Is the Toyota Sienna reliable?
56% of the 48 we inspected scored 60/100 or higher, with an average of 64/100 — it scores a little better than average.
48
Cars inspectedreal pre-purchase inspections64/100
Average conditionall cars we check: 61/10056%
In good shape (60+)all cars we check: 53%Across 48 used Toyota Siennas we inspected, this model scores a little better than average — average condition 64/100 vs 61 for all cars we check. Every number on this page comes from real pre-purchase inspections — cars people were about to buy and paid an independent inspector to go through point by point, engine to underbody, paint depth to error codes. Not owner surveys, not warranty statistics, not forum lore: what we actually found.
What we found
Most common faults
Oil leaks · Engine
48%
Tires condition & wear · Brakes and tires
42%
Low coolant / cooling system issues · Engine
33%
Active error codes · Electronic equipment
29%
Fluid leaks · Steering (hydraulic power)
27%
Share of inspected Toyota Siennas where each item was flagged.
How they score
Excellent 21%
Good 35%
Mediocre 38%
Poor 6%
Hidden history
What the seller might not mention — how often we find it on this model.
69%had a repainted or replaced panelall cars: 75%
2%showed structural repairall cars: 4%
10%had fault codes recently clearedall cars: 23%
How long does a Sienna stay good?
Good cars by mileage
Share of Toyota Siennas in good shape (scoring 60+/100) by mileage and by age when we inspected them (each dot ≥5 cars; rolled-back odometers excluded from the mileage curve). The dashed grey curve is all cars we check.
More on Toyota
RAV4
52 cars · 71% good
Highlander
38 cars · 61% good
Prius
60 cars · 59% good
Tacoma
44 cars · 53% good
Corolla
106 cars · 51% good
Tundra
48 cars · 48% good
Camry
98 cars · 46% good
4Runner
65 cars · 46% good
Avalon
26 cars · 42% good
Other Toyota models we've inspected — or see the full Toyota profile.
Straight from recent Toyota Sienna reports
2020 Toyota Sienna · 66k mi — flagged: dirty or low engine oil, battery condition, boots. Inspected Jul 11.
2013 Toyota Sienna · 168k mi — flagged: engine control module, cv joints, tire pressure monitoring system. Inspected Jul 10.
The bottom line
The Sienna’s weak spots cluster under the hood, so treat oil leaks and cooling-system trouble as your first two checks—nearly half the cars drip oil and a third run low on coolant. Next look at tire wear and the power-steering fluid; both show up often enough to justify walking away or hard negotiation if they’re already neglected. Active codes appear frequently too, so insist on a fresh scan before any deposit. History is relatively clean on structure, which means you can focus the deal on fixing those engine and tire items rather than accident scars. Prioritize any example that already looks dry and quiet up front, or budget for immediate service.
FAQ
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What are the most common problems on a used Toyota Sienna?
The items we flag most often are oil leaks (48%), tires condition & wear (42%), low coolant / cooling system issues (33%). Have these checked before buying.
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Should I worry about cleared fault codes?
On 10% of these cars the ECU codes had been erased shortly before sale, which can hide active faults. Ask for a diagnostic scan and start the engine from cold.
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Based on 48 inspections · updated Aug 1, 2026
