Is the Toyota Sienna reliable?
56% of the 48 we inspected scored 60/100 or higher, with an average of 63/100 — it scores about average.
48
Cars inspectedreal pre-purchase inspections63/100
Average conditionall cars we check: 61/10056%
In good shape (60+)all cars we check: 55%Across 48 used Toyota Siennas we inspected, this model scores about average — average condition 63/100 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 31%
Good 25%
Mediocre 23%
Poor 21%
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 · 79% good
Prius
61 cars · 67% good
Tacoma
45 cars · 63% good
Highlander
38 cars · 63% good
Corolla
108 cars · 60% good
Tundra
48 cars · 56% good
Camry
98 cars · 53% good
Avalon
26 cars · 50% good
4Runner
66 cars · 45% 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
Engine problems dominate the picture on used Siennas, with oil leaks hitting nearly half the examples and cooling-system troubles close behind, so start any inspection by crawling under for seepage and checking coolant levels and hoses before you even think about the rest. Tires and steering-fluid leaks add to the maintenance tally, meaning you should budget for fresh rubber and a power-steering flush if those check out dirty. The upside is structural repairs stay rare and fewer cars have had their codes wiped, so a clean history report plus a dry engine bay can justify paying closer to asking—or walking if the leaks are active.
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 12, 2026
