The 2003 Town & Country is a solid family hauler let down by a notoriously fragile 41TE/A604 automatic transmission and intake manifold gasket failures on the 3.3L/3.8L V6s. Most that survive past 150k miles have already had major drivetrain work.
41TE/A604 Automatic Transmission Failure
Common · high severityTypical onset: 80,000-140,000 mi
Symptoms: Harsh 2-3 shift or slipping between gears, Delayed engagement into Drive or Reverse, Limp mode with transmission fault codes (P0700, P0740, P0841), Burnt ATF smell or dark red fluid
Fix: Full rebuild or replacement required. The solenoid pack and overdrive clutches are primary failure points. Rebuild takes 12-16 hours including removal/installation. Many shops won't touch these—recommend a reman unit with warranty.
Estimated cost: $2,800-4,200
Intake Manifold Gasket Failure (Plenum Gasket)
Common · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Rough idle and stumbling acceleration, Check engine light with lean codes (P0171, P0174), Whistling or hissing sound from engine bay, Poor fuel economy and hesitation under load
Fix: Replace upper and lower intake gaskets. Upper plenum gasket is the usual culprit—it's a cheap plastic-composite that deteriorates. Job requires removing upper intake plenum, 4-5 hours labor. Always replace EGR tube gasket and PCV valve while you're in there.
Estimated cost: $450-750
Transmission Oil Cooler Line Corrosion
Common · high severityTypical onset: 90,000-150,000 mi
Symptoms: ATF leaking near radiator or under vehicle, Transmission overheating warnings, Pink fluid mixing with coolant (internal radiator leak), Low transmission fluid on dipstick
Fix: Steel lines rust through at frame crossmember contact points, especially in salt states. If the internal radiator cooler fails, you get the 'strawberry milkshake of death'—coolant mixes with ATF and kills the transmission. Replace both cooler lines and external filter, 2-3 hours. If radiator is compromised, budget a full trans flush or rebuild.
Estimated cost: $350-600 (lines only), $3,500-5,000 (if trans contaminated)
Engine Mount and Transmission Mount Failure
Common · medium severityTypical onset: 70,000-120,000 mi
Symptoms: Clunking when shifting from Park to Drive, Excessive vibration at idle, Visible engine movement during acceleration, Shifter feels loose or notchy
Fix: Front engine mount and rear transmission mount are hydraulic-filled and collapse internally. Right-side mount also common. Each mount is 1.5-2 hours; most techs do all three at once for 4-5 hours total. Dramatically improves NVH if original mounts still in place.
Estimated cost: $500-850
Power Steering Pump and Rack Leaks
Occasional · medium severityTypical onset: 100,000-160,000 mi
Symptoms: Whining noise during turns, especially when cold, Power steering fluid leak at pump or rack boots, Heavy steering effort intermittently, Burnt power steering fluid smell
Fix: Pump bearings wear and seals leak on high-mileage units. Rack pinion seals also seep. Pump replacement is 2 hours, rack is 4-5 hours. Flush system with fresh ATF+4 after any component replacement to prevent premature failure of new parts.
Estimated cost: $350-550 (pump), $700-1,100 (rack)
Radiator and Heater Core Failure
Occasional · medium severityTypical onset: 110,000-180,000 mi
Symptoms: Coolant leaking from radiator end tanks (plastic), Sweet smell inside cabin with foggy windshield (heater core), Overheating in traffic or highway, Coolant loss with no visible external leak
Fix: Plastic end tanks crack on radiator. Heater core clogs or leaks, requiring full dash removal (8-10 hours labor). If doing heater core, replace evaporator and blend door actuators at same time. Radiator is straightforward, 2 hours.
Estimated cost: $300-500 (radiator), $900-1,400 (heater core)
ABS Pump Module Failure
Occasional · high severityTypical onset: 120,000+ mi
Symptoms: ABS and brake warning lights illuminated, Pulsing brake pedal during normal stops, Codes C2204 or C121C (pump motor circuit), Hard brake pedal with reduced assist
Fix: Internal motor or valve body corrosion in ABS module. Replacement requires bleeding entire system, 2-3 hours. Dorman reman units available but OE Bosch preferred. Module is under hood on driver side frame rail.
Estimated cost: $800-1,400
Buy only if transmission has been rebuilt with receipts and all cooling system components are fresh—otherwise you're inheriting a $4,000 repair bill within 20k 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.