The 2025 Crosstrek shares the sixth-generation platform with solid fundamentals, but the FB20 engine carries forward known oil consumption issues and CVT longevity concerns that have plagued Subarus for years. The hybrid drivetrain is too new for long-term patterns, but early reports show electrical complexity adding failure points.
Excessive Oil Consumption (FB20 Non-Hybrid)
Common · high severityTypical onset: 40,000-80,000 mi
Symptoms: Low oil light between changes, consuming 1+ quart per 1,000 miles, Blue smoke on cold starts or deceleration, Carbon buildup on intake valves causing rough idle and hesitation
Fix: Piston ring replacement requires full engine teardown (16-20 hours labor). Subaru has extended warranty coverage on some VINs, but post-warranty you're looking at short block replacement or rebuild. Valve cleaning adds 4-6 hours if carbon fouling is severe.
Estimated cost: $4,500-7,000
CVT Transmission Shuddering and Failure
Occasional · high severityTypical onset: 60,000-120,000 mi
Symptoms: Shudder or vibration during light acceleration at 25-50 mph, Delayed engagement when shifting from Park to Drive, Burning smell from transmission area, Whining or grinding noise under load
Fix: Early shudder often responds to fluid exchange and software updates (2 hours), but persistent issues require CVT replacement. Subaru extended CVT warranty to 100k miles on many models—verify coverage. Full CVT swap is 8-12 hours labor.
Estimated cost: $500-8,500
Timing Chain Tensioner Failure (FB20)
Occasional · high severityTypical onset: 80,000-140,000 mi
Symptoms: Rattling noise from engine on cold start, disappears after warmup, Check engine light with cam/crank correlation codes (P0016, P0017), Metal shavings in oil during changes
Fix: Requires timing chain, tensioner, guides, and oil pump chain replacement. Boxer engine layout makes access difficult—12-16 hours labor. If chain has jumped teeth, valve damage adds cylinder head work (add 8+ hours).
Estimated cost: $2,800-5,500
Head Gasket Leaks (FB Engines)
Occasional · medium severityTypical onset: 100,000-150,000 mi
Symptoms: Oil seepage at head-to-block mating surface (external leak), Coolant loss without visible external leaks, White smoke from exhaust, sweet smell, Overheating, bubbles in coolant reservoir
Fix: FB engines are better than EJ series, but still see external seepage. External leak repair is 10-14 hours (heads don't need to come off in early stages). Internal coolant leaks require full head removal, machining checks, and complete gasket set—18-24 hours.
Estimated cost: $1,800-4,200
Hybrid Battery Cooling System Failures (Hybrid Models)
Rare · high severityTypical onset: 50,000-90,000 mi
Symptoms: Hybrid system warning light with reduced power, Battery overheat messages in winter or summer extremes, HVAC blower runs constantly even when parked, Reduced electric-only range
Fix: Cooling fan motor or control module for hybrid battery. Module diagnosis 1-2 hours, fan replacement 3-4 hours. Battery itself has 8yr/100k warranty but cooling system isn't always covered. Full battery replacement if thermal damage occurs is 6-8 hours labor plus $3,000+ part cost.
Estimated cost: $800-5,500
Transmission Oil Cooler Line Corrosion
Occasional · medium severityTypical onset: 70,000-110,000 mi
Symptoms: Red fluid spots under vehicle near front wheels, Transmission slipping or overheating after highway driving, Low CVT fluid level on dipstick check
Fix: Steel lines rust through where they pass near wheel wells (salt-belt states). Line replacement is 2-4 hours depending on which line failed. Full cooler assembly replacement if core leaks adds 1-2 hours. Must evacuate and refill CVT fluid.
Estimated cost: $600-1,200
Decent crossover if you're diligent about oil checks and CVT maintenance, but the FB20 oil consumption issue is a ticking time bomb post-warranty—budget $5k for major engine work or walk away from high-mileage examples burning oil.
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.