2005 SUBARU LEGACY GT

Typical onset: 80,000-130,000 mi

Symptoms: white smoke from exhaust on cold start, coolant consumption without visible leaks, milky oil cap residue, overheating under load

Fix: Full head gasket replacement requires pulling both heads, resurfacing, new timing components, and quality MLS gaskets. Budget 18-24 hours labor. Many shops recommend doing timing belt, water pump, and all seals while you're in there.

Estimated cost: $2,800-4,200

Typical onset: 100,000-150,000 mi

Symptoms: blue smoke under boost, whining or grinding noise from engine bay, sudden loss of power, excessive oil consumption, check engine light with underboost codes

Fix: Turbo replacement on the EJ20Y requires removing the engine or dropping the subframe for access. OEM turbos are discontinued; expect aftermarket or used. 10-14 hours labor depending on shop approach.

Estimated cost: $2,200-3,800

Typical onset: 90,000-140,000 mi

Symptoms: harsh or delayed 2-3 shift, slipping between gears, transmission banging into gear from stop, flashing AT Temp light, limp mode with trans codes

Fix: The 5EAT valve body solenoids fail and contaminate the fluid. Full valve body replacement or rebuild required, trans must come out or be dropped. 8-12 hours labor. Fluid flush and external filter often not enough.

Estimated cost: $2,000-3,500

Symptoms: sudden turbo failure with no warning, catastrophic engine damage in severe cases, metal shavings in oil, turbo seized on inspection

Fix: The banjo bolt filter screens on turbo oil feed lines clog with debris, starving the turbo. Preventive replacement of banjo bolts with aftermarket filterless versions is 1 hour labor. If turbo is already damaged, see turbo replacement cost above.

Estimated cost: $150-300 (preventive), $2,500-5,000 (if engine damaged)

Typical onset: 105,000 mi (recommended interval)

Symptoms: engine won't start after belt breaks, valve-to-piston contact and bent valves, rough idle or misfires if belt jumps timing, squealing from engine bay if tensioner failing

Fix: EJ20Y is an interference engine—belt failure destroys valves. Timing belt service includes belt, tensioner, idlers, water pump, and front seals. 6-8 hours labor. If belt breaks, add head removal and valve replacement.

Estimated cost: $800-1,200 (preventive), $3,500-5,500 (after failure)

Typical onset: 70,000-110,000 mi

Symptoms: humming or growling noise from rear that increases with speed, noise changes with cornering load, ABS or traction control lights occasionally, wheel play on lift

Fix: Rear wheel bearing hubs fail earlier than most AWD Subarus due to the GT's higher torque and weight. Bearing is pressed into hub assembly. 2-3 hours per side including alignment check.

Estimated cost: $400-650 per side

Typical onset: 80,000-120,000 mi

Symptoms: clunking when shifting into drive or reverse, excessive engine movement visible under hood during acceleration, vibration at idle, harsh engagement

Fix: Rubber mounts deteriorate and oil-filled mounts leak. Pitch stop mount (dogbone) and rear trans mount are most common. Replace in pairs for balance. 2-3 hours labor for both.

Estimated cost: $350-600

Typical onset: 60,000-100,000 mi

Symptoms: loss of power under boost, hissing sound during acceleration, check engine light with underboost codes P0237 or P0238, turbo spooling but no power delivery

Fix: Rubber couplers crack and Y-pipe develops pinhole leaks. Inspect all intercooler piping and pressure-test system. Coupler replacement is 1-2 hours; Y-pipe replacement is 2-3 hours.

Estimated cost: $300-700