Other Fuel System Problems of Lincoln Navigator

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.

See all problems of the 2021 Lincoln Navigator 🔎.

Problem is when you go to check the oil do you think you’re gonna find a low oil situation and what happens is the oil is actually overfilled however it’s not overfilled because you put too much oil in it. It’s overfilled because gasoline is leaking into the oil pan. So the oil is diluted and it actually doesn’t even seem like oil. It seems like dirty gas. That’s how much gas gets into it. Supposedly this is a known issue after searching it on the internet, this is known, and it happens with this making my vehicle. The manufacturer should be responsible for fixing it. Supposedly the fix is either changing the fuel pump or fixing the valves or maybe a combination of both either way the consumer should not be stuck with this. This is a design error or defect. It says there’s also a problem with the gasket I feel I should not have to pay to get this fixed. This is a designed defect and they sold the car this way knowing afterwards that there’s an issue with it. My crank case is filled with gas when I pull the dipstick out. It drips like water. If you look at the full line on the dipstick it’s about 1 inch over the full line and the oil is virtually useless. The car also runs an idles rough and it’s constantly idling up and idling down and that’s probably because the gas is leaking into the engine. Please look into this and I appreciate anything you can do. This is definitely a Ford issue. They should be responsible there’s nothing I did to this particles this problem. I maintained my vehicles. I did everything I was supposed to do and this problem arose because it’s defect in the car quite frankly if I would’ve known it, there’s no way I would’ve bought it. I feel the public should know about this and I feel that they should be responsible to fix it. Thank you very much. I appreciate all your help in time. Please feel free to contact me if you have any questions thank you [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2017 Lincoln Navigator 🔎.

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.

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.

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.

The throttle body went bad while driving 55mph and 35mph. Over 5 times I could not accelerate while stepping on the gas peddle and it would stall out trying to get it to Ford on the same road for 5 miles. I had to quickly stop and turn it back on with my flashers going less than 35mp on a 55mph road. This happened at first going around a corner you can not stop on due to no visual on the other side which would cause a wreck stopping there. The problem was confirmed by coughlin of heath Ford and they were the ones that fixed it. There was no warning of the throttle body going bad until it happened at that moment and repeated to happen as I tried to get it to Ford on the same road it was happening on into town. The check engine light did come on but it it would go on and off during the situation until it finally stayed on after a few minutes. There is a photo of the report attached to this document.

Vehicle is subject to multiple open federal safety recalls with no repair remedy currently available from Ford/Lincoln. One recall involves potential fuel pump failure causing loss of fuel pressure, engine stall while driving, and increased crash risk. A second recall involves interruption of driver assistance and visibility systems including rearview camera, forward collision warning, lane keeping, and related safety systems. This vehicle is operated in a commercial passenger rental fleet. Due to federal rental vehicle recall compliance requirements, the vehicle was removed from rental service immediately after issuance of the recalls and cannot legally be rented until repaired. Ford/Lincoln currently has no available repair remedy despite the recalls having been active for an extended period of time. The lack of available remedy has rendered the vehicle commercially unusable for an extended period while continuing to create ongoing safety concerns related to engine stall and interruption of critical driver assistance systems. The vehicle remains unavailable for lawful commercial operation pending manufacturer remedy.

See all problems of the 2022 Lincoln Navigator 🔎.

I’m a snowbird and in the past 18 months, of which I was in iowa for 12 months of this time, the dealership has replaced the fuel pump five times. I’m scared to take this vehicle out on the highway. The module that controls the fuel pump has been replaced once. The third replacement I didn’t even get off the dealers lot before it quit.

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. Https://youtu. Be/i_ej_ohwzr4?si=jvslru2d7cszxx78.

See all problems of the 2018 Lincoln Navigator 🔎.

Fuel gauge says zero miles to empty and will not take any gas more than a few gallons before kicking pump off. Gauge shows it's over heating but if you turn ignition off and turn right back on it resets and is fine. Codes come back saying nothing about fuel or cooling, but only something about speed control in the hub. Sounds like an electrical issue but no where to be found.

See all problems of the 2006 Lincoln Navigator 🔎.

Engine temperature warning light came on. Engine coolant leaked out. Engine die while we were waiting for help on the side of I-15 freeway. The vehicle is now at Lincoln dealership for repair. They also told me that there is a faulty fuel pump code that they are looking at. They told me that the factory did not place a water hose in the properly designed placement. The truck die at about 500 miles after taking delivery from the dealer on 6/23/22 evening. It was tow from baker to henderson on 6/26/22.

Takata recall. At a slow speed, with the foot on the brake, vehicle accelerates. Speed is generally under 10 mph and has happened during turning. . . Either left or right. Specifically: it happened once turning left into a parking spot; it happened making a slow right hand turn on a street; it happened again during a left hand turn into a parking garage. We took it to a shop and the mechanic drove it. It happened to him as well, but I don't have the specifics for the one incident, but he also experienced the brakes not engaging normally to the point where he had to push extremely hard on the brake to stop the vehicle. The vehicle is still with the mechanic. I'm not sure if he's finding the exact cause of the problem. The master cylinder has been replace so far, but 3 of the 5 or 6 incidents occurred afterwards. We did contact the local Lincoln dealership service department and they told us they have never heard of a similar incident. We just purchased the vehicle second hand and have only owned it for 2 weeks. It started the day after purchase. It's dangerous and we don't know where to turn since we bought the vehicle "as is". Will follow up with the mechanic tomorrow, 05/13/2019.

See all problems of the 2007 Lincoln Navigator 🔎.

Was driving car shut off. . . Bought new battery instantly, then replaced crankshaft sensor because after car shutoff it wouldnt start back up. . .

My 2007 Lincoln Navigator may need rail cross-over hose because it contains weak areas. The hose may crack, which could cause a fuel odor and/or fuel leak. This is what I'm smelling outside of my truck.

Lugnuts/fuel leaking/lighting/seatbelts.

See all problems of the 1999 Lincoln Navigator 🔎.

Tl- the contact owns a 2006 Lincoln Navigator. The contact stated that while the vehicle was stopped, the contact smelled burning rubber and plastic as the vehicle began smoking from both the front driver and passenger side and caught fire. The fire department was not called and the contact extinguished the fire. There were no injuries. The vehicle was towed to bayway Lincoln 12333 gulf fwy, houston, TX 77034 where it was diagnosed that the fuel and brake lines had overheated and caught fire. The vehicle was not repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 68,000. Np.

Engine surged causing vehicle to propel forward hitting the vehicle in front of me. There was significant damage to my car and less damage to the truck that I hit. I was in a carpool line at my child's school where it is not uncommon for pedestrians to walk in front of vehicles sitting in line. If this had been the case there would have been a serious injury/death.

See all problems of the 2015 Lincoln Navigator 🔎.

Lincoln Navigator vehicles equipped with 5. 4l engines. The fuel rail cross-over hose may contain weak areas. As a result, the hose may crack, which could cause a fuel odor and/or fuel leak.

Engine starts to knock an shake very loudly while coming to a complete stop from simply driving 45mph or it completely lloses all power as I'm driving an a loud poppig explosions coming from the exhuast an they are loud enough were people hehhave pulled up next to me to let me know an afraid the car may blow up. Air suspension dose not come on when it's cold an drives very poorly an misleading to other drivers an law enforcement since I've been pulled over for possible dui because the car is all over the place an jumpy. The radio cuts in an out as I drive, the cruise control doesn't work. I've taken it to 3 different mechanics they all say the same thing take it to the dealer because they can't seem to figure it out. So I took it to galpin Lincoln in van nuys, CA on roscoe blvd an sepulveda an they just found one fuel injector needing replaced an wanted me to $2,500 for labor alone to completely open up my engine an see if it could possibly be the timing chain an realine the camshafts but they are not certain that's actually the problem with my Navigator because they can completely do all that an come up to be fine an be something else but unless I pay $2,500 for labor to just see if it is an have the chance it could not be I still lose those $2,500 because it's a non refundable. Where am I going to come up with that kind of money not alone why am I having to pay that first to see if it's a maybe the reason of all my car problems. Honestly that is ridiculous an not going to pay that kind of money on a maybe answer not a 100 percent we are sure that's the problem. Something needs to give an heaven forbid my car does blow up with my son's in the car driving it just because I needed to pay that amount on a maybe answer is un called for.

See all problems of the 2005 Lincoln Navigator 🔎.

Unexplained acceleration without warning.

Has happened a few times recently twice in one week. Driving and my truck shuts off,steering locks up and no power. The warning indicator tells me. "check throttle computer system,I shut off truck and after a couple times it starts back up. . .

My 2002 Lincoln Navigator ejected a spark plug causing a substantial repair bill.

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Second time the spark plug blew out of the triton 54 head. . Trained tec performed it the first time sert install and worked fine. He didn't touch the factory plugs on the other cylinders. But those blew out this is a Ford design error and flaw but they refuse to acknowledge it. Instead they rather blame the techs and the customer.

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Spark plug explosion on cylinder #3 in my 1998 Ford 5. 4l v8.

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2002 Lincoln Navigator caught fire while parked in my driveway and burnt to the ground.

The vehicle is not able to be drove.