2004 TOYOTA LAND CRUISER

Typical onset: 100,000-180,000 mi

Symptoms: metallic knocking on cold start that quiets when warm, sudden catastrophic rod knock, oil consumption increase, metal shavings in oil

Fix: The hypereutectic pistons crack at the skirt, usually #7 cylinder first. Once knocking starts, you're on borrowed time. Full rebuild or short block replacement, 25-35 labor hours depending on shop experience with these engines. Many shops will swap in a used JDM low-mileage engine (15-18 hours) instead of rebuilding.

Estimated cost: $6,500-12,000

Typical onset: 80,000-150,000 mi

Symptoms: pink or milky fluid in coolant reservoir, transmission slipping or harsh shifts, coolant loss with no external leaks, transmission overheating

Fix: The factory transmission cooler inside the radiator fails and mixes coolant into ATF, which destroys the transmission if not caught early. Must replace radiator with aftermarket unit that has better separation, flush transmission completely, often replace transmission if driven after contamination. External trans cooler bypass is mandatory. If caught early (just radiator): 4-6 hours. If trans is damaged: add 12-18 hours for rebuild.

Estimated cost: $800-1,200 (radiator only), $3,500-5,500 (with trans rebuild)

Typical onset: 90,000-140,000 mi

Symptoms: coolant leak under dash on passenger side, wet carpet passenger floor, coolant smell in cabin, no heat or intermittent heat

Fix: The plastic heater control valve behind the glove box cracks and leaks. Requires dashboard disassembly to access. 6-8 labor hours due to dash removal. Replace with updated OEM part, not aftermarket which fails faster.

Estimated cost: $650-950

Typical onset: 80,000-120,000 mi

Symptoms: clunking over bumps, wandering steering, uneven tire wear on inside edge, play in wheel when jacked up

Fix: The lower ball joints wear and develop play. These are not serviceable separately on the 100-series, must replace entire lower control arm assembly per side. 3-4 hours for both sides with alignment. OEM Toyota arms or quality aftermarket only.

Estimated cost: $800-1,200

Typical onset: 100,000-160,000 mi

Symptoms: vehicle sits low on one corner, AHC warning light, hydraulic fluid puddles under vehicle, suspension feels bouncy or unresponsive

Fix: Active Height Control system develops leaks in struts, accumulators, or lines. Each strut is 4-5 hours, accumulator replacement 2-3 hours. Hydraulic fluid is expensive. Many owners convert to conventional coilovers (Ironman, OME) instead of repairing AHC, which runs 8-12 hours for full conversion.

Estimated cost: $1,200-1,800 per strut, $3,500-5,000 for full coilover conversion

Typical onset: 120,000-180,000 mi

Symptoms: intermittent no-crank, clicking sound when key turned, grinding noise on startup, starts after several attempts

Fix: The Denso starter motor wears out, usually the solenoid contacts or bushings. Access is tight from underneath, must remove skid plate. 2-3 labor hours. Use OEM Denso or quality rebuild, not cheap aftermarket.

Estimated cost: $450-700

Typical onset: null

Symptoms: center diff lock won't engage or disengage, flashing diff lock light, grinding when attempting to engage, stuck in locked mode

Fix: The electric actuator motor on the transfer case fails or the shift fork wears. Access requires transfer case drop or partial removal. 4-6 hours labor. If fork is worn, transfer case may need internal work adding significantly to cost.

Estimated cost: $600-1,000 (actuator), $1,500-2,500 (if fork/internal work needed)