The 2014 Forester XT uses Subaru's FA20DIT turbo boxer engine paired with a CVT, a generally solid combination but with some critical weak points around oil consumption, CVT cooler failures, and potential catastrophic engine damage if maintenance lapses.
Excessive Oil Consumption Leading to Engine Failure
Common · high severityTypical onset: 60,000-120,000 mi
Symptoms: Low oil warning light between changes, Blue smoke on startup or acceleration, Check engine light for misfire, Catastrophic engine failure if oil level goes critically low
Fix: Early FA20DIT engines burn oil due to piston ring design and cylinder wall wear. Minor consumption (1 qt per 1,000-1,500 mi) requires vigilant monitoring. Severe cases need complete short block replacement—14-18 hours labor depending on shop efficiency and whether turbos come off.
Estimated cost: $6,500-9,500
CVT Transmission Oil Cooler Failure
Common · high severityTypical onset: 80,000-140,000 mi
Symptoms: Transmission overheating warning, Milky or contaminated transmission fluid, Coolant in CVT or ATF in coolant reservoir (cross-contamination), Slipping or shuddering under load
Fix: The internal oil cooler in the radiator can fail, allowing coolant and CVT fluid to mix. Requires radiator replacement, complete CVT fluid flush (multiple drain/fills), and often external CVT cooler lines. If contamination went unnoticed, CVT replacement may be necessary. Cooler fix alone: 3-4 hours labor.
Estimated cost: $800-1,400 (cooler only); $4,500-6,500 (if CVT damaged)
Turbocharger Wastegate Rattle and Failure
Occasional · medium severityTypical onset: 70,000-110,000 mi
Symptoms: Rattling sound at idle or light throttle (cold engine especially), Overboosting or underboosting codes (P0234, P0299), Loss of power under acceleration, Turbo whine or squealing
Fix: Wastegate actuator rod wears or the internal wastegate flapper loosens, causing rattle and boost control issues. Turbo replacement is typical solution—8-10 hours labor with exhaust manifold removal, coolant/oil line work. Some shops attempt wastegate actuator replacement alone (IHI turbos), cutting time to 5-6 hours, but reliability varies.
Estimated cost: $1,800-2,800
Transmission Mount Failure
Common · low severityTypical onset: 60,000-100,000 mi
Symptoms: Clunking on shifts or acceleration/deceleration, Vibration at idle in Drive, Visible sagging or torn rubber on mount inspection
Fix: The pitch-stop mount (rear transmission mount) is a known weak point and wears prematurely. Replacement is straightforward—1.5-2 hours labor. Often done with other mount inspections.
Estimated cost: $250-450
Head Gasket Weeping (Less Common on FA20, But Still Occurs)
Occasional · medium severityTypical onset: 100,000-150,000 mi
Symptoms: External coolant seepage at head/block interface, Slight coolant loss without visible leaks elsewhere, Oil residue mixed with coolant around head perimeter
Fix: FA20 is not as notorious as EJ engines for head gasket failure, but external weeping still happens. Requires head removal, resurfacing, and gasket replacement—both heads for thoroughness. 12-16 hours labor, includes timing components and turbo removal.
Estimated cost: $3,200-4,800
High-Pressure Fuel Pump Failure
Occasional · medium severityTypical onset: 80,000-130,000 mi
Symptoms: Hard start or extended cranking, Rough idle and hesitation, Fuel pressure codes (P0087, P0088), Intermittent stalling
Fix: Direct-injection fuel pump on the FA20DIT can fail, often due to contamination or wear. Pump is on the cylinder head under the intake manifold. Replacement involves partial intake removal—4-5 hours labor. Not as catastrophic as oil consumption but can leave you stranded.
Estimated cost: $900-1,400
PCV System Clogging and Oil Separator Maintenance
Common · low severityTypical onset: 50,000-90,000 mi
Symptoms: Rough idle, Oil consumption increase, Oil in intake tubing, Check engine light for lean/rich codes
Fix: Turbocharged boxer engines route crankcase vapors back through the intake, and the PCV valve and oil separator screens clog with sludge over time. Cleaning or replacing components takes 2-3 hours. Preventive maintenance item that often gets skipped until drivability suffers.
Estimated cost: $300-600
Buy only with verified oil consumption history and transmission service records—great driving dynamics, but catastrophic engine/CVT failure potential makes unknowns very risky.
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.