5LMJJ2LT1MEL178722021 LINCOLN NavigatorReserve

My husband secured our infant into the car seat and attached the seat to the base installed in the car. He then drove our child. When he removed the car seat it was discovered the right side of the seat (when facing) was not clicked in and could be lifted up. When he removed the seat he noticed the clip on the inside of the shell, that connects to the base, was completely missing meaning he had been driving our child only partially secured. When we turned the car seat to take a picture the retractable clip on the outside of the same portion fell out. We just got this car seat in XXX (new) and have only used it since our son was born at XXX. He is [XXX] old and well below the weight limits. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I am reporting a serious intermittent transmission and loss-of-propulsion problem with my 2021 Lincoln Navigator, VIN 5LMJJ3LT6MEL05416. While driving, including at highway speeds, the transmission will unpredictably behave as though it has shifted into Neutral even though the vehicle remains in Drive. When I press the accelerator, the engine responds, but the vehicle temporarily has little or no propulsion. The transmission may then suddenly re-engage and slam or bang forcefully back into gear. This can also happen under very light throttle. I may gently press the accelerator expecting normal acceleration, but instead the vehicle acts as though it is in Neutral before suddenly engaging again. The condition is intermittent and cannot be reliably reproduced on demand, which makes it especially dangerous and unpredictable. I am concerned about losing propulsion while merging, passing, entering traffic, or attempting to accelerate away from another vehicle at highway speeds. The vehicle has previously had transmission adaptive learning/reset procedures performed, but the problem continues. I am aware that Ford/Lincoln has issued technical service information addressing momentary neutral-out, delayed engagement, harsh engagement, and other 10R80 transmission concerns on this generation of Navigator. I am also aware of Ford recall 26S48 / NHTSA recall 26V402 involving certain 2018–2021 Lincoln Navigators. I am not claiming that the recall is definitively the cause of my specific condition, but I believe this intermittent loss of propulsion presents a serious safety concern that should be investigated. I am requesting that NHTSA document and investigate this loss-of-propulsion / neutral-out condition because the vehicle can unexpectedly fail to accelerate and then violently re-engage the transmission while in motion.

My screen intermittently goes black, I have had it repaired/ updated once prior and it still does this..as a result I backed into a mailbox. It was very dark and I couldn’t see out of my windows.

I purchased this 2021 Lincoln Navigator L Black Label used on March 22, 2024 with approximately 42,726mi. Beginning around Sept. 2025 (approximately 70,000-75,000 miles), the vehicle developed intermittent transmission failures that have progressively worsened. This is our primary family vehicle and routinely transports our three young children. The transmission hesitates, slips, skips gears, bangs into gear, and frequently delays engagement before suddenly surging forward. Engine RPM increases without corresponding acceleration. Occupants are abruptly thrown forward and backward during normal driving. Several times each month, a yellow wrench/powertrain warning appears instructing the driver to see the owner’s manual. When this occurs, the vehicle loses normal acceleration and throttle response becomes significantly delayed. The defect is intermittent and unpredictable. The condition creates dangerous situations when merging, entering intersections, accelerating from traffic lights, and in stop-and-go traffic. On one occasion, after stopping on an incline, the vehicle would not accelerate and effectively became disabled in traffic. We activated our hazard flashers while vehicles drove around us. The hesitation followed by sudden engagement also creates a rear-end collision risk. I first brought the vehicle to an independent repair shop, but the concern was dismissed. On 6/22/2026, Herb Chambers Lincoln of Norwood road tested the vehicle, confirmed the complaint, and documented that the “transmission is skipping and banging into gears” and recommended complete transmission replacement. The estimated repair cost was approximately $12,560. The vehicle remains unsafe to drive due to repeated loss of propulsion, delayed acceleration, violent shifting, and dealer-confirmed transmission failure. I respectfully request NHTSA investigate whether this represents a broader safety defect affecting Ford/Lincoln vehicles equipped with the 10-speed automatic transmission.

The contact owns a 2021 Lincoln Navigator. The contact received notification of NTHSA Campaign Number: 25V455000 (Fuel System, Gasoline); however, the part to do the recall repair was not yet available. The local dealer was contacted. The dealer confirmed that the part was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact stated that vehicle failed to accelerate as needed due to a lack of fuel going to the engine. The contact stated that that the engine seized with the check engine warning light illuminated. The failure mileage was approximately 70,300.

The contact owns a 2021 Lincoln Navigator. The contact received notification of NHTSA Campaign Number: 25V455000 (FUEL SYSTEM, GASOLINE); however, the part to do the recall repair was unavailable. The local dealer was contacted, and it was confirmed that the part was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure.

The contact owns a 2021 Lincoln Navigator. The contact received notification of NHTSA Campaign Number: 25V455000 (Fuel System, Gasoline); however, the part to do the recall repair was not yet available. The dealer was not contacted. The contact stated that the recall was initiated for more than a year; however, the part to do the recall repair was still unavailable. The manufacturer was not contacted. The contact had not experienced a failure.

THE REAR LIGHT BAR DEVELOPS LEAKS AND CAN MAKE THE REAR LIGHING GO OUT. DEALER WAS MADE AWARE AND STATES IT'S NO LONGER A COVERED ITEM.

While driving, the vehicle repeatedly hesitated during gear changes, lost power, and then abruptly jerked back into gear. This occurred intermittently for over a month without any warning messages, creating unpredictable and unsafe driving conditions. As the issue worsened, the vehicle began losing power more frequently. The most serious event occurred at highway speed, where the vehicle suddenly lost propulsion in the middle of active traffic, nearly causing a stall. This created an immediate safety hazard for myself and surrounding drivers. After several seconds, the vehicle violently re-engaged into gear and surged forward. Only at this point did the vehicle display a warning: “Powertrain Malfunction / Reduced Power.” I scanned the vehicle and retrieved DTC P0734 – Gear 4 Incorrect Ratio, a code associated with internal transmission faults. A dealership inspected the vehicle and reported that the CDF drum had failed. They stated they could not guarantee that replacing the drum would resolve all issues and provided two estimates: $5,600 for a partial internal repair/$8,700 for full transmission replacement. The 10R80 transmission has a documented history of failures, including harsh shifting, slipping, unexpected gear disengagement, and internal component defects. These issues are addressed in multiple Ford Technical Service Bulletins involving P0734, harsh/failed shifts, and failures related to the CDF clutch cylinder/drum. Many vehicles of the same make and model are covered under related recalls or service actions for similar problems; however, my VIN is not included, and Lincoln declined to honor the existing recall. This defect presents a serious safety risk due to: Sudden loss of power while driving, including at highway speeds, Unpredictable re-engagement and violent surging, Loss of propulsion without warning, leading to near-stall conditions. This powertrain malfunction is a known, unsafe, repeat issue among these vehicles equipped w/this transmission.

I am reporting a serious safety concern involving a 2021 Lincoln Navigator with factory equipment only. After snowfall, during factory remote start, the vehicle produced a hot/burning smell, and I observed visible melting and bubbling of multiple driver-side and passenger side exterior pillars. The vehicle has a factory sunroof and no aftermarket electronics or modifications. The melting appears on the exterior, indicating heat originating from inside the pillar cavities. Due to concern for electrical overheating and fire risk, I discontinued using my remote start. A Lincoln dealership dismissed the concern and incorrectly stated that there is no electrical wiring in the pillars. Lincoln Customer Care has verbally refused assistance solely due to lack of extended warranty and has declined escalation, despite the reported fire risk. I am concerned this involves water intrusion from the sunroof drainage system contacting powered body or airbag wiring, creating a risk of electrical fire. I am requesting NHTSA review this as a potential safety defect involving electrical overheating and fire risk.

Navigator transmission goes into neutral when accelerating at speeds of 50+. Trans completely overhauled. Still does it. Almost had 2 accidents when changing lanes on the freeway, trying to accelerate and instead slowing down with cars behind fast approaching . When trying to pass on a 2-lane hwy, this would be deadly.

The contact owns a 2021 Lincoln Navigator. The contact stated that while the vehicle was parked, several attempts were needed to start the vehicle. The contact also stated that while driving at an undisclosed speed, the vehicle was shaking abnormally. There was no warning light illuminated. The contact received notification of NHTSA Campaign Number: 25V455000 (Fuel System, Gasoline). The vehicle was taken to the dealer, where it was not diagnosed or repaired. The dealer confirmed that parts were not yet available. The manufacturer was not made aware of the failure. The failure mileage was not available.

I am the owner of a 2021 Lincoln Navigator black label, currently subject to Safety Recall 25S75 concerning the low-pressure fuel pump that can cause engine stalling and increased crash risk. Ford’s recall filing and public reports make clear the hazard and that a remedy is still being developed. My vehicle has repeatedly exhibited hesitation and loss of acceleration consistent with the recall since I purchased the car in 2021. While driving on the highway with my 10 year old daughter and her friend home from soccer on 495 last Monday 9/29, I tried to pass a car by switching to the left lane and stepped on the accelerator.  The car hesitated, and felt like it was going to cease altogether for a moment, however the accelerator did finally « catch » and I was able to pass the car.  I have had this same sensation while pressing my foot on the accelerator though at low speeds on backroads.  After the incident last Monday I had the car towed to the Lincoln dealer so they could assess the car.  I have been told that the oil was very low. The oil light or check engine light was never on, and it has gone on previously when I’ve been due for an oil change. I’ve been told that the tires also need to be rotated. The dealer who serviced the car said that the car is driving great now and is safe to drive and can be delivered to me or I can pick up. I called Lincoln corporate Friday 10/3/25 and a case was opened and called back on Monday and spoke with a representative who said that there was nothing she could do if the dealer is saying that the car is safe to drive.  I don’t feel safe driving the car with this open safety defect unrepaired. A loaner to use while the process for repurchase of the car would be appreciated, but is being denied while they continue the process of good faith eval /consideration of repurchase of the car.

Car stalls often. Was not able to go through intersection. Held up traffic. Another incident was I was almost rear ended when car lost power. This is dangerous and not just an inconvenience.

They recalled other models for back up camera navigation issues. My vehicle was having same issue and I paid for repair and update on this issue and mine isn’t part of this recall but should be

Car purchased in Feb 2022. November 9, 2023 after a couple of previous complaints about the car riding rough, this time , after telling them the car jumps and throws into the next lane, it was diagnosed as having passenger rear leaking strut, front pinion seal leak, front driveshaft c/v joint torn and leaking grease. These were repaired under warranty. Dec 2024: had noise and had vibration felt through floorboard - diagnosed with problem in front differential and found carrier bearing failure and damage to case from bearing failure/spun. The axle housing assembly was replaced. April 2025: transmission shifting hard and clunk noise as well as riding rough again. These transmission assembly will be repaired for known problems on original 10 speeds but they don’t fix until customer complains, the rear differential pinion seal is leaking and the front struts are leaking. Something is very wrong with the suspension, drive train and transmission in this vehicle.

LINCOLN HAS NOT PROVIDED THE OWNERS MANUAL ADDENDUM AS DESCRIBED IN THIS RECALL.

[XXX] Wednesday we were traveling from Charlotte NC headed westbound on [XXX], a 6 or 8 lane highway, speed limit 70+ mph, when our 2021 Lincoln Navigator suddenly lurched and the engine completely failed. There weren't any warnings by the vehicle prior to the incident. There were two of us in the vehicle at the time, and we suddenly found ourselves in a situation of extreme risk. It was 4 - 5 pm during rush hour traffic. The driver was able to maintain composure and our tires continued rotating long enough to coast and cross over 3 fast moving lanes to get us slightly off the side of the highway. It was a very frightening and unsafe situation, not only during but after the engine failure, as we were on a very busy, noisy highway not knowing where we were or what to do. We live in Ohio and our plans were scheduled only for 8/25/24 (leave Ohio)-8/29/24 (return to Ohio). Our Lincoln was towed the night of the engine failure to Classic Ford Lincoln in Shelby NC, and it's been there for 7 days. The tow driver could not start the engine. He had difficulty (20 minutes trying) getting it into neutral so he could put it on the flatbed. The total engine failure problem isn't yet diagnosed. Classic is the only one to examine it. We had to extend our NC hotel stay for two days waiting for the vehicle to be repaired. On 8/31 we couldn't wait any longer and had to rent a vehicle from Enterprise to return home; leaving our Navigator in NC. Lincoln Roadside Assistance has been very difficult and inattentive to our dire circumstances. We're now faced with a situation of not having our vehicle, not having a diagnosis, and concerns about whether the vehicle will be dependable when/if it's returned to us. We have to travel often and fear Lincoln could leave us in bad circumstances again even if they can find the current problem and repair it. It seems to be something extraordinary or uncommon or a diagnosis would have happened by now. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

A grinding noise was noticed during the driver memory function or when manually adjusting the power tilt or telescoping steering column. I took the car to Ford for service and was very surprised to hear that the entire steering column needs to be replaced at the cost of $1700.00. This defect is ONLY covered under the limited warranty. This is obviously a safety hazard if it requires a new motor in the steering column. Upon a quick investigation of the defect, it was learned that this is a KNOWN problem on all Navigators from 2018-2021. Ford KNOWS that this defect exists on certain vehicles and has not issued a recall to correct this. This is not a normal "wear and tear" item that should have anything to do with your warranty. Very dangerous to need a new steering column motor for something that was known by FORD and LINCOLN to have problems in certain production years. Plus $1700.00 is a huge cost for the consumer.

Panoramic sunroof exploded without anything striking it. Sound like a gun shot. No vehicles in front of us to have thrown any objects at it to strike it.

The contact owns a 2021 Lincoln Navigator. The contact received notification of NHTSA Campaign Number: 23V598000 (Back Over Prevention) however, the part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had experienced a failure. The contact was in reverse (R) and backing up at approximately 2 MPH into her garage when the camera failed she crashed into the side of the garage entrance with the outer edge of the left rear bumper. The contact stated that the damage was minor and there were scratches on the left rear bumper edge only. The failure mileage was approximately 19,700. VIN tool confirms parts not yet available.

When first first entering a hot cabin, the backup camera will not work until the cabin cools down for just a few minutes. Vehicle not moving. ⁸

Passenger windshield wiper arm flew off while driving vehicle in moderate rainy weather.

I was driving about 40 miles per hour on an open road when I heard a very loud popping/explosion sound and falling glass. I immediately pulled over and found my panoramic sunroof had exploded and the glass was dropping into the cabin, most of it being caught by the interior sunroof screen. I immediately drove it to the Lincoln dealer where I bought it. They said they have never heard of such a thing as an exploding sunroof, and said it must have been a projectile hitting the top of my car; I find this highly improbable. Also, the pictures they took (attached to this report) are consistent with other pictures found online related to exploding sunroofs. The dealer also said that all glass is not warrantable, therefore, there was nothing they could do. I also called Ford Motor Company who originally said there might be something they can do to cover the cost. After discussing with the local Lincoln dealer, and internally, they wrote back that there was nothing they could do. They also declined to answer if this has been a recurring issue and our request to make a formal incident report to Ford. Although no one was hurt in this incident, had I been driving my children with the sunroof screen open (which we often to) at the time of this incident, they would have have tempered glass fall down on them, and potentially in their eyes.

Passenger whipper arm is loose especially when you lift the arm to clear snow from the windshield it will not align it its original location without multiple attempts.

The contact owns a 2021 Lincoln Navigator. The contact stated that while operating the vehicle, the power steering suddenly malfunctioned causing the steering wheel to become very difficult the turn in either direction. Additionally, the instrument panel display became distorted and unreadable, the brake light remained illuminated, and the vehicle would not properly accelerate. The vehicle was taken to the local dealer, but the cause of the failure was not yet determined. The manufacturer was not yet notified of the failure. The failure mileage was 19,000.

The contact owns a 2021 Lincoln Navigator. The contact received notification of NHTSA Campaign Number: 22V346000 (Engine) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

The contact owns a 2021 Lincoln Navigator. The contact received notification for NHTSA Campaign Number: 22V346000 (Engine) however, the part to do the recall repair was unavailable. The dealer was contacted after receiving the recall notification and the contact was informed that parts were not available because the cause of the defect was not yet determined. The contact was then notified that the recall had been divided into two separate recalls requiring two different repairs to fix the vehicle. The contact scheduled an appointment with the dealer for a routine maintenance check; while at the dealer, she was informed that there was still no resolution to the recall. Once the contact picked up her vehicle, she was informed that the recall was serviced. The contact was informed that the ground wires connected to the battery and cooling systems were shrink wrapped which she would prevent the under-hood fire failure. The contact expressed concerns with the dealer, noting that the plastic shrink wrapping would melt under a hot engine and would not resolve the recall. The contact made multiple attempts to reach the manufacturer but had no success. The contact had not experienced a failure. Parts distribution disconnect.

Urgent safety recall. Informed of this urgent safety recall of fires on May 17 and there still has been no resolution by Lincoln to fix this urgent safety issue.

The contact owns a 2021 Lincoln Navigator. The contact received notification of NHTSA Campaign Number: 22V346000 (Engine) and 22V250000 (Visibility) however, the part to do the recall repairs was unavailable. The local dealer was contacted and it was confirmed that parts were not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.

The contact owns a 2021 Lincoln Navigator. The contact received notification of NHTSA campaign numbers: 22V250000 (Visibility) and 22V346000 (Engine) however, the parts to do the recall repairs were unavailable. The local dealer was contacted and it was confirmed that parts were not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repairs. The manufacturer was not made aware of the issue. The contact stated that the driver’s side windshield wiper experienced the failure listed in 22V250000 (Visibility). The failure mileage was unknown. VIN tool confirms parts not available.

The contact owns a 2021 Lincoln Navigator. The contact received notification of NHTSA Campaign Number: 22V346000 (Engine) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.

Within one week of delivery of this new vehicle, the transmission began slipping out of gear and the car loses power for 30-40 seconds in the middle of driving. Shift System Fault, Transmission failure, and PowerTrain Malfunction are the errors coming up on the screen- even after the vehicle was in Service for 2 weeks and they replaced the transmission valve system. Very dangerous to completely lose power on the highway.