2006 SUBARU IMPREZA

Typical onset: 80,000-120,000 mi

Symptoms: Coolant seepage visible at cylinder head / block seam, especially passenger side, Sweet smell from exhaust or engine bay, Gradual coolant loss with no obvious external leak, White residue or crusty buildup on engine block below heads

Fix: Both head gaskets, head resurfacing, timing components, coolant, and fluids. Budget 12-16 hours labor. If caught early, heads rarely need major work. Delay it and you risk overheating, warped heads, or coolant intrusion into cylinders — then you're rebuilding or swapping the engine.

Estimated cost: $1,800-2,800

Typical onset: 100,000-150,000 mi

Symptoms: White smoke from exhaust on cold start, Coolant mixing with oil (milky dipstick or cap), Overheating episodes, especially after external gasket was ignored, Loss of compression in one or more cylinders, Hydro-lock or catastrophic bearing failure if coolant floods cylinder

Fix: Full engine teardown: pistons, rings, rod bearings, main bearings, machine work on block and heads, plus all gaskets and seals. 25-35 hours labor. Many owners opt for used short-block or remanufactured engine swap instead (18-22 hours). This happens when external leaks go untreated and coolant gets into combustion chambers.

Estimated cost: $4,000-7,500

Typical onset: 70,000-110,000 mi

Symptoms: Clunking or knocking over bumps, especially from front suspension, Wandering steering or vague feel at highway speeds, Visible crack in control arm body near ball joint or rear bushing (check with flashlight), May pass visual inspection if crack is hairline — catastrophic separation rare but documented

Fix: Replace both front lower control arms with revised Subaru parts (recall 12V498 in 2012 covered this, but many fell through cracks). 2-3 hours labor. Alignment required. Do NOT reuse old arms or buy cheapest aftermarket — they crack again.

Estimated cost: $600-900

Typical onset: 60,000-100,000 mi

Symptoms: Clunk or thud when shifting from Park to Drive or Reverse, Excessive driveline vibration at idle in gear, Visible sagging or torn rubber on rear transmission crossmember mount, Exaggerated engine rocking when revving in neutral

Fix: Replace rear transmission mount (also called pitch stop mount). 1.5-2 hours labor. Aftermarket Prothane or OEM both work well. While underneath, inspect front engine mounts and crossmember bushings — often tired at same mileage.

Estimated cost: $250-450

Typical onset: 90,000-130,000 mi

Symptoms: Transmission fluid spots under vehicle, often near radiator or frame rails, Low fluid level causing delayed engagement or slipping, Rust-through on steel ATF cooler lines running to front-mounted cooler, More common in salt-belt states

Fix: Replace corroded cooler lines, top off ATF, inspect cooler and radiator tank for cross-contamination. 2-3 hours labor. If coolant mixed with ATF (rare), flush entire system and consider transmission replacement. Catch it early — ATF leaks starve the trans fast.

Estimated cost: $400-700

Symptoms: NHTSA recall letters (multiple campaigns from 2013 onward), No symptoms — silent safety hazard, Inflator propellant degrades over time, especially in humid climates, Risk of explosive rupture and metal shrapnel on deployment

Fix: Dealer replacement of passenger airbag inflator, covered under recall. 1-2 hours labor (no cost to owner). CHECK VIN at NHTSA.gov — some owners never got notices. If buying used, confirm recall completion before purchase.

Estimated cost: $0 (recall)