The 2024 Impreza with the 2.0L FB20 boxer engine represents Subaru's latest naturally-aspirated platform. While still early in its lifecycle, the FB20 architecture has shown familiar Subaru weaknesses including head gasket seepage and CVT cooling concerns, though catastrophic failures remain uncommon when maintenance is followed.
CVT Transmission Oil Cooler Failure
Occasional · medium severityTypical onset: 40,000-80,000 mi
Symptoms: Transmission fluid seeping or dripping from front of vehicle, CVT overheating warning light on dash during highway driving or towing, Burnt transmission fluid smell, Hesitation or shuddering during acceleration after fluid loss
Fix: Replace external CVT oil cooler and lines, flush system, refill with Subaru High Torque CVT fluid. 3-4 hours labor. Critical to address early before fluid loss damages CVT internals.
Estimated cost: $800-1,400
Head Gasket Seepage (External Oil Weeping)
Occasional · low severityTypical onset: 60,000-100,000 mi
Symptoms: Oil residue visible on sides of engine block below cylinder heads, Slight oil burning smell after engine fully warmed, Slow oil consumption requiring top-off between changes, No coolant mixing or white smoke—purely external seepage
Fix: Replace both head gaskets with updated multi-layer steel (MLS) gaskets, machine heads if warped, new timing components, fluids. 12-16 hours labor. Not the catastrophic internal failure of older EJ engines, but still requires engine disassembly.
Estimated cost: $2,800-4,200
Transmission Mount Deterioration
Common · low severityTypical onset: 50,000-90,000 mi
Symptoms: Clunking or thudding when shifting from Park to Drive or Reverse, Excessive vibration at idle that changes when shifted into gear, Visible transmission sag or rubber separation on inspection, Increased NVH (noise/vibration/harshness) during acceleration
Fix: Replace rear transmission mount and potentially pitch stop mount. Requires supporting transmission/engine, unbolting crossmember. 1.5-2.5 hours labor.
Estimated cost: $300-600
Piston Ring Wear and Oil Consumption
Rare · high severityTypical onset: 80,000-130,000 mi
Symptoms: Excessive oil consumption—1 quart per 1,000-2,000 miles, Blue smoke from exhaust on cold start or deceleration, Fouled spark plugs causing misfires, Loss of compression on cylinder leak-down test
Fix: Requires short block replacement or full engine rebuild with new pistons, rings, bearings, and machine work. 18-24 hours labor. Rare on FB20, but documented on units with extended oil change intervals or severe duty use.
Estimated cost: $5,500-8,500
Fuel Filter Clogging (On Models Without Factory Fuel Filter)
Occasional · medium severitySymptoms: Hard starting or extended cranking, especially after sitting, Loss of power or hesitation under acceleration, Check engine light with fuel trim or fuel pressure codes, Symptoms worsen with lower fuel levels in tank
Fix: 2024 Impreza uses in-tank pump with integrated screen rather than inline filter. Contamination requires fuel pump assembly replacement. Drop tank, replace pump module. 2-3 hours labor. Often caused by bad fuel or neglected tank contamination.
Estimated cost: $600-1,100
Driveshaft U-Joint or CV Joint Wear (Recalled Component Risk)
Rare · high severityTypical onset: 70,000-120,000 mi
Symptoms: Clunking noise during acceleration or deceleration, especially in turns, Vibration felt through floor at highway speeds, Clicking or grinding from center of vehicle, In severe cases, complete driveshaft separation (catastrophic)
Fix: Inspect and replace driveshaft assembly if U-joint or center support bearing worn. NHTSA recall addresses specific production batches with premature wear. 2-3 hours labor for driveshaft R&R.
Estimated cost: $800-1,600
Solid daily driver with good reliability IF you maintain the CVT religiously and don't extend oil changes—skip it if you want true 'set and forget' maintenance.
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.