2007 SUBARU LEGACY GT

Typical onset: 60,000-120,000 mi

Symptoms: Whistling or grinding noise from turbo at boost, Blue smoke on deceleration, Loss of power and boost pressure, Check engine light with underboost codes (P0035, P0243)

Fix: The turbo oil feed banjo bolt has a tiny internal screen filter that clogs with sludge, starving the turbo bearings. Requires turbo removal to inspect damage; if caught early you replace the banjo bolt and filter (~1 hour). If turbo is damaged, replacement is 4-6 hours. OEM or quality aftermarket turbo required. Many techs delete the screens preventively during oil changes.

Estimated cost: $150-400 for banjo bolt service, $1,800-3,200 for turbo replacement with gaskets and fluids

Typical onset: 80,000-140,000 mi

Symptoms: External oil seepage at head/block joint, visible on engine sides, White smoke from exhaust on cold start, Coolant loss with no visible leaks, Overheating or fluctuating temp gauge, Milky oil on dipstick or cap (internal failure)

Fix: The EJ255 uses multi-layer steel head gaskets that fail externally more often than internally. External leaks start as seepage and progress to drips. Requires engine removal or extreme contortion to do in-chassis; most shops pull the engine. Plan 16-20 hours labor for both sides, includes resurfacing heads, new timing components, water pump, and all gaskets. Always do both sides simultaneously.

Estimated cost: $2,500-4,200 depending on machine shop costs and whether you upgrade to OEM+ gaskets

Typical onset: 50,000-90,000 mi

Symptoms: Loud clunk when shifting from reverse to drive or vice versa, Excessive drivetrain movement felt through shifter, Vibration at idle in gear, Visible engine/trans sag when inspecting from below

Fix: The rear transmission crossmember mount is a fluid-filled unit that tears internally. Pitch stopper (dog bone mount) also fails frequently. Both are accessible from below with the car on a lift. Rear trans mount is 1.5 hours, pitch stopper is 0.8 hours. Replace both at once since labor overlaps and failure rates are similar.

Estimated cost: $350-600 for both mounts with quality aftermarket parts

Symptoms: Transmission fluid dripping near radiator or on subframe, Low transmission fluid level causing harsh shifts or slipping, Visible rust or green crusty corrosion on steel cooler lines

Fix: The steel transmission cooler lines that run to the radiator corrode through in salt-belt states, causing sudden massive ATF loss. Lines run underneath and require removal of skid plates and exhaust heat shields. Replacement is 2-3 hours with proper line bending tools. Some techs replace with braided stainless aftermarket lines for longevity. Catching this before a line bursts prevents transmission damage from running dry.

Estimated cost: $400-700 for OEM lines, slightly more for stainless upgrades

Typical onset: 90,000-150,000 mi

Symptoms: Check engine light with cam/crank correlation codes (P0011, P0021), Rough idle or stalling when warm, Rattling noise from cam covers on cold start, Reduced power and poor fuel economy

Fix: The AVCS (Active Valve Control System) solenoids fail or get clogged with sludge, causing timing faults. Solenoids alone are 1.5 hours to replace both sides. However, the cam sprockets themselves can have internal screen filters clog or the actuator pistons stick. If codes persist after solenoid replacement, expect cam cover removal and possible sprocket replacement (adds 4-6 hours). Use quality oil and 3,000-mile intervals to prevent this.

Estimated cost: $400-700 for solenoids only, $1,200-1,800 if cam sprockets and screens need service

Typical onset: 70,000-110,000 mi

Symptoms: Growling or humming noise that increases with speed, Noise changes pitch during turns (louder turning one direction), Vibration felt through steering wheel or seat, ABS or traction control light if bearing has failed severely

Fix: Subaru wheel bearings are hub assemblies that fail more frequently than competitors, especially in AWD models with higher loads. Front bearings are 2 hours each, rears are 1.5 hours each due to easier access. These are not rebuildable — full hub assembly replacement required. Use OEM or premium aftermarket (NSK, Timken); cheap eBay bearings fail within 20,000 miles.

Estimated cost: $350-500 per corner with quality parts