The 2001 Legacy is a reliable AWD platform undermined by catastrophic head gasket failures on the 2.5L and transmission cooler rot on automatics. Budget for major engine work if buying high-mileage examples.
2.5L Head Gasket Failure (External Oil/Coolant Leaks)
Common · high severityTypical onset: 80,000-150,000 mi
Symptoms: Oil seepage visible at cylinder head/block junction on exterior, Coolant weeping from same area, sweet smell from engine bay, Oil-contaminated coolant or milky dipstick in severe cases, White smoke on cold start if coolant enters combustion chamber
Fix: Full head gasket replacement requires engine removal or lifting for access. Replace timing belt, water pump, all seals while open. 14-18 labor hours depending on shop method and if heads need machining.
Estimated cost: $2,200-3,500
Automatic Transmission Oil Cooler Line Corrosion
Common · high severityTypical onset: 90,000-130,000 mi
Symptoms: Pink or red fluid dripping from radiator area, Transmission overheating or erratic shifts, Visible rust perforation on steel cooler lines routing to radiator, Total fluid loss can occur rapidly if line ruptures while driving
Fix: Replace both cooler lines and inspect radiator-mounted cooler for cross-contamination. Some techs replace entire radiator assembly to prevent future cooler failure mixing ATF and coolant. 2-3 hours labor.
Estimated cost: $400-800
Rear Wheel Bearing Failure
Common · medium severityTypical onset: 100,000-160,000 mi
Symptoms: Grinding or humming noise from rear that increases with speed, Noise may change pitch during turns, Excessive wheel play detectable on lift, ABS light may illuminate in late-stage failure
Fix: Hub and bearing assembly replacement per side. Requires press work or hub removal tools. 2-2.5 hours per side labor.
Estimated cost: $350-550
Front Lower Control Arm Bushing Deterioration
Occasional · medium severityTypical onset: 110,000-140,000 mi
Symptoms: Clunking over bumps or during braking/acceleration, Steering wander or vague on-center feel, Visible cracking or tearing of rubber bushings on inspection, Uneven front tire wear if severely worn
Fix: Replace front lower control arms as assemblies (bushing-only replacement not cost-effective). Alignment required after. 3-4 hours labor both sides.
Estimated cost: $500-750
Catalytic Converter Failure (Pre-Cat)
Occasional · medium severityTypical onset: 120,000-180,000 mi
Symptoms: Check engine light with P0420 code (catalyst efficiency below threshold), Slight loss of power or fuel economy decline, Rattle from exhaust on cold start if substrate breaks apart, Will not pass emissions testing in regulated states
Fix: Replace front catalytic converter assembly. Aftermarket cats available but OE-spec units last longer. 2-3 hours labor depending on hardware corrosion.
Estimated cost: $600-1,200
Steering Rack Leak at Tie Rod Boots
Occasional · medium severityTypical onset: 100,000-140,000 mi
Symptoms: Power steering fluid dripping from inner tie rod area, Whining or groaning during turns if fluid level drops, Visible grease or fluid on inner CV boot area, Steering may feel heavier if significant fluid loss
Fix: Rack replacement most common repair; rebuilds rarely cost-effective. Some shops attempt boot/seal replacement but success rate mixed. 4-5 hours for rack replacement including alignment.
Estimated cost: $800-1,400
Buy only if head gaskets already done or priced to absorb the repair — otherwise a maintenance time bomb that will strand you expensively.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.