2018 Lincoln Navigator

The 2018 Lincoln Navigator marked a significant redesign for the nameplate, offering a blend of luxury and capability. It was exclusively offered with a 3.5-liter twin-turbocharged EcoBoost V6 engine producing 450 horsepower and 510 lb-ft of torque, paired with a 10-speed automatic transmission. Owners often praised the Navigator for its spacious and well-appointed interior, smooth ride, and powerful engine. Common complaints included issues with the infotainment system, some mechanical problems, and higher-than-average fuel consumption.

Engine

3.5L EcoBoost V6

• Turbocharger Failure
  • Description/Symptoms: Whining noises from the engine, loss of power, check engine light illumination. Some owners have reported premature turbocharger failure.
  • Solution: Replacing the failed turbocharger(s).
  • Estimated Cost to Fix: $2,000 - $4,000+
• Coolant Intrusion
  • Description/Symptoms: Some EcoBoost engines have experienced coolant intrusion. This is when coolant leaks into the combustion chamber.
  • Solution: Repairing the cylinder head or replacement of the engine.
  • Estimated Cost to Fix: $1,000 - $7,000+
• Vacuum Pump Failure
  • Description/Symptoms: The vacuum pump assists with the braking system. Signs that the pump is failing are stiff brakes, difficulty stopping, or a warning light.
  • Solution: Replacement of the vacuum pump.
  • Estimated Cost to Fix: $500-$1,000+

Transmission

10-Speed Automatic

• Harsh Shifting/Hesitation
  • Description/Symptoms: Some owners have reported harsh or erratic shifting, particularly between lower gears. Hesitation during acceleration is also a complaint.
  • Solution: Software recalibration of the transmission control module (TCM). In some cases, valve body replacement or complete transmission replacement may be necessary.
  • Estimated Cost to Fix: $100 - $500+ for software updates; $1,500 - $6,000+ for component replacement.

Suspension

• Air Suspension Issues
  • Description/Symptoms: The Navigator uses an air suspension system to provide a smooth ride. Problems can include compressor failure, air leaks in the lines or air springs, and the vehicle sagging or sitting unevenly.
  • Solution: Replacing the compressor, leaking air springs, or faulty lines.
  • Estimated Cost to Fix: $800 - $2,000+ per component.

Electrical

• Infotainment System (SYNC 3) Freezing/Crashing
  • Description/Symptoms: The SYNC 3 infotainment system can sometimes freeze, become unresponsive, or crash.
  • Solution: Software updates can sometimes resolve the issue. In other cases, replacement of the APIM (Accessory Protocol Interface Module) is needed.
  • Estimated Cost to Fix: $0 (for software update) - $1,000+ for APIM replacement.
• Battery Drain
  • Description/Symptoms: Premature battery drain, especially if the vehicle sits for extended periods.
  • Solution: Diagnosis to identify parasitic draw, replacement of faulty modules or components causing the drain, or replacement of the battery.
  • Estimated Cost to Fix: $100 - $1,000+ depending on the source of the drain.

Exterior

• Power Running Board Malfunction
  • Description/Symptoms: The power running boards may fail to extend or retract properly, or become stuck in one position.
  • Solution: Lubricating the joints and hinges. Repairing or replacing the motor, sensors, or the entire running board assembly.
  • Estimated Cost to Fix: $100 - $1,500+

Interior

• Seat Motor Failure
  • Description/Symptoms: Power seats failing to adjust.
  • Solution: Replacing the seat motor or control module.
  • Estimated Cost to Fix: $300 - $800+
• Sunroof Issues
  • Description/Symptoms: Sunroof fails to open or close, makes unusual noises, or leaks.
  • Solution: Cleaning and lubricating the tracks, replacing the motor, or replacing the entire sunroof assembly.
  • Estimated Cost to Fix: $100 - $1,500+

Recalls:

• 19V749000
• 19V881000
• 18V536000
• 18V765000
• 19V028000
• 18V669000

Summary:

The 2018 Lincoln Navigator, while praised for its luxury and performance, has exhibited several common issues. The engine and transmission can experience costly problems. Electrical and suspension issues are also common, potentially leading to inconvenience and expense. The severity and cost of repairs vary significantly, with some issues being relatively minor software glitches while others involve major mechanical failures that can cost several thousand dollars to repair.