NHTSA FEDERAL EVIDENCE AUDITAudited: 2026-08-25

2021 Lincoln Nautilus Common Problems & Defect Telemetry

Authoritative defect intelligence synthesized from 19 verified NHTSA owner complaints, 2 federal safety recalls, and interquartile failure mileage telemetry.

Data Grade: MEDIUM5 Odometer Verified EntriesMethodology
Executive AI Defect Summary

The 2021 Lincoln Nautilus receives a 7.4/10 MazicBay Reliability Index based on 19 verified NHTSA federal complaints and 2 safety recalls. The primary reported failure mode is Transmission Hesitation, Hard Shifting & Slipping Reports with a median failure point at 52,800 miles (IQR: 52,20053,400 mi). Out-of-warranty repairs benchmark at $1,400 – $3,800 .

2021 Lincoln NautilusLuxury2021
DLC Port: Under driver side steering column

*Representative vehicle platform imagery. Body styling varies across generations.

MazicBay Reliability Index
7.4 / 10

7.9 complaints / 10k sold

NHTSA Owner Complaints
19

Verified US federal records

Safety Severity Grade
Elevated Risk

Crash, fire & stall audit

Federal Safety Recalls
2

2 Active / Free Remedies

Switch Nautilus Model Year (2014–2025)
Defect Clustering

Top Reported Problem Clusters (7)

Ranked by NHTSA Complaint Frequency
#1 TRANSMISSION & DRIVETRAINMedium Severity83% Match Confidence

Transmission Hesitation, Hard Shifting & Slipping Reports

8
Federal Complaints
Failure Mileage (Median):52,800 milesIQR: 52,20053,400 mi
Estimated Repair Cost:$1,400 – $3,800 MazicBay Repair Intelligence Model
Recall Status:Out-of-Pocket / TSB RemedyNHTSA Campaign Audit
Reported Defect Symptoms
  • Hard gear shifts / delayed engagement into Drive/Reverse
  • Transmission shudder / jerking under acceleration
  • Transmission slipping between gears
Potentially Associated OBD-II Codes

Correlated via MazicBay Diagnostic Engine (not NHTSA verified fact).

Sample Verified NHTSA Evidence Records (3)
ODI #11748565 • Filed: 07/06/2026

The transmission occasionally jerks/studders between second and third at acceleration and deceleration.

ODI #11741378 • Filed: 06/01/2026

2021 Lincoln Nautilus Reserve 2.7-liter twin-turbocharged V6 with coolant intrusion caused by a blown head gasket on cylinder #6. Vehicle would not accelerate properly and lurch forward when the gas pedal was pressed over 25%. The issue was taken to the shop and not found. The...

ODI #11733835 • Filed: 04/26/2026

Vehicle died in parking lot. The electronics all worked, it just would not start and would not go into any gear. Had to have it towed to dealer for repair. They replaced the PCM but it still would not start. They again replaced the PCM and a fuse. The vehicle started. This is ...

#2 ENGINE & COOLINGMedium Severity78% Match Confidence

Engine Stalling, Oil Consumption & Cooling Defect Reports

7
Federal Complaints
Failure Mileage (Median):54,000 milesIQR: 54,00054,000 mi
Estimated Repair Cost:$950 – $3,200 MazicBay Repair Intelligence Model
Recall Status:Out-of-Pocket / TSB RemedyNHTSA Campaign Audit
Reported Defect Symptoms
  • Engine sudden stall / hesitation while driving
  • Abnormal oil burning / consumption
  • Check Engine Light (MIL) flashing
  • Engine overheating / coolant loss
Potentially Associated OBD-II Codes

Correlated via MazicBay Diagnostic Engine (not NHTSA verified fact).

Sample Verified NHTSA Evidence Records (3)
ODI #11754393 • Filed: 08/03/2026

The contact owns a 2021 Lincoln Nautilus. The contact stated that while the vehicle was at the dealer for an oil change and trade-in, the contact was informed that the front driver’s side door had a crack and that the welding was cracked and loosened. The vehicle was not repai...

ODI #11741378 • Filed: 06/01/2026

2021 Lincoln Nautilus Reserve 2.7-liter twin-turbocharged V6 with coolant intrusion caused by a blown head gasket on cylinder #6. Vehicle would not accelerate properly and lurch forward when the gas pedal was pressed over 25%. The issue was taken to the shop and not found. The...

ODI #11733835 • Filed: 04/26/2026

Vehicle died in parking lot. The electronics all worked, it just would not start and would not go into any gear. Had to have it towed to dealer for repair. They replaced the PCM but it still would not start. They again replaced the PCM and a fuse. The vehicle started. This is ...

#3 ELECTRICAL SYSTEM & BATTERYLow Severity85% Match Confidence

Electrical Parasitic Drain, Infotainment & Harness Reports

3
Federal Complaints
Failure Mileage (Median):54,000 milesIQR: 54,00054,000 mi
Estimated Repair Cost:$280 – $850 MazicBay Repair Intelligence Model
Recall Status:Out-of-Pocket / TSB RemedyNHTSA Campaign Audit
Reported Defect Symptoms
  • Unexplained battery drain after sitting overnight
  • Infotainment display / instrument cluster blackouts
  • Accessory malfunction / alternator fault warnings
Potentially Associated OBD-II Codes

Correlated via MazicBay Diagnostic Engine (not NHTSA verified fact).

Sample Verified NHTSA Evidence Records (3)
ODI #11733835 • Filed: 04/26/2026

Vehicle died in parking lot. The electronics all worked, it just would not start and would not go into any gear. Had to have it towed to dealer for repair. They replaced the PCM but it still would not start. They again replaced the PCM and a fuse. The vehicle started. This is ...

ODI #11660662 • Filed: 05/13/2025

Since 2023 there has been an ongoing issue with my vehicle. When Im in public parking lots and I am accessing the trunk. I’ve witnessed my trunk literally shutting down or closing as Im accessing the trunk. Ive recorded this safety concern and Ive reported it to the dealership...

ODI #11634165 • Filed: 01/05/2025Odometer: 54,000 mi

I bought the 2021Lincoln Nautilus in Aug 2024 with only 54000miles. I was leaving the dealership and driving home with my suv & noticed that the suv was slightly trembling. Since then, I realized that my vehicle would tremble once I put gas in it, and this would happen at any ...

#4 STEERING & SUSPENSIONLow Severity65% Match Confidence

Electric Power Steering Assist & Suspension Noise Reports

3
Federal Complaints
Failure Mileage (Median):55,000 milesIQR: 35,00075,000 mi
Estimated Repair Cost:$450 – $1,400 MazicBay Repair Intelligence Model
Recall Status:Out-of-Pocket / TSB RemedyNHTSA Campaign Audit
Reported Defect Symptoms
  • Sudden loss of electric power steering assist
  • Steering wheel pull or highway wander
  • Clunking / knocking noise over bumps
Potentially Associated OBD-II Codes

Correlated via MazicBay Diagnostic Engine (not NHTSA verified fact).

Sample Verified NHTSA Evidence Records (3)
ODI #11754393 • Filed: 08/03/2026

The contact owns a 2021 Lincoln Nautilus. The contact stated that while the vehicle was at the dealer for an oil change and trade-in, the contact was informed that the front driver’s side door had a crack and that the welding was cracked and loosened. The vehicle was not repai...

ODI #11712734 • Filed: 01/22/2026

The contact owns a 2021 Lincoln Nautilus. The contact stated that while opening the front driver’s door, there was a cracking sound coming from the door. While the vehicle was in for routine maintenance, the mechanic discovered that the front driver’s side door check arm stop ...

ODI #11642159 • Filed: 02/12/2025

Recall 24S55/24V635 was issued in October 2024, the issue with intake valves was discovered prior to October 2021. My car was manufactured in July 2021 within the time of inefficient intake valves. The problem continues to exist as there is no remedy. No remedy and no problem ...

#5 FUEL SYSTEM & INJECTIONLow Severity65% Match Confidence

Fuel Pump Pressure Loss & Fuel Delivery Defect Reports

1
Federal Complaints
Failure Mileage (Median):54,000 milesIQR: 54,00054,000 mi
Estimated Repair Cost:$650 – $1,250 MazicBay Repair Intelligence Model
Recall Status:Out-of-Pocket / TSB RemedyNHTSA Campaign Audit
Reported Defect Symptoms
  • Sudden loss of propulsion power at highway speeds
  • Extended engine cranking / failure to restart
  • Fuel odor near fuel tank / engine bay
Potentially Associated OBD-II Codes

Correlated via MazicBay Diagnostic Engine (not NHTSA verified fact).

Sample Verified NHTSA Evidence Records (1)
ODI #11634165 • Filed: 01/05/2025Odometer: 54,000 mi

I bought the 2021Lincoln Nautilus in Aug 2024 with only 54000miles. I was leaving the dealership and driving home with my suv & noticed that the suv was slightly trembling. Since then, I realized that my vehicle would tremble once I put gas in it, and this would happen at any ...

#6 BRAKING SYSTEM & ABSLow Severity65% Match Confidence

Service Brakes, ABS Actuator & Master Cylinder Reports

1
Federal Complaints
Failure Mileage (Median):55,000 milesIQR: 35,00075,000 mi
Estimated Repair Cost:$350 – $1,100 MazicBay Repair Intelligence Model
Recall Status:Out-of-Pocket / TSB RemedyNHTSA Campaign Audit
Reported Defect Symptoms
  • Spongy or hard brake pedal travel
  • ABS / Brake warning light illuminated
  • Extended stopping distance / pedal vibration
Potentially Associated OBD-II Codes

Correlated via MazicBay Diagnostic Engine (not NHTSA verified fact).

Sample Verified NHTSA Evidence Records (1)
ODI #11689898 • Filed: 09/26/2025

The contact owns a 2021 Lincoln Nautilus. The contact stated that while shifted to reverse(R) and depressing the accelerator pedal, the vehicle hesitated and then suddenly jerked backwards. The contact stated that the vehicle almost jumped into gear. The contact stated that la...

#7 AIRBAGS & SAFETY RESTRAINTSCritical Severity65% Match Confidence

Airbag Occupant Detection & Inflator Defect Reports

1
Federal Complaints
Failure Mileage (Median):55,000 milesIQR: 35,00075,000 mi
Estimated Repair Cost:$400 – $1,200 MazicBay Repair Intelligence Model
Recall Status:Under Investigation / Recall AuditNHTSA Campaign Audit
Reported Defect Symptoms
  • SRS Airbag warning lamp illuminated
  • Passenger occupant classification sensor failure
  • Seat belt retractor lockup
Potentially Associated OBD-II Codes

Correlated via MazicBay Diagnostic Engine (not NHTSA verified fact).

Sample Verified NHTSA Evidence Records (1)
ODI #11509293 • Filed: 02/27/2023

The contact owns a 2021 Lincoln Nautilus. The contact stated that while his wife was pulling into a parking space, the vehicle abruptly accelerated, crashing into the handicap pole sign. There were no injuries. No air bags were deployed. There was no police report filed. The v...

Safety Enforcement

Official NHTSA Safety Recalls (2)

100% Free Dealer Repair
NHTSA Campaign #24V635000Reported: 23/08/2024

ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL

Summary: Ford Motor Company (Ford) is recalling certain 2021-2022 Bronco, F-150, Edge, Explorer, Lincoln Nautilus, and Lincoln Aviator vehicles equipped with either a 2.7L or 3.0L Nano EcoBoost engine. The engine intake valves may break while driving, which can result in engine failure and a loss of drive power.

Safety Consequence: A loss of drive power increases the risk of a crash.
Manufacturer Remedy: Dealers will perform an engine cycle test and replace the engine as necessary, free of charge. Owner notification letters were mailed July 3, 2025. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 24S55.
NHTSA Campaign #25V315000Reported: 09/05/2025

BACK OVER PREVENTION:SOFTWARE

Summary: Ford Motor Company (Ford) is recalling certain 2021-2024 Bronco, F-150, 2021-2024 Edge, 2022-2025 Escape, F-250, F-350, F-450, F-550, F-600, 2022-2024 Expedition, 2022-2025 Transit, 2021-2023 Mach-E, 2024 Ranger, Mustang, 2021-2023 Lincoln Nautilus, 2022-2024 Navigator, and 2023-2024 Corsair vehicles. A software error may cause the rearview camera image to delay, freeze, or not display when the vehicle is in reverse.

Safety Consequence: A frozen or missing rearview camera image can reduce the driver's view behind the vehicle, increasing the risk of a crash.
Manufacturer Remedy: The accessory protocol interface module (APIM) software will be updated by a dealer or through an over-the-air update, free of charge. This will be a phased campaign, with the remedy becoming available in different phases based on model and model years. Interim letters notifying owners of the safety risk were mailed on June 26, 2025. Additional letters will be mailed once the final remedy is available on each phase. Owner notification letters were sent on October 8, 2025. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 25S49.

Pre-Purchase Inspection Checklist for 2021 Lincoln Nautilus

Before purchasing a used 2021 Lincoln Nautilus, perform the following targeted inspections based on reported federal defect patterns:

1. Cold Start & Idle Diagnostics

Scan the OBD-II port under the dash for pending freeze-frame codes (e.g. P0300 misfires, P0087 fuel rail pressure, P0420 catalytic efficiency).

2. Transmission Shift Quality Audit

Test vehicle at low-speed stop-and-go and highway merges. Check for delayed reverse engagement or gear shift shudder between 2nd and 3rd gears.

3. Federal Recall Completion Check

Verify that all 2 NHTSA safety recall campaigns have been performed by an authorized dealership using the VIN.

4. Electrical & Infotainment Drain Check

Ensure the instrument cluster, center screen, and auxiliary charging ports operate with stable 12.0V–14.4V alternator voltage.

Frequently Answered Questions

Defect & Reliability Q&A: 2021 Lincoln Nautilus

Is the 2021 Lincoln Nautilus a reliable used car?

The 2021 Lincoln Nautilus earns a 7.4/10 MazicBay Reliability Index based on 19 federal owner reports. Vehicles maintained under factory service schedules exhibit strong longevity past 150,000 miles.

What is the most frequent defect reported on the 2021 Lincoln Nautilus?

The leading complaint category is Transmission Hesitation, Hard Shifting & Slipping Reports, with a median failure point around 52,800 miles (IQR: 52,20053,400 mi).

Are there free recall repairs available for the 2021 Lincoln Nautilus?

Yes, the NHTSA records 2 safety recall campaign(s) for this model year. All safety recalls are performed 100% free of charge by authorized franchise dealerships regardless of vehicle warranty status.