIP IS FILLED WITH WATER. THIS CAUSES AN ELECTRICAL SHORT CONDITION THAT RESULTS IN THE REVERSE LIGHTS TO BE ON AT ALL TIMES WHEN DRIVING. VEHICLE WILL NOT PASS MA INSPECTION AND HAS BEEN CITED FOR THIS INFRACTION. NO DAMAGE TO LIFT GATE, EITHER A PART OR MANUFACTURING DEFECT.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Brakes
Reports naming service brakes, the antilock braking system, brake hoses, master cylinders or the parking brake.
From owner reports, verbatim
The contact owns a 2018 Lincoln MKZ. The contact stated while driving approximately 3 MPH, the brakes locked up. The ABS warning light was flashing on the instrument panel. The vehicle was taken to a local dealer who was unable to determine the cause of the failure. The manufacturer was notified of the failure. The approximate failure mileage was 21,000.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Other / unspecified
Reports whose component NHTSA recorded as unknown, or that do not map to one of the categories above.
From owner reports, verbatim
Wheel lug nuts get swollen due to the material used causing problems when the wheels need to be removed. I was lucky to not be in an emergency situation needing to change a wheel out. This could have easily happened and I would have been unable to change a wheel on the side of the road. I went to Costco to get my tires changed and they refused to take the wheels off because the wheel lug nuts were ALL swollen and could cause issues on removal or/and installation. They were afraid of stripping the hardware during removal or being unable to torque to spec during installation. The replacement of the wheel lug nuts with parts that wont recreate the problem was about $90 and taking an extra day for the tire replacement appointment plus me replacing it on my own saved on labor.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Airbags
Reports naming the air-bag system — deployment behaviour, inflators, sensors and warning lights.
From owner reports, verbatim
I had a accident almost a year ago if not longer. I hit a deer on the freeway they couldn’t understand why my airbags didn’t deploy. They say the bar was cracked in two different spots that makes the airbag deploy. Luckily my car wasn’t total for that reason. But I always wondered why my airbags didn’t deploy ? I thought I should let you know that .
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .