2020 SUBARU IMPREZA

Typical onset: 40,000-80,000 mi

Symptoms: Low oil warning light between oil changes, Burning 1+ quart per 1,000 miles, Blue smoke on cold starts or acceleration, Check engine light with P0420 catalyst efficiency code

Fix: FB20 engines develop piston ring issues where rings lose tension and oil control degrades. Subaru had extended warranty coverage on some units. Proper fix requires short block replacement (8-12 hours labor) or complete engine rebuild with updated rings and pistons. Band-aid solution is frequent oil top-ups, but that just delays the inevitable.

Estimated cost: $4,500-7,000

Typical onset: 50,000-90,000 mi

Symptoms: Shuddering or vibration during low-speed acceleration (15-25 mph), Hesitation when accelerating from stop, Occasional grinding or whining noise from transmission, Delayed engagement when shifting to Drive or Reverse

Fix: Lineartronic CVT develops torque converter shudder and valve body wear. Fluid change with Subaru High Torque CVT fluid (NOT universal CVT fluid) sometimes helps temporarily. Real fix is often valve body replacement (6-8 hours) or transmission replacement if torque converter is damaged (10-14 hours). Some units covered under extended warranty to 100k miles.

Estimated cost: $2,000-5,500

Typical onset: 60,000-100,000 mi

Symptoms: Red fluid puddle under front of vehicle, Low CVT fluid warning light, Transmission overheating warning, Visible fluid weeping from cooler lines at radiator

Fix: The CVT oil cooler lines at the radiator develop leaks at crimp connections or from road debris damage. Requires cooler line replacement (2-3 hours) and complete CVT fluid refill. Critical to catch early before CVT runs low and damages itself. Inspect carefully during any underbody service.

Estimated cost: $400-800

Symptoms: Engine stalls while driving with no warning, Hard starting or extended cranking, Loss of power at highway speeds, Engine dies and won't restart until it sits

Fix: Denso low-pressure fuel pump impellers can crack and fail suddenly, stranding the vehicle. This was a major recall across multiple manufacturers. If recall 20V-073 hasn't been performed, get it done immediately at any Subaru dealer (no charge). If post-recall failure occurs, pump replacement is 3-4 hours including tank drop.

Estimated cost: $0 (recall) or $800-1,200

Typical onset: 80,000-120,000 mi

Symptoms: White crusty residue at head/block joint on external engine, Slight coolant smell after engine is hot, Slow coolant loss with no visible leaks, Minor oil contamination in coolant overflow

Fix: The FB20 is MUCH better than older EJ engines, but some units still develop minor external head gasket seepage. Unlike catastrophic EJ failures, these usually weep externally first. Full head gasket job requires 12-15 hours labor and machine shop work for head resurfacing. If caught early and seepage is minor, some owners defer repair with monitoring.

Estimated cost: $2,500-3,500

Typical onset: 70,000-110,000 mi

Symptoms: Clunking when shifting from Park to Drive or Reverse, Excessive vibration at idle in gear, Visible sagging or torn rubber on passenger-side mount, Drivetrain movement visible during acceleration

Fix: The passenger-side transmission mount wears from CVT vibration and weight. Rubber delaminates or tears. Simple replacement (1.5-2 hours) but requires supporting the transmission. Use OEM Subaru mount—aftermarket versions fail quickly. Often replaced alongside engine mounts as a set.

Estimated cost: $250-450