2021 Toyota Sienna maintenance schedule

Written in plain English and reviewed by the eli5cars editorial team · Last reviewed June 2026

2.5L Dynamic Force 4-cylinder + electric motor(s) hybrid system (245 hp combined, eCVT) — hybrid-only powertrain, no non-hybrid engine offered; FWD standard, AWD (electronic on-demand rear e-axle) optionalLEXLEXSEMSRP $34,500

Jump to a mileage milestone:

30k miles 60k miles 90k miles 120k miles

Full service timeline

Mileage	Service items	Details
10k mi	Engine oil and filter change — 0W-16 full synthetic (Toyota factory-fill spec for the 2.5L Dynamic Force hybrid engine; 0W-20 is an acceptable substitute only if 0W-16 is unavailable) — Toyota's normal schedule is 10,000 mi/12 months, whichever comes first Tire rotation — Toyota recommends every 5,000 miles; perform an interim rotation at the 5,000-mile mark in addition to this service Inspect brake pads, rotors, lines and hoses Inspect 12V auxiliary battery terminals and state of charge (this battery powers accessories and the hybrid system controller — it is not the hybrid traction battery) Check hybrid inverter coolant reservoir level — separate cooling loop from the engine coolant; do not top off with engine coolant or vice versa Inspect tire pressure and condition for uneven wear Inspect all exterior lighting and wiper blades
15k mi	Engine oil and filter change (0W-16 full synthetic) Tire rotation Inspect brake system front and rear Inspect engine air filter — replace if dusty or restricted (Toyota normal-condition interval is typically ~30,000 mi) Inspect cabin air filter — replace if reduced airflow noted Inspect hybrid transaxle fluid (Toyota Genuine WS fluid) level — inspect only; no scheduled change interval under normal use Inspect rear e-axle motor mounts and wiring harness (AWD models — this is a sealed electric drive unit with no serviceable gear oil)
30k mi	Engine oil and filter change (0W-16 full synthetic) Tire rotation Replace engine air filter Replace cabin air filter Inspect spark plugs — iridium, Toyota factory long-life interval ~120,000 mi; do not replace at 30k Replace brake fluid — Toyota Super DOT 3 (Toyota calls for change based on time/contamination; many shops use 30k as a practical checkpoint) Inspect engine coolant and hybrid inverter coolant levels and condition Inspect accessory drive belt for cracking or glazing Inspect suspension, steering components, and CV boots	View →
60k mi	Engine oil and filter change (0W-16 full synthetic) Tire rotation Replace cabin air filter Replace engine air filter Replace brake fluid (Toyota Super DOT 3) Inspect engine coolant — Toyota Super Long Life Coolant (pink, silicate-free); first scheduled drain-and-fill is 10 years/100,000 mi under normal use, inspect condition now Inspect hybrid inverter coolant — separate long-life coolant circuit; inspect for discoloration or low level Inspect 12V auxiliary battery — replace if load test fails (typical service life 3–5 years) Inspect brake pads, rotors, and parking brake operation Inspect exhaust system and fuel lines	View →
90k mi	Engine oil and filter change (0W-16 full synthetic) Tire rotation Inspect spark plugs — condition and gap (approaching 120k factory interval) Replace brake fluid Inspect timing chain and tensioner — timing chain is a lifetime component under normal use, no scheduled replacement (no timing belt on this engine) Inspect accessory drive belt; replace if cracked or glazed Inspect hybrid transaxle fluid (WS) level and condition Full brake inspection front and rear	View →
120k mi	Engine oil and filter change (0W-16 full synthetic) Tire rotation Replace spark plugs — iridium, OEM-spec (Denso or NGK iridium per Toyota parts catalog); this is the factory long-life interval Replace engine coolant — Toyota Super Long Life Coolant flush and refill Replace brake fluid Replace accessory drive belt Inspect hybrid inverter coolant pump and reservoir; replace inverter coolant if contaminated Inspect hybrid (HV) traction battery state of health and cooling fan/intake filter operation — the HV battery itself has no scheduled fluid or replacement service under normal use and is covered by a separate long hybrid battery warranty Full suspension and steering inspection Inspect rear e-axle motor mounts and connectors (AWD models)	View →

Common symptoms for this vehicle

Check engine light on? Get a free code scan

If your check engine light is on, most auto-parts stores (AutoZone, O'Reilly, Advance) will read the code for FREE — no purchase required, just walk in. Bring the code back here and look it up at eli5cars.com/obd2 for the plain-English explanation.

Note: a scan only helps when there's an active fault code. For purely mechanical symptoms (noises, vibrations, leaks), a scan may show nothing — the suspects listed above are your starting point.