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Toyota · Van · 2021–2025 Custom Search

Toyota Sienna XL40

Weaknesses, engine ratings and buying advice

★★★★★
3.0 / 5.0 · Based on 1 engine variants · How we rate

Generations

Engine Overview

The Toyota Sienna XL40 is available with one engine variant at 155 hp.

2.5L Hybrid · Petrol Hybrid· 245 PS
2021 2025

Flagship fourth-generation hybrid with Dynamic Force technology. Extremely economical for a vehicle of this size (under 5 l/100 km in the Camry). Timing chain, no known weaknesses so far. The gold standard for hybrid reliability.

  • !! Hybrid Battery: Moisture and Heat Protection from 150,000 km

    The hybrid battery in the RAV4 XA50 with A25A-FXS sits under the rear seat and can be damaged by moisture. Blocked ventilation slots lead to battery overheating.

    Symptoms: Hybrid warning light, reduced battery output, 'Check Hybrid System' message, in severe cases complete battery failure
    2,000–8,000 $
    Ad hybrid battery RAV4 Hybrid XA50HV battery A25A-FXS RAV4
  • !! EGR System Clogged and EGR Cooler Leaking from 130,000 km

    The EGR system on the A25A-FXS tends to clog with deposits from approximately 130,000 km. The EGR cooler develops cracks and allows coolant to enter the EGR circuit.

    Symptoms: Power loss; foul smell while driving; low coolant level; fault messages on the instrument cluster
    400–1,200 $
    Ad EGR cooler A25A-FXSEGR valve RAV4 2.5 Hybrid
  • !! Timing Chain Wear as Known Weak Point from 160,000 km

    The timing chain is considered a weak point on the A25A-FXS and should be inspected preventively at approximately 150,000 km. The frequent engine start/stop cycles in hybrid operation increase the load.

    Symptoms: Rattle on start-up; metallic noise from the timing chain area; slightly rough idle
    600–1,400 $
    Ad 13506-25020 timing chain kit A25A-FXStiming chain RAV4 Hybrid 2.5 XA50

+ 3 more engine weaknesses + vehicle weaknesses

Vehicle Weaknesses

WeaknessCost
!Hybrid system failure warning

Faulty connectors, weak 12V battery or loose ground. Rarely actual hybrid defect.

Symptoms: Warning message, reduced power, won't enter Ready mode
from 20,000 km
Ad hybrid harness Sienna XL4012V battery Sienna
 Medium
●Multimedia system occasionally freezes, CarPlay/Android Auto drops. OTA updates improve but do not fully resolve.

Multimedia system occasionally freezes, CarPlay/Android Auto disconnects. OTA updates improve but don't fully resolve.

Symptoms: Screen frozen, audio drops, restart by holding power button
from 20,000 km
Ad infotainment Toyota Sienna XL40multimedia system Sienna
 Low

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Known Problems and Issues +

A total of 13 weaknesses have been documented for the Toyota Sienna XL40 (2021–2025) — 6 engine-related and 7 vehicle-related. Typical issues affect Electronics, Suspension, Body, Brakes.

Sienna (A25A-FXS, 2021–2025) — Be Careful: Hybrid Battery: Moisture and Heat Protection, EGR System Clogged and EGR Cooler Leaking, Timing Chain Wear as Known Weak Point. Power: 245 PS.

What to watch out for with the Toyota Sienna? See the detailed listing of all engine and vehicle weaknesses in the sections above.

Frequently Asked Questions

What problems and weaknesses does the Toyota Sienna XL40 have? +
The Toyota Sienna XL40 has 6 known engine weaknesses and 7 vehicle weaknesses.
What should I look for when buying a used Toyota Sienna XL40? +
faq.watch_a_none
Which engine is recommended? +
Be careful: A25A-FXS (2.5L Hybrid). No engine is rated 'Good Choice'. The most fun to drive is the A25A-FXS (2.5L Hybrid).
Which Toyota Sienna XL40 engine is the most fun? +
The {code} ({displacement}) offers the most driving fun in the Toyota Sienna XL40 — rated: "Not Really". {description} 245 hp system output, hybrid mandatory from 2021. Sounds boring, drives surprisingly well. 36 mpg in a minivan — that's the argument. No driving fun ambitions, but the most efficient Sienna ever.
Is the Toyota Sienna XL40 worth buying used? +
The Toyota Sienna XL40 requires careful consideration — choosing the right engine variant is crucial.
What horsepower variants are available for the Toyota Sienna XL40? +
The Toyota Sienna XL40 is available with engine variants from 155 to 190 hp. Petrol: A25A-FXS (2.5L Hybrid).

Last updated: February 2026 · All information without guarantee