The 2018 Outback is generally reliable, but the 2.5L FB25 engine is notorious for excessive oil consumption from piston ring land deposits, sometimes requiring full engine rebuilds. The CVT transmission can develop fluid cooler leaks and internal bearing issues, especially in higher-mileage units.
FB25 2.5L Engine Excessive Oil Consumption / Piston Ring Failure
Common · high severityTypical onset: 60,000-120,000 mi
Symptoms: Burning through 1+ quart of oil between changes, Blue smoke on cold start or acceleration, Check engine light with lean codes or misfire codes, Carbon buildup visible on spark plugs
Fix: Ring land deposits prevent proper ring sealing. Subaru extended warranty covered some cases, but out-of-warranty requires short block replacement or full engine rebuild. 18-25 labor hours for short block swap including timing components, fluids, and gaskets.
Estimated cost: $5,500-8,500
CVT Transmission Oil Cooler Line Leaks
Occasional · medium severityTypical onset: 70,000-110,000 mi
Symptoms: Red transmission fluid pooling under vehicle, Low CVT fluid warning light, Transmission slipping or delayed engagement, Fluid visible on cooler lines at radiator connection
Fix: Rubber cooler lines or connections at the radiator crack and leak. Requires line replacement, sometimes radiator tank repair if corrosion is present. 2-4 hours labor depending on access and if radiator needs removal.
Estimated cost: $400-900
CVT Internal Bearing Failure (Valve Body / Torque Converter)
Occasional · high severityTypical onset: 90,000-150,000 mi
Symptoms: Shuddering or juddering during acceleration, Whining or grinding noise from transmission, Hesitation when accelerating from stop, Metallic particles in CVT fluid on drain
Fix: Internal bearings or valve body components fail, contaminating fluid with metal. Often requires CVT replacement or rebuild. Subaru extended CVT warranty to 100k miles on some VINs. 10-14 hours for R&R plus core charges.
Estimated cost: $4,500-7,000
Head Gasket Seepage (3.6L H6 Primarily)
Occasional · medium severityTypical onset: 80,000-130,000 mi
Symptoms: External coolant seepage at head-to-block mating surface, Sweet coolant smell after driving, Slow coolant loss without visible leaks elsewhere, No overheating or combustion gas contamination initially
Fix: The 3.6L H6 can develop external head gasket weeps, though much less catastrophic than older EJ engines. Requires both head gaskets, timing chains, and associated seals. 16-20 hours labor for both sides.
Estimated cost: $3,200-4,800
Fuel Pump Recall and Premature Failures
Occasional · medium severitySymptoms: Engine stalling while driving, Hard start or no start condition, Loss of power under load, Check engine light with fuel pressure codes
Fix: NHTSA recall for fuel pump impeller cracking. Even post-recall, some replacement pumps fail prematurely. Fuel pump replacement requires dropping tank, 2.5-3.5 hours labor.
Estimated cost: $600-1,100
EyeSight Camera Condensation / Mirror Auto-Dim Failure
Occasional · low severitySymptoms: EyeSight system disabled warning on dash, Moisture visible inside windshield camera housing, Auto-dimming mirror stays dark or won't dim, Pre-collision braking unavailable message
Fix: Windshield-mounted EyeSight cameras or auto-dim mirror develop internal condensation or electronics failure. Mirror assembly or camera unit replacement required, includes recalibration. 1.5-3 hours depending on component.
Estimated cost: $800-1,800
Solid platform if the 2.5L has clean oil consumption history and CVT has been maintained; budget $1k-2k reserve for potential engine or transmission surprises on higher-mileage examples.
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.