The 2021 Crosstrek is still young, but early patterns mirror older FB-series issues: CVT cooler failures, oil consumption on the 2.5L, and timing components that need attention earlier than expected. The hybrid variant adds complexity but hasn't shown major battery problems yet.
CVT Transmission Oil Cooler Failure
Occasional · high severityTypical onset: 40,000-80,000 mi
Symptoms: CVT fluid mixing with coolant (milky coolant or strawberry-shake appearance), Transmission overheating warnings on dash, Slipping or shuddering during acceleration, Sweet smell from exhaust or coolant overflow
Fix: Replace external CVT cooler and flush both cooling system and transmission. If contamination is severe, CVT replacement required. 4-6 hours labor for cooler only, 12+ hours if CVT is damaged.
Estimated cost: $800-1,200 cooler only, $5,500-7,500 with CVT replacement
Excessive Oil Consumption (2.5L FB25 Engine)
Common · medium severityTypical onset: 30,000-70,000 mi
Symptoms: Low oil light between changes (consuming 1 qt per 1,000-2,000 mi), Blue smoke on cold start or hard acceleration, Fouled spark plugs, Carbon buildup on valves
Fix: Subaru's official fix involves piston ring replacement and cylinder honing (short-block service). Some cases covered under extended warranty. 18-24 hours labor for proper short-block replacement.
Estimated cost: $4,500-6,500 if out of warranty
Timing Chain Stretch and Guide Wear
Occasional · high severityTypical onset: 80,000-120,000 mi
Symptoms: Cold-start rattle for 2-3 seconds (sounds like marbles), Check engine light with timing correlation codes (P0016, P0018), Rough idle or misfires, Loss of power under load
Fix: Replace timing chain, guides, tensioners, and both cam sprockets. Critical to catch early before chain jumps timing. 8-10 hours labor for proper job with reseal.
Estimated cost: $2,200-3,200
Park/Neutral Interlock Switch Failure
Rare · medium severitySymptoms: Engine won't start unless shifter is jiggled, Can shift out of park without pressing brake, Intermittent no-start in Park position, Backup lights stay on or don't work
Fix: Replace shift interlock switch on CVT. NHTSA recall exists for some VINs—check before paying. 1.5-2 hours labor.
Estimated cost: $250-400 if not covered by recall
Rear Transmission Mount Failure
Common · low severityTypical onset: 50,000-90,000 mi
Symptoms: Clunking when shifting from Park to Drive or Reverse, Excessive vibration at idle in gear, Visible engine movement when revving in park, Hesitation or jolt during initial acceleration
Fix: Replace rear pitch-stop mount (common wear item on Subarus). Upgraded aftermarket units available. 1-1.5 hours labor.
Estimated cost: $200-350
Valve Lifter Tick and Potential Failure (2.0L FB20)
Occasional · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Persistent valve train ticking that doesn't go away after warmup, Metallic tapping noise from cylinder heads, Slight loss of power or rough running, Check engine light with misfire codes
Fix: Requires removal of cylinder heads to replace collapsed lifters. Often find cam lobe wear as well. 12-16 hours labor for heads-off service with reseal.
Estimated cost: $3,000-4,500
Solid AWD value if you stay on top of oil consumption and CVT maintenance, but budget for timing chain work and avoid high-mileage examples without service records.
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.