2018 Lincoln Navigator Engine Problems

We purchased a 2018 Lincoln Navigator L in 2022 with 29,489 miles, and it has been great. We are at 64,351 miles, and it is making the cold-start rattling noise. We have called Lincoln for assistance, and they are refusing to help. They stated that there is no help. I took it to Duval Ford, and with other issues such as the water pump and leaks, they quoted 12,000 to fix this truck. They did say they had a payment plan to fix the vehicle. When the soft pull was opened in 2022, our truck did not make noise at that time. I believe Ford should stand by their product, and there are so many videos on YouTube addressing this vehicle.

NHTSA ID

11751102

Incident

Jul 7, 2026

The vehicle has experienced repeated mechanical failures involving the engine, cooling system, drivetrain, and electronic systems. Documented failures include the navigation/APIM module, transmission jerking and drivability issues, transmission valve body concerns, cam phaser failure, driveshaft repair, front wheel bearing/IWE failure, coolant leaks from heater core hoses, and engine vibration requiring extensive diagnostic work including a short block engine repair. The vehicle has also experienced multiple overheating incidents despite prior repairs. Overheating occurred in May 2025, December 2025, and February 2026. During these events the engine temperature rose abnormally and coolant had to be added to the reservoir. Drivetrain problems including transmission jerking, vibration, and driveshaft repair also created drivability concerns while operating the vehicle at highway speeds. These issues have been inspected and confirmed by an authorized Lincoln dealership service department. Numerous repairs and diagnostics have been performed including APIM replacement, cam phaser repair, heater hose replacement, wheel bearing/IWE replacement, driveshaft repair, and engine diagnostic work approved through warranty processes. Symptoms prior to failures included overheating, vibration, excessive fan noise, whining while driving, and transmission jerking. The vehicle and components are available for inspection upon request. The repeated overheating events combined with drivetrain and engine failures raise concern that this vehicle may have an underlying safety-related defect that could result in sudden loss of power or engine failure while operating in traffic.

NHTSA ID

11722940

Incident

Feb 1, 2026

cam phasers rattle during cold starts

NHTSA ID

11666759

Incident

Apr 28, 2025

Dealership Responsible: Ted Britt Ford of Chantilly Dealership Address: 4175 Auto Park Cir, Chantilly, VA 20151 Complaint Details: I purchased a 2018 Lincoln Navigator L Black Label, and since then, I have experienced multiple serious mechanical failures due to an improperly performed cam phaser repair by Ted Britt Ford of Chantilly in 2020. The dealership’s service department performed a faulty installation, which resulted in: •Missing and broken screws in the cam phaser system •Jerking, rattling, and acceleration issues •Significant engine damage requiring a complete short block replacement As a result of this in negligent repair, In 2024 I had to replace the cam phaser again, along with replacing the short block of the engine due to the extensive damage caused by the dealership’s poor workmanship. In addition to this issue, I have faced multiple other failures, including: •Valve body replacement •Wastegate failure •Rear heat stopped working •Steering column failure These problems have caused frequent breakdowns and safety concerns, making the vehicle unreliable. The constant need for repairs raises serious questions about the quality of Lincoln’s engineering and service network. This issue is not an isolated incident, and I strongly urge NHTSA to investigate potential defects in the 2018 Lincoln Navigator and to hold dealerships accountable for performing unsafe and defective repairs. Requested Action: I request an investigation into the faulty cam phaser repair process and whether similar issues are being reported by other 2018 Lincoln Navigator owners. This could indicate a larger systemic defect or a trend of poor-quality repairs in Ford/Lincoln service centers

NHTSA ID

11643072

Incident

Jul 28, 2024

The contact owns a 2018 Lincoln Navigator. The contact stated that while driving at an undisclosed speed, the vehicle lost motive power. The vehicle lunged forward. Additionally, the contact stated that the vehicle was shifting roughly. The contact stated that the vehicle would redline. There were no warning lights illuminated. The vehicle was taken to the local dealer, where it was determined that a transmission flush was needed. The vehicle was repaired, but the failure recurred. The vehicle was taken back to the same local dealer, who was unable to determine the cause of the failure. The manufacturer was contacted, but no additional assistance was provided. The failure mileage was approximately 86,000.

NHTSA ID

11641745

Incident

Feb 1, 2025

Mileage

86,000 mi

The car rattles very loudly upon starting every time it is started. I have lost acceleration power while driving through intersections. I took to dealership and it is confirmed it is the cam phasers. No lights have come on in dash.

NHTSA ID

11627515

Incident

Oct 4, 2023

Connector for cooling hoses blew out causing engine to overheat and stand my family on the highway. This appears to be a common problem that someone did a YouTube video on it. I have put the video link below. Please have them recall before someone gets hurt. Ford Lincoln does not respond. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11555223

Incident

Nov 7, 2023

While driving at a speed of 55-60mph, I tried to pass slower vehicles on three different occasions during the same trip on a two lane road. I pushed the accelerator to the floor and pulled the car into the lane to my left. I felt and heard a very loud clunk, revving up of the engine, and total loss of power at the wheels. I quickly moved backinto my original lane and let up on the accelerator. After a 5-10 seconds, power returned to the wheels and I was able to reaccelerate. I was able to pass the aforementioned vehicles, albeit using a more gradual acceleration. I have previously had the vehicle inspected for two identical episodes at a Lincoln dealer. Unfortunately, they reported that the service techs were unable to duplicate the problem. If this were a standard transmission vehicle, I would say the clutch was slipping. In a vehicle with four wheel drive and automatic transmission, however, I am not well enough informed to make a diagnosis. There can be no doubt, however, that the action is potentially dangerous and could result in head on collision. I would also suspect that the engine transmission train is likely to have shortened lifespan if the problem continues. It is possible that there is already damage.

NHTSA ID

11540387

Incident

Aug 22, 2023

Vehicle serviced for cam shutter. They only flashed the computer. Did not fix the mechanical problem. Engine failure shortly afterwards at 100k. Loss of power, stalled after vehicle came to rest, could not restart. Towed to nearby dealership. Complete engine failure. Entire engine replaced by Ford Dealership near Corpus Christi -- 15k.

NHTSA ID

11476187

Incident

Jan 10, 2022

The contact owns a 2018 Lincoln Navigator. The contact received notification of Manufacturer Recall Number: 21B10 (CAM Phaser PCM Reprogram). The contact stated that the vehicle was taken to the dealer and the dealer performed the recall repair. After the recall repair, the engine was rattling during start-up. The contact then received notification of Manufacturer Recall Number: 21N03 (CAM Phaser Replacement). The vehicle was taken to the dealer and diagnosed with the engine rattling on cold start. The dealer replaced the Variable Cam Timing (VCT) and performed TSB 21-2119. The failure recurred while the contact was driving at 60 mph. There was a rattling noise coming from the engine and the vehicle lost motive power. The vehicle was towed to the dealer. The dealer diagnosed that an unknown part inside of the engine had fractured and that the crankshaft needed to be replaced. The vehicle was not repaired and remained at the dealer. The manufacturer was not made aware of the failure. The failure mileage was 36,060.

NHTSA ID

11440952

Incident

Oct 5, 2021

Mileage

36,060 mi

The contact owns a 2018 Lincoln Navigator. The contact stated that upon starting the vehicle, the vehicle shuddered and made abnormal rattling and knocking sounds. There were no warning lights illuminated. The dealer informed the contact that the failure was a design failure and was caused by oil not being pumped up to the timing chain properly. The contact stated that he received an unknown customer satisfaction program for the failure however, the dealer informed the contact that the parts for the repair were not yet available. The contact also stated that while driving 50-60 MPH, and attempting to overtake another vehicle, the accelerator pedal was depressed but failed to respond, causing the vehicle to inadvertently decelerate. The contact did not recall whether there were warning lights illuminated during the failure. The contact stated that the failure had been reoccurring while driving at various speeds while attempting to overtake other vehicles. The contact stated that the warning message "Shift Fault" and other unknown warning lights were illuminated. The vehicle was taken to the dealer who diagnosed that the battery needed to be replaced. The contact stated that the battery was replaced; however, the failure reoccurred while driving. The vehicle was taken back to the dealer and diagnosed that the battery needed to be replaced and that the vehicle had lost communication with the Body Control Module (BCM). The contact stated that the vehicle was taken to the dealer several times and the vehicle had been with the dealer since July 2021. The manufacturer was notified of the failure and a case was opened. The manufacturer advised the contact to obtain a vehicle rental at his own expense and he would be reimbursed. The contact stated that he had been renting a vehicle since July and that the manufacturer had failed to cover the expenses. The vehicle was not repaired. The approximate failure mileage was 6,126.

NHTSA ID

11440563

Incident

Nov 28, 2018

Mileage

6,126 mi

The contact owns a 2018 Lincoln Navigator. The contact stated that there was a loud rattle, rough idle, and loss of power during acceleration after starting the vehicle. The vehicle was taken to the dealer and diagnosed that there was a cold start rattle on the eco-boost engine related to the cam phaser. The vehicle was not repaired and remained at the dealer. The dealer where the vehicle was purchased and Crest Lincoln (36200 Van Dyke Ave, Sterling Heights, MI 48312) were made aware of the failure and informed the contact that there was a recall associated with the failure. The manufacturer was made aware of the failure and informed the contact that the VIN was not under recall. The contact was referred to file a complaint with the NHTSA. The approximate failure mileage was 89,000.

NHTSA ID

11420551

Incident

May 11, 2021

Mileage

89,000 mi