The 2022 Navigator shares the 3.5L EcoBoost twin-turbo V6 and 10-speed automatic with the Expedition, inheriting both its strong towing capability and its carbon buildup tendencies. Being so new, catastrophic failures are rare but early-production electrical gremlins and transmission cooler issues appear disproportionately.
Transmission Oil Cooler Line Leaks and Contamination
Occasional · high severityTypical onset: 20,000-60,000 mi
Symptoms: Transmission fluid leaking near radiator or underneath vehicle, Harsh shifting or delayed engagement after starting, Pink or milky fluid in coolant overflow tank indicating cross-contamination
Fix: Replace transmission oil cooler and lines, flush both transmission and cooling system if contamination occurred. 4-6 hours labor if caught early; if coolant mixed into transmission, add another 8-10 hours for full trans flush/rebuild
Estimated cost: $1,200-$3,500
Direct-Injection Carbon Buildup on Intake Valves
Common · medium severityTypical onset: 50,000-80,000 mi
Symptoms: Rough idle or misfires at cold start, Loss of power under acceleration, especially when towing, Check engine light with multiple misfire codes (P0300-P0306)
Fix: Walnut-blasting or manual cleaning of intake valves. Remove intake manifold, 6-8 hours labor for thorough job on both banks
Estimated cost: $800-$1,400
Integrated Trailer Brake Controller Faults (NHTSA Recalls)
Occasional · high severitySymptoms: Trailer brake controller error messages on dash, Trailer brakes not activating or locking up unexpectedly, Complete loss of trailer brake function while towing
Fix: Software reflash at dealer or module replacement if hardware failure. Covered under recall 22V-805, 23V-284, and 23V-612. 1-2 hours if just software, 3-4 hours if module replacement needed
Estimated cost: $0-$1,200
10-Speed Transmission Adaptive Learning Issues and Harsh Shifts
Common · medium severityTypical onset: 10,000-50,000 mi
Symptoms: Hard downshifts from 3rd to 2nd or 2nd to 1st when slowing, Hunting between gears on highway (9th-10th), Occasional clunk when shifting into drive from park
Fix: Start with TSB updates and adaptive learning reset (1 hour). If mechanical, solenoid pack replacement or valve body work required, 8-12 hours with trans still in vehicle
Estimated cost: $200-$2,800
Turbocharger Wastegate Rattle and Actuator Failure
Occasional · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Rattling sound from engine bay at idle or light throttle, Reduced boost pressure and sluggish acceleration, Check engine light with underboost codes (P0299, P0234)
Fix: Replace wastegate actuator or entire turbocharger if wastegate is seized. 6-8 hours per side, both turbos often need attention within 10k miles of each other
Estimated cost: $1,800-$3,500
Phaser and Timing Chain Stretch (Early Wear)
Rare · high severityTypical onset: 80,000-120,000 mi
Symptoms: Cold-start rattle lasting 3-5 seconds from front of engine, Check engine light with cam/crank correlation codes (P0016, P0017, P0018), Rough running or no-start if chain skips teeth
Fix: Replace cam phasers, timing chains, guides, and tensioners on both banks. Engine-out recommended for thorough job: 20-30 hours labor
Estimated cost: $5,500-$8,500
Too new to call reliability proven — wait another 2-3 years for high-mileage data, or buy CPO with extended warranty to cover the EcoBoost's known weak points.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.