Lincoln Navigator loss of power problems

Filed Oct 8, 2026 · Brakes · DE

Brakes failed while driving. I could not stop. Thank goodness I didn’t run anyone over. First time it happened I had it towed to the dealership- they said they fixed the problem. These are the warnings I got during the loss of my brakes the 2nd time: Antilock Brake Fault Yesterday at 8:22 PM Anti-lock Brake System Fault Yesterday at 8:22 PM Pre-Collision Assist Not Available Yesterday at 8:22 PM Powertrain Malfunction / Reduced Power Yesterday at 8:22 PM Electronic Parking Brake Yesterday at 8:22 PM Powertrain Malfunction / Reduced. There was no warning that this would happen. Second time was very terrifying as I was on the beltway.

Filed Jun 30, 2026 · Transmission · 170,000 miles · FL

The contact owns a 2018 Lincoln Navigator. The contact stated that while driving at 70 MPH, the transmission seized, and the vehicle failed to accelerate. The contact stated that several unknown warning lights were illuminated during the failure. Additionally, the brake warning light was illuminated, and the message “Loss of Power” was displayed. The failure was a recurring failure. The contact associated the failure with the federal safety agency Campaign Number: 26V402000 (Power Train). The dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 170,000.

Filed May 11, 2026 · Engine · NV

While operating my 2013 Lincoln Navigator under normal driving conditions, a spark plug ejected from the cylinder head, causing immediate and catastrophic engine failure. The engine lost power and began producing severe mechanical noise, creating a potential safety hazard due to sudden loss of propulsion. Inspection by both an independent mechanic and an authorized Ford dealership confirmed that the spark plug ejection allowed debris to enter the combustion chamber, destroying internal engine components. The vehicle was properly maintained and this failure occurred without warning. This issue appears consistent with known problems involving the Ford 5.4L Triton engine design. Ford Motor Company has refused to escalate or investigate the failure despite documentation. Ford Motor Company Customer Relationship Center P.O. Box 6248 Dearborn, MI 48126 Re: Goodwill Assistance Request & Notice of Latent Defect Vehicle: 2013 Lincoln Navigator – 5.4L Triton V8 VIN: [XXX] Case Number: To Whom It May Concern, I am the original purchaser and continuous owner of a 2013 Lincoln Navigator equipped with the 5.4L Triton engine. For more than three decades I have exclusively owned Ford and Lincoln vehicles, including multiple Lincoln Navigators, Ford Expeditions, and Ford trucks — all purchased new. I also still own a 1991 Ford Mustang 5.0 GT Convertible acquired new in 1992 and a 1999 Ford pickup currently exceeding 350,000 miles. My history reflects long-standing brand loyalty and confidence in Ford durability. This Navigator has been properly maintained throughout its life. Oil changes were performed approximately every 3,000 miles by both independent mechanics and authorized service facilities. The vehicle currently has approximately 140,000 miles and remains in exceptional cosmetic and interior condition. The vehicle has never been used for towing or severe duty. While operating under normal driving conditions, the check engine light illuminated and the engine imme INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATIO

Filed May 4, 2026 · Transmission · OR

2020 Lincoln Navigator, 10R80 transmission. Following two full transmission replacements, torque converter replacement, valve body replacement, and transmission pump repair, vehicle continues to exhibit hesitation under acceleration, harsh and delayed shifting, loss of power, shaking beginning at approximately 28-30 mph felt through the floorboard, and abnormal fuel consumption. Independent tire shop ruled out tires as cause. Safety Recall O1 for PCM reprogramming remains incomplete on this VIN despite multiple service visits. Vehicle has been at dealership since early-March with no confirmed repair date or Ford engineer visit scheduled

Filed Apr 28, 2026 · Transmission · TX

The vehicle is a 2019 Lincoln Navigator. The component that failed is the transmission. The vehicle experienced a sudden transmission failure resulting in loss of normal drivability. The issue is currently available for inspection at the repair facility upon request. This failure created a safety concern due to loss of power, hesitation, and unreliable shifting, which can increase the risk of collision, particularly in traffic or during acceleration. The problem has been confirmed by the dealership and independent repair facilities. Multiple repair professionals indicated that this failure is consistent with a known issue addressed by a Ford Technical Service Bulletin (TSB), suggesting this is not an isolated incident. The vehicle has been inspected by the repair facility. The manufacturer has not directly inspected the vehicle to my knowledge. There were no significant prior warning indicators that would suggest imminent failure. Any symptoms prior to failure were minimal or not clearly indicative of a major transmission issue. Based on information from repair facilities, this appears to be a known defect pattern rather than normal wear or maintenance-related failure. The use of a TSB instead of a recall raises concerns that a broader safety-related defect may not be adequately addressed. This failure occurred after proper maintenance and outside any initial waiting period for warranty coverage. The issue appears systemic and warrants further investigation.

Filed Apr 13, 2026 · Transmission · IL

While driving on highway on several occasions, transmission jumps out to neutral causing sudden loss of power specially when accelerating. This was rarely happening since 2022 but it started to get worse recently happening more than four times in 2026

Filed Apr 6, 2026 · Transmission · CO

After 3 failed diagnoses with various vehicle repair shops that could not fix our problem, we took our 2019 Lincoln Navigator to the Phil Long Ford/Lincoln dealership 26 days ago. After expressing my concerns about our vehicle jerking into gear and intermittently losing accelerator power during driving, the dealership diagnosed it as a problem with the cam phasers. Upon picking up the vehicle and asking the CSR if a test drive had been done multiple times beforehand, we arrived, paid our bill, and took the vehicle for less than 30 seconds before realizing the same issue was persisting. My wife and child are the primary occupants at most times, and losing power on the highway and on side roads is most concerning. As of two weeks ago today, I was called by the CSR at Phil Long Ford to let me know that calls and reports were made to Lincoln specifically and that the General Managers would be pooling money together to find a resolution and eventually fix my vehicle. The CSR also said that by the following day (Tues), I would know about a resolution. 2 weeks later (today), I called and requested a manager call me to discuss the situation. No call was made. I also reached out to the CSR and was told that my case was still in a holding pattern. We have now had to rent a vehicle 3 times to help us get around, with no assistance from the dealership except for 2 out of the 26 days we've been without a vehicle. After doing more digging, there is a large class action lawsuit in motion that covers exactly what we are going through. As of 8 days ago, Ford's request to dismiss the suit was denied. We believe at this time there is gross negligence by Ford & Lincoln and have first hand accounts of how scary these vehicles can become while on the road. To top it off during my visit to the dealership this evening, the service manager gave me two options when asking about a possible loaner or rental vehicle: approve the repairs needed on my own dime or continue driving the vehicle.

Filed Mar 9, 2026 · Electrical, Engine · VA

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.

Filed Feb 10, 2026 · Acceleration, Engine · TX

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.

Filed Jan 2, 2026 · Engine · TX

While driving at approximately 65-70 mph on a major interstate, the engine experienced a sudden catastrophic failure without warning. This caused an immediate loss of power and power steering/braking assist, making the vehicle extremely difficult to control in high speed traffic. This sudden stall endangered my life and the lives of nearby motorists. A certified mechanic inspected the engine internals (via borescope) and identified that a valve seat had dropped in the #4 cylinder, causing it to impact and destroy the piston. This 'dropped valve seat' failure is a known defect in Ford/Lincoln 5.4L engines. It occurred despite my meticulous maintenance history and constitutes a latent manufacturing defect that creates an unreasonable safety risk on public highways.