The 2020 Century is Toyota's ultra-luxury flagship with the 5.0L 2UR-FSE hybrid V8—rare in North America but known for robust engineering. Most issues stem from the complex hybrid system, aging V8 internals on higher-mileage examples, and specialized parts availability rather than fundamental design flaws.
Transmission Oil Cooler Leaks
Occasional · medium severity
Typical onset: 60,000-90,000 mi
Symptoms: Pink or red fluid pooling under front of vehicle, Transmission temperature warning on dash, Slipping or delayed shifts when fluid level drops
Fix: Replace transmission oil cooler and lines, flush system. 4-6 hours labor due to tight packaging around hybrid components and need to access from underneath. Genuine Toyota parts strongly recommended.
Estimated cost: $1,800-3,200
Timing Chain Stretch and Tensioner Wear
Occasional · high severity
Typical onset: 100,000-150,000 mi
Symptoms: Cold-start rattle lasting 2-3 seconds, Check engine light with cam/crank correlation codes (P0016, P0018), Rough idle or misfire at startup, Metal shavings in oil at changes
Fix: Replace timing chains, guides, tensioners on both banks. Often reveals worn cam phasers requiring replacement. 18-24 hours labor—engine doesn't need to come out but requires removing front accessories, radiator, and valve covers. Critical to prevent catastrophic failure.
Estimated cost: $4,500-7,500
Hydraulic Valve Lifter Noise and Failure
Common · medium severity
Typical onset: 80,000-120,000 mi
Symptoms: Ticking or tapping from valve covers that increases with RPM, Noise present hot or cold, doesn't go away after warmup, Occasional misfire codes if lifter collapses completely, Loss of power under acceleration
Fix: Replace affected lifters—may be single cylinder or entire bank depending on extent. Requires valve cover removal and camshaft R&R for access. 8-14 hours labor. Smart to inspect cam lobes and replace if scored. Oil change history matters here—neglected oil causes premature wear.
Estimated cost: $2,200-4,800
Hybrid Battery Cooling System Issues
Rare · high severity
Symptoms: Hybrid system warning light with reduced power mode, Error codes related to battery temperature (P0A93, P3009), Reduced fuel economy and sluggish hybrid assist, Battery fans running constantly or not at all
Fix: Inspect and clean hybrid battery cooling fan filters (often clogged), test cooling fans, check refrigerant in battery cooling loop. If battery overheats repeatedly, individual cell modules may need replacement. Diagnosis 2-3 hours, repair varies widely—filter cleaning is $200, battery module replacement requires dealer involvement and can exceed $8,000.
Estimated cost: $200-9,500
Harmonic Balancer Deterioration
Occasional · medium severity
Typical onset: 90,000-130,000 mi
Symptoms: Visible wobble on front crank pulley at idle, Rumbling vibration at specific RPM ranges (1,500-2,000), Serpentine belt wear or tracking issues, Rubber separating from outer ring—look for black dust around pulley
Fix: Replace harmonic balancer/crankshaft pulley assembly. Requires special puller tool and careful installation to avoid damaging crankshaft seal. 3-4 hours labor. Use OEM part—aftermarket failures common on this engine.
Estimated cost: $800-1,400
Transmission Mount Degradation
Common · low severity
Typical onset: 70,000-110,000 mi
Symptoms: Clunk when shifting from Park to Drive or Reverse, Vibration through cabin at idle in Drive, Excessive drivetrain movement visible when revving in Park, Lurching sensation during acceleration
Fix: Replace transmission mounts—usually front and rear. Hybrid transaxle is heavy, mounts wear faster than conventional transmissions. Requires supporting drivetrain during removal. 2-3 hours labor.
Estimated cost: $600-1,100
Owner tips
Religious 5,000-mile synthetic oil changes are critical—the 2UR-FSE is intolerant of oil degradation and causes lifter/timing chain issues when neglected
Hybrid battery cooling filters should be inspected every 30,000 miles and cleaned—simple DIY that prevents expensive battery failures
Use only Toyota WS transmission fluid for CVT—aftermarket equivalents cause shudder and premature wear
Keep detailed service records—these cars are rare and finding one with documented hybrid system maintenance is worth a premium
Buy only with complete service history showing hybrid system maintenance and evidence of frequent oil changes—mechanically solid but parts scarcity and hybrid complexity make neglected examples expensive gambles.
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.
Fitment notes: AGM battery required for hybrid system; auxiliary 12V battery located in trunk; lower CCA typical for hybrid applications as engine starting assist provided by hybrid system
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Every control module on the 2018-2026 Toyota Century — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
⚠️ Manages CAN bus communication between multiple networks; VIN registration required
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2020 Toyota Century 5.0L V8 Hybrid 2UR-FSE and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.