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Toyota Sienna

3MZ-FE 3.3L V6 215 hp Automatic Van 2004–2006
✔ Good Choice
Engine 3MZ-FE ✔ Good Choice 1,800–6,000 €

3.3L V6 succeeding the 1MZ-FE. Lower sludge risk thanks to revised PCV from the factory. Valve cover gaskets leak similarly to the predecessor. Solid engine for minivan and SUV duty.

Fun Factor? Decent

Sienna XL20 V6 3.3 — reliable minivan, sliding door problem

215 hp V6 in the first modern Sienna. Sliding door failure is THE Sienna topic — Toyota extended warranty. Engine solid, sludge risk lower than 1MZ-FE.

Engine Weaknesses 2

!! Geringeres Risiko als beim 1MZ-FE dank überarbeitetem PCV, aber bei sehr langen Ölwechselintervallen weiterhin möglich.

Lower risk than the 1MZ-FE thanks to revised PCV, but still possible with very extended oil change intervals.

Symptoms: Thick oil, oil pressure fluctuations

1,000–3,000 € from 120,000 km
! Gleiche Problematik wie beim 1MZ-FE, aber etwas seltener. Hintere Dichtung schwer zugänglich.

Same issue as the 1MZ-FE, but slightly less common. Rear gasket with poor access.

Symptoms: Oil smell, oil drops under engine

500–1,200 € from 130,000 km

Vehicle Weaknesses 1

!! Electronics Kabel im Türmechanismus fransen aus, Schlossmotoren versagen. Toyota verlängerte Garantie auf 9 Jahre/120.000 Meilen für 2004-2010. Betrifft sehr viele Fahrzeuge.

Wiring in door mechanism frays, lock motors fail. Toyota extended warranty to 9 years/120k miles for 2004-2010. Affects very many vehicles.

300–1,800 € from 120,000 km

Reports & Tests

nhtsa_complaints NHTSA Complaint Summary 2026-03
Below Average

5377 owner complaints filed with NHTSA (2004–2010). Most reported: Body Structure (2094), Latches & Locks (557), Airbags (475).