The 2014 Taurus on the D4 platform pairs solid ergonomics with troublesome powertrains—particularly the 3.5L EcoBoost which grenades internals when carbon buildup meets poor maintenance, and a chronic transmission cooler leak that can destroy the 6F transmission if ignored.
Transmission Oil Cooler Internal Leak (6F50/6F55 trans)
Common · high severityTypical onset: 60,000-100,000 mi
Symptoms: Transmission slipping or shuddering, Milky pink transmission fluid, Coolant in trans or trans fluid in coolant, Overheating transmission, Check engine light with transmission codes
Fix: The internal trans cooler in the radiator corrodes and cross-contaminates coolant with ATF, destroying clutch packs. Requires radiator replacement, full transmission flush (sometimes twice), and fluid/filter service. If caught late, full transmission rebuild or replacement needed. Labor 3-6 hours for cooler/flush, 12-18 hours if transmission damaged.
Estimated cost: $800-1,200 if caught early; $3,500-5,500 with transmission rebuild
3.5L EcoBoost Carbon Buildup and Piston Ring Failure
Occasional · high severityTypical onset: 80,000-130,000 mi
Symptoms: Excessive oil consumption (quart every 500-1,000 mi), Misfires on multiple cylinders, Blue smoke from exhaust on startup, Loss of power under boost, Fuel smell in oil
Fix: Direct injection creates carbon on intake valves; combined with short trips or poor oil change intervals, piston rings stick or fail. Often requires short block replacement or full engine rebuild with new pistons, rings, and machine work on cylinders. Walnut blasting valves adds $500-800 if rebuilding. Labor 18-25 hours for short block swap.
Estimated cost: $5,500-8,500
2.0L EcoBoost Head Gasket and Block Porosity
Occasional · high severityTypical onset: 70,000-110,000 mi
Symptoms: Coolant loss with no visible leaks, White smoke from exhaust, Overheating especially under load, Rough idle when cold, Coolant in cylinders 1 or 4
Fix: The 2.0L suffers from porous blocks allowing coolant intrusion and head gasket failure between cylinders and coolant passages. Requires cylinder head removal, resurfacing, new gasket, and block inspection. If block is porous, needs replacement or engine swap. Labor 12-16 hours for head gasket; 18-22 hours if block replacement needed.
Estimated cost: $2,200-3,500 for head gasket; $4,500-6,500 with block issues
Power Transfer Unit (PTU) Leak and Failure (AWD models)
Common · medium severityTypical onset: 50,000-90,000 mi
Symptoms: Fluid leak at front of transmission, Whining or grinding noise during acceleration, Vibration at highway speeds, Binding feeling in tight turns, AWD malfunction warning
Fix: PTU seals leak, owners ignore it, unit runs dry and destroys itself. Ford maintenance schedule has no PTU service interval which accelerates failure. Requires PTU replacement or rebuild, plus rear differential service if metal contamination spread. Labor 4-6 hours.
Estimated cost: $1,200-2,000
Water Pump Failure (3.5L EcoBoost)
Occasional · high severityTypical onset: 60,000-100,000 mi
Symptoms: Coolant leak from timing cover area, Grinding or rattling from front of engine, Overheating, Sweet coolant smell, Steam from engine bay
Fix: Internal water pump driven by timing chain fails—either seal leak or bearing failure. Requires timing cover removal, new water pump, timing chain inspection, and cooling system flush. If bearing grenades, metal contaminates cooling system requiring full flush and possible radiator replacement. Labor 6-8 hours.
Estimated cost: $1,400-2,200
Rear Axle Shaft Seal and Bearing Failure (recalled but not comprehensive)
Occasional · medium severityTypical onset: 40,000-80,000 mi
Symptoms: Clunking from rear on acceleration or deceleration, Humming or growling that changes with speed, Gear oil leak at wheel hub, Vibration at highway speed, Axle play when wheels jacked up
Fix: Axle shaft bearings fail prematurely; NHTSA recall 14V340 covered some but not all cases. Requires axle shaft removal, new bearing, seal, and sometimes hub assembly. Both sides should be done simultaneously. Labor 3-5 hours for both sides.
Estimated cost: $600-1,000
Transmission Mounts Collapsing
Common · low severityTypical onset: 50,000-90,000 mi
Symptoms: Clunk when shifting from Park to Drive/Reverse, Vibration at idle in gear, Excessive engine movement visible when accelerating, Transmission shifting feels harsher
Fix: Hydraulic transmission mounts collapse from age and fluid loss, allowing excessive powertrain movement. Requires mount replacement—usually the rear transmission mount fails first. Labor 1.5-2.5 hours.
Estimated cost: $250-450
Pass unless you find a naturally-aspirated 3.5L V6 model with documented PTU services and a new radiator—the EcoBoost engines and transmission cooler issues make this a money pit after 80k 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.