2021 Toyota Sienna Pre-Purchase Inspection Checklist
Known Issues — 2021 Toyota Sienna
MODERATE
First-year of hybrid-only powertrain — monitor for battery module issues
MODERATE
Power sliding door software glitches — TSBs issued
MINOR
Fuel tank under-fill behavior reported by some owners
MINOR
Interior materials feel premium but some plastics scratch easily
MODERATE
AWD rear motor reliability data still accumulating
What to Inspect
- Test HV battery health via scan tool
- Test both power sliding doors
- Test AWD engagement if equipped
- Check fuel fill behavior
- Verify all infotainment and connectivity
Expected Maintenance Costs
| Service | Interval | Cost |
|---|---|---|
| Oil change | every 5,000 miles | $50-$80 |
| HV battery inspection | every 30,000 miles | $80-$150 |
| Brake pads (regenerative — long life) | every 80,000 miles | $100-$180 |
| Cabin air filter | every 15,000 miles | $20-$40 |
| 12V auxiliary battery | every 5-7 years | $150-$220 |
| Coolant flush | every 100,000 miles | $120-$180 |
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