2004 SUBARU OUTBACK

Typical onset: 80,000-150,000 mi

Symptoms: Oil or coolant weeping from cylinder head seam, visible as streaks down block, White residue around head gasket area, sweet coolant smell, Gradual coolant loss without visible external puddles, Overheating if leak progresses and coolant runs critically low, Eventually can lead to internal coolant-oil mixing if ignored long enough

Fix: Machine shop resurface both heads, replace timing belt/water pump/seals while in there, 16-20 hours labor. If overheating happened repeatedly, risk of warped heads requiring replacement (~$600-900 each) or damaged bearings requiring short block. OEM gaskets mandatory—aftermarket fails quickly.

Estimated cost: $2,200-3,500 if caught early; $4,500-7,000 if short block needed

Typical onset: 100,000-180,000 mi

Symptoms: Transmission fluid leaking from steel lines running to radiator, Rust perforation at bends or mounting points—salt-belt cars worst, Sudden large fluid loss leading to slipping, no forward gears, Brown puddle under front of car, distinct burnt ATF smell

Fix: Replace both cooler lines (they rust as a pair), often need radiator too if internal cooler contaminated trans fluid. If driven low on fluid, internal damage likely—valve body or full rebuild. 3-5 hours for lines alone, 15-25 if trans teardown needed.

Estimated cost: $400-800 for lines/radiator; $2,500-4,000 if transmission damaged

Typical onset: 90,000-140,000 mi

Symptoms: Growling or humming that increases with speed, often louder in turns, Usually rear, occasionally front—rear is non-serviceable hub assembly, ABS warning light if sensor damaged by bearing play

Fix: Replace hub assembly—bearings are pressed and sealed in. Rear is easier than front. 1.5-2.5 hours per side. OEM or quality aftermarket (Timken, NSK) required—cheap bearings fail in 20k miles.

Estimated cost: $300-500 per wheel

Typical onset: 120,000-200,000 mi

Symptoms: Check engine light with P0420 (catalyst efficiency below threshold), No drivability symptoms—just emissions failure, Oxygen sensor data shows front and rear sensors reading identical

Fix: Replace front catalytic converter (integrated with exhaust manifold on some—expensive). Verify O2 sensors aren't the cause first (less common). 2-3 hours labor. Aftermarket cats often fail emissions testing or throw codes again—OEM or high-end aftermarket only.

Estimated cost: $800-1,800 depending on OEM vs quality aftermarket

Typical onset: 80,000-130,000 mi

Symptoms: Clunking over bumps from front suspension, Steering wheel off-center after hitting potholes, Inner edge tire wear if alignment shifts from bushing slop

Fix: Replace both front lower control arms as assemblies—bushings are not sold separately in practical terms. 2-3 hours plus alignment. OEM lasts longer than aftermarket rubber.

Estimated cost: $500-800 including alignment

Symptoms: Recall notice in mail—no symptoms until deployment, Risk of abnormal airbag deployment in crash

Fix: Dealer recall repair—free. Check VIN at Subaru recall site. Takes 1-2 hours at dealer. Must be addressed before resale in many states.

Estimated cost: $0 (recall repair)

Typical onset: 100,000+ mi

Symptoms: Cruise control won't engage or disengages randomly, Throttle sticks slightly when cruise used—dangerous, Recall issued for some VINs—check NHTSA database

Fix: Inspect cable for rust or fraying—recall covers replacement if affected. 1-2 hours labor if not recall-eligible. Cable routing under hood lets road salt collect.

Estimated cost: $0 if recall applies; $200-350 otherwise