2004 LEXUS LX 470

Typical onset: 80,000-150,000 mi

Symptoms: Clunking over bumps that progresses to severe play, Tire wear on inside edge, Complete separation can occur without warning — wheel folds under vehicle

Fix: Replace both lower control arms (ball joints not serviceable separately on many years). Some attempt press-in aftermarket joints, but OEM arms are the reliable fix. 3-4 hours labor for both sides.

Estimated cost: $800-1,400

Typical onset: 120,000-180,000 mi

Symptoms: P0441, P0446, P1441, P1443 codes (EVAP/AIR system), Rough cold start, clacking noise first 30 seconds, Excessive oil consumption (1 qt per 1,000 mi or worse), Blue smoke on deceleration or cold start

Fix: The air injection pump and one-way valve fail, allowing exhaust gases into intake. This cokes up piston rings causing blow-by and oil consumption. Early catch: replace air pump, valve, and clean carbon ($1,200-1,800, 4-6 hours). Ignored too long: piston ring damage leads to scored cylinders requiring full rebuild or short block. Rebuild is 25-35 hours labor.

Estimated cost: $1,200-1,800 caught early / $8,000-14,000 full rebuild

Typical onset: 100,000-160,000 mi

Symptoms: ATF drips or puddles under engine bay, driver side, Low transmission fluid without visible external leak (cooler line leaking into radiator), Pink milkshake in radiator if cooler ruptures internally — catastrophic for transmission

Fix: Steel lines rust through where they connect to radiator. Replace both feed and return lines, sometimes requires radiator removal for access. If cooler failed internally and ATF mixed with coolant, transmission needs full flush or rebuild. 2-4 hours for lines only.

Estimated cost: $600-1,200 for lines / $3,500-5,500 if trans contaminated

Typical onset: 120,000-200,000 mi

Symptoms: Oil drips from bellhousing area onto crossmember, Oil visible on back of engine block or transmission case, Gradual oil loss, 1-2 quarts between changes

Fix: Rear main seal requires transmission removal (8-10 hours). Valley plate gasket (between cylinder banks) less common but requires upper intake removal (6-8 hours). Often done together if trans is already out.

Estimated cost: $1,800-2,800

Typical onset: 90,000-150,000 mi

Symptoms: AHC warning light on dash, Vehicle sits low on one corner or entire front/rear, Suspension feels bouncy or wallows in turns, Hydraulic fluid leak visible at shock/strut actuators

Fix: Hydraulic actuators, pump, or accumulator fail. Can delete entire system and convert to standard coil springs and shocks (popular modification, 6-8 hours). Or replace failed components at significant cost (actuators are $800+ each).

Estimated cost: $1,200-2,000 for coil conversion / $2,500-4,500 OEM repair

Typical onset: 90,000 mi intervals

Symptoms: No symptoms until catastrophic failure, Belt shreds, engine stops immediately, Interference engine — bent valves, piston damage if belt breaks

Fix: Non-negotiable 90k service. Timing belt, water pump, tensioner, idler pulleys, drive belts, thermostat. 6-8 hours labor. Skipping this service results in $6,000-10,000 valve job or worse.

Estimated cost: $1,200-1,800 preventive / $6,000-10,000 if belt fails

Typical onset: 100,000-180,000 mi

Symptoms: No-start when engine is hot (after short stop), Starts fine when cold, Clicking from starter area or no sound at all, May start after cooling 20-30 minutes

Fix: Starter solenoid contacts wear and fail to engage when heat-soaked. Replace starter assembly. Access is tight but doable from underneath, 2-3 hours.

Estimated cost: $600-1,000