The 2014 Expedition uses Ford's proven 5.4L Triton 3V V8, but this generation suffers from catastrophic engine failures due to cam phaser and timing chain issues, plus transmission cooler failures that can destroy the 6R80 transmission if coolant mixes with ATF.
Cam Phaser and Timing Chain Failure Leading to Engine Destruction
Common · high severityTypical onset: 80,000-150,000 mi
Symptoms: Loud rattling on cold starts that goes away after warmup, Check engine light with cam position codes (P0340-P0349), Loss of power and rough idle, Catastrophic failure: metal shavings in oil, complete engine seizure
Fix: Cam phasers require front engine teardown (timing cover off), but once metal contaminates the oil system, you're looking at short block replacement or full rebuild. 25-35 hours labor for full engine rebuild, 18-22 hours for short block swap.
Estimated cost: $6,500-12,000
Transmission Oil Cooler Internal Leak (Coolant-to-ATF Cross-Contamination)
Common · high severityTypical onset: 70,000-120,000 mi
Symptoms: Transmission fluid looks milky or strawberry-colored, Hard or delayed shifts, Transmission overheating warning, Coolant level dropping with no external leaks, Complete transmission failure if not caught early
Fix: Requires transmission removal, complete fluid system flush, cooler replacement in radiator, and often transmission rebuild if contamination went undetected. 8-12 hours for cooler and flush if caught early, 20-25 hours if transmission is damaged.
Estimated cost: $1,800-6,500
Spark Plug Ejection from Cylinder Head
Occasional · high severityTypical onset: 60,000-100,000 mi
Symptoms: Sudden loud popping or hissing sound from engine, Severe misfire on one cylinder, Loss of compression, Rough idle and lack of power
Fix: The 3-valve Triton heads have inadequate thread engagement. Requires HeliCoil or TimeSert thread repair kit. 3-5 hours labor per plug if caught immediately. If damage is severe, cylinder head removal and machining required (12-16 hours).
Estimated cost: $800-3,500
Rear Differential Pinion Seal Leak
Common · low severityTypical onset: 60,000-110,000 mi
Symptoms: Gear oil dripping from front of rear differential, Oil spots on driveway behind vehicle, Whining noise from rear end if fluid gets too low
Fix: Pinion seal replacement requires driveshaft removal, pinion nut removal, and proper preload reset with inch-pound torque wrench. 2-3 hours labor.
Estimated cost: $400-700
Transmission Mount Failure
Common · medium severityTypical onset: 80,000-130,000 mi
Symptoms: Clunking when shifting from Park to Drive/Reverse, Excessive vibration at idle, Visible transmission sag when inspected on lift
Fix: Transmission must be supported from below while mount is replaced. The heavy 6R80 in these trucks accelerates mount wear. 2-3 hours labor.
Estimated cost: $350-600
Fuel Pump Driver Module Failure
Occasional · medium severityTypical onset: 90,000-140,000 mi
Symptoms: No-start condition, cranks but won't fire, Intermittent stalling while driving, Loss of fuel pressure, Check engine light with fuel system codes
Fix: Module is mounted to frame rail above spare tire. Requires dropping spare and cleaning electrical connections. 1.5-2 hours labor.
Estimated cost: $400-700
Power Running Board Motor and Track Failure
Common · low severityTypical onset: 50,000-90,000 mi
Symptoms: Running boards won't deploy or retract, Grinding or clicking noise from board motors, Boards stuck in extended position, One side works, other doesn't
Fix: Motors and tracks get contaminated with road salt and debris. Individual motor replacement 1-1.5 hours per side. Full track assembly if drive mechanism is stripped: 2-3 hours per side.
Estimated cost: $500-1,200
Avoid unless you're getting a smoking deal and have $3,000-5,000 set aside for inevitable cam phaser or transmission cooler work — the 5.4L 3V in this generation is a ticking time bomb past 100k miles.
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.