The 2006 LX 470 is built on Toyota's bulletproof Land Cruiser platform with the 2UZ-FE V8, known for exceptional longevity when maintained. However, age-related issues around cooling, drivetrain mounts, and transmission thermal management are the Achilles' heels on high-mileage examples.
Transmission Oil Cooler Line Failure and Radiator Cross-Contamination
Common · high severityTypical onset: 120,000-180,000 mi
Symptoms: Pink or milky transmission fluid (coolant mixing), Transmission slipping or delayed engagement, Coolant loss with no external leaks, Transmission failure after coolant enters the ATF system
Fix: Replace transmission oil cooler lines, flush both cooling system and transmission completely. If contamination occurred, transmission rebuild is often necessary due to clutch pack damage. Preventive line replacement: 3-4 hours. Full repair with trans rebuild: 18-22 hours.
Estimated cost: $800-1,200 preventive, $4,500-6,500 with transmission rebuild
Transmission Mount Deterioration
Common · medium severityTypical onset: 100,000-150,000 mi
Symptoms: Clunk or thud on acceleration or deceleration, Excessive drivetrain movement visible when shifting between Drive and Reverse, Vibration at idle in gear
Fix: Replace rear transmission mount (most common failure point). Requires lifting transmission slightly for access. 2-3 hours labor.
Estimated cost: $400-650
Secondary Air Injection System Failure (P0441, P0446 Codes)
Occasional · low severityTypical onset: 100,000-160,000 mi
Symptoms: Check engine light with emissions codes, Air pump noise on cold start (when working) or silence (when failed), Emissions test failure in strict states
Fix: Air injection pump, check valves, or vacuum switching valve fail. Pump replacement is most common. Does not affect driveability. 2-3 hours labor.
Estimated cost: $600-1,100
Heater T-Valve and HVAC Actuator Failures
Occasional · low severityTypical onset: 120,000-170,000 mi
Symptoms: No heat or weak heat output, Coolant leak under dashboard on passenger side, Clicking noise from dashboard when adjusting temperature, One side blows hot, other side cold
Fix: Heater control valve (T-valve) leaks internally or externally. Blend door actuators fail electrically. T-valve: 1.5-2 hours. Actuators require partial dash removal: 3-5 hours depending on which one.
Estimated cost: $350-500 for T-valve, $600-900 for actuators
Lower Ball Joint Wear
Common · high severityTypical onset: 80,000-130,000 mi
Symptoms: Clunking over bumps from front suspension, Wandering or loose steering feel, Uneven tire wear on inside edge, Failed inspection for excessive play
Fix: Lower ball joints wear faster than uppers due to vehicle weight and off-road use. Replaced with entire lower control arm assembly (ball joint not serviceable separately on most aftermarket options). Both sides typically done together. 4-5 hours labor plus alignment.
Estimated cost: $1,200-1,800 for both sides
Throttle Body Carbon Buildup and Idle Issues
Occasional · low severityTypical onset: 90,000-150,000 mi
Symptoms: Rough idle or idle surge, Hesitation on initial throttle tip-in, Check engine light with P0505 (idle control), High idle that won't drop
Fix: Electronic throttle body accumulates carbon deposits. Requires removal, cleaning, and throttle relearn procedure. 1.5-2 hours labor.
Estimated cost: $250-400
Starter Motor Failure
Occasional · medium severityTypical onset: 130,000-200,000 mi
Symptoms: Click or rapid clicking when turning key, Intermittent no-start that resolves after multiple attempts, Grinding noise during start attempt, Complete no-crank condition
Fix: Starter solenoid contacts or motor brushes wear out. Replacement requires access from underneath, removal of skid plate. Remanufactured starters common. 2-2.5 hours labor.
Estimated cost: $500-800
Buy one with full service records under 150k miles — the drivetrain will outlast the frame if you stay ahead of the transmission cooler lines and routine fluids.
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.