2006 LAND ROVER DISCOVERY

Typical onset: 60,000-120,000 mi

Symptoms: Coolant loss with no visible leaks, White smoke on startup, Rough idle and misfires, Overheating despite new thermostat/water pump, Coolant in oil or oil in coolant

Fix: This is THE killer issue. The aluminum block uses Nikasil-coated liner sleeves that can slip or crack, allowing coolant into cylinders. Requires complete engine rebuild with machined block and proper liner installation (40-60 hours), or short block replacement (30-45 hours). Many shops won't touch it—requires specialist with proper tooling. Used engines are gambles since they likely have same defect dormant.

Estimated cost: $8,000-15,000

Typical onset: 70,000-110,000 mi

Symptoms: Temperature gauge climbing into red, Coolant reservoir boiling over, Heater blowing cold intermittently, Reduced power under load

Fix: Often starts with failed water pump (plastic impeller disintegrates), then thermostat housing cracks, then radiator end tanks split. Many owners chase individual parts only to have next component fail weeks later because overheating damaged everything. Smart move is replacing water pump, thermostat with housing, upper/lower hoses, and radiator simultaneously (8-12 hours). If already overheated badly, see liner slippage above.

Estimated cost: $2,000-3,500

Typical onset: 80,000-130,000 mi

Symptoms: Transmission fluid leak at radiator area, Burnt transmission fluid smell, Harsh shifting or slipping, Milky transmission fluid (if cooler fails internally)

Fix: Steel lines rust through or rubber sections crack where they route near exhaust. External leak is messy but manageable (2-3 hours to replace lines). Internal cooler failure is catastrophic—coolant mixes with ATF, destroying transmission. Requires new cooler, transmission flush or rebuild depending on contamination (15-25 hours for full trans rebuild if internal failure).

Estimated cost: $400-800 for lines, $4,000-6,500 if transmission damaged

Typical onset: 90,000-140,000 mi

Symptoms: Vehicle sits low at one corner or all around, Suspension fault warning on dash, Compressor runs constantly, Hissing sound from wheel wells

Fix: Air springs develop leaks at folds or mounting points; compressor overworks and burns out. Single bag replacement is 2-3 hours per corner. Compressor replacement is 3-4 hours. Smart owners replace all four bags preventively when one fails since others are same age. Can convert to coil springs ($1,500-2,000) but loses off-road capability and towing capacity.

Estimated cost: $800-1,200 per bag, $1,200-1,800 for compressor

Typical onset: 100,000-150,000 mi

Symptoms: Clunking when shifting into drive, Vibration at highway speeds, Whining or grinding from center of vehicle, Fluid puddle under center of truck

Fix: The chain-driven transfer case develops slack over time, especially if fluid changes were skipped. Seal leaks at output shaft are common. Fluid change with quality oil every 30k helps prevent wear (1.5 hours). Chain replacement requires case disassembly (8-12 hours). Complete rebuilt unit is often more cost-effective than internal rebuild at indie shops.

Estimated cost: $400-600 for seals and fluid, $2,500-4,000 for chain/internals

Typical onset: 75,000-125,000 mi

Symptoms: Hard starting when hot, Rough running and hesitation, Check engine light with fuel trim codes, Fuel smell in cabin or under vehicle

Fix: Fuel filter housing (plastic) cracks at seams causing pressure loss and vapor lock. High-pressure fuel pump can fail causing lean conditions. Filter housing replacement is 2-3 hours but requires relieving fuel pressure safely. Pump replacement adds another 3-4 hours as tank must be dropped. Both issues are often misdiagnosed as MAF or throttle body problems first.

Estimated cost: $600-1,000 for filter housing, $1,200-1,800 for pump