The 2002 WRX is the first-gen turbocharged rally icon that's either been loved to death or beaten like a rental car. The EJ205 engine is stout when maintained but catastrophic when modded improperly or oil-starved, and the five-speed gearbox is the weak link in the drivetrain.
Head Gasket Failure (External Coolant Weep)
Common · medium severityTypical onset: 80,000-130,000 mi
Symptoms: Coolant seepage visible at head/block junction on bottom of engine, Sweet smell after driving, crusty white residue on block, Slow coolant loss without visible leaks elsewhere, Occasional rough cold start if coolant gets into cylinder
Fix: Factory multi-layer steel gaskets weep externally. Requires engine-out service (subframe drop method) or pulling engine. 12-16 hours labor. OEM gaskets only—aftermarket failures common. Resurface heads, replace timing components and water pump while apart.
Estimated cost: $2,200-3,200
Five-Speed Transmission Synchro Wear and Bearing Failure
Common · high severityTypical onset: 60,000-100,000 mi
Symptoms: Second-gear crunch or grind on upshifts, especially when cold, Whining in third or fourth gear under load, Difficulty engaging reverse, Metallic debris on drain plug magnet
Fix: The five-speed gearbox is glass with aggressive driving or clutch dump abuse. Second-gear synchros fail first, then bearings follow. Rebuild requires transmission removal (6-8 hours), full teardown, bearing/synchro replacement (4-6 hours assembly). Six-speed swap from STI is common alternative. Used transmissions are gambles—most have been beaten.
Estimated cost: $2,800-4,500
Turbocharger Failure from Oil Starvation
Occasional · high severityTypical onset: 90,000-140,000 mi
Symptoms: Excessive blue smoke on startup or under boost, High-pitched whistle or grinding from turbo, Loss of boost pressure, sluggish acceleration, Oil consumption increase without external leaks
Fix: TD04 turbo fails when oil changes are stretched or low-quality oil used. Shaft play kills seals, burns oil, then grenades bearings. Turbo replacement requires 5-7 hours (manifold studs always break). Inspect banjo bolt filters on oil feed—clogging kills turbos. Replace with OEM or quality aftermarket, avoid eBay specials.
Estimated cost: $1,800-2,800
Rod Bearing Failure (Catastrophic Engine Damage)
Occasional · high severityTypical onset: Any mileage if modded/abused; 120,000+ mi stock
Symptoms: Rod knock: loud metallic tapping that increases with RPM, Low oil pressure at idle when warm, Sudden loss of power, immediate engine failure, Metal flakes in oil, bearing material on drain plug
Fix: EJ205 rod bearings are marginal with spirited driving, especially if oil changes are delayed or engine is tuned without supporting mods. Once knock starts, engine is done. Requires short block replacement or full rebuild. 18-24 hours labor for engine removal, teardown, machine work, reassembly. Used short blocks are Russian roulette—most have unknown histories.
Estimated cost: $4,500-7,500
Transmission Oil Cooler Line Corrosion and Leaks
Common · medium severityTypical onset: Not mileage-driven—age and road salt related
Symptoms: Transmission fluid puddles under car, front-center area, Burnt smell from fluid dripping on exhaust, Low fluid level causes slipping or delayed engagement, Visible rust and weeping at cooler line fittings
Fix: Steel lines and cooler corrode from road salt, especially in rust belt. Lines run along subframe and are vulnerable. Replace lines and cooler together to avoid comeback. 3-4 hours labor. Requires subframe drop or creative access. Flush system after repair.
Estimated cost: $600-1,000
Rear Differential Carrier Bearing Noise
Occasional · low severityTypical onset: 100,000-150,000 mi
Symptoms: Whirring or humming from rear that increases with speed, Noise changes pitch in turns, Vibration through chassis at highway speeds, Gear oil contamination with metal particles
Fix: R160 rear diff bearings wear over time, especially if fluid changes were skipped. Rebuild requires diff removal (3 hours), disassembly, bearing/seal replacement (4-5 hours total). Can also swap in used diff, but bearings are often tired. Use OEM fluid spec or synthetic 75W-90 GL-5.
Estimated cost: $1,200-1,800
Buy only if stock, well-documented maintenance, and you have $3k-5k in reserve for the inevitable transmission or engine work—most have been thrashed.
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.