BodyMedium
Power sliding door cable / motor failure.
- Typically appears
- 70,000+ miles
- What to inspect
- Cycle both power doors several times and listen for grinding.
2011–2020 Toyota Sienna · common problems & known faults
The 3rd-gen Sienna is a dependable V6 minivan; power sliding doors and a rubber oil-supply hose are the items to verify.
Compiled & reviewed by the VehicleFaults Research Team · last reviewed July 2026
Quick answer
The most commonly reported faults on the 2011–2020 Toyota Sienna are Rubber oil-supply hose (VVT) leak on early cars (recall), Coolant leak and whining noise from the auxiliary belt area due to water pump bearing failure and Power sliding door cable / motor failure. 2 of the documented issues are rated high severity · inspect these first. Full inspection points, onset mileage and what to check are listed below.
Reliability snapshot
Based on the documented faults on this page for the Toyota Sienna.
4.8/ 10
- Critical
- 0
- High
- 2
- Medium
- 5
- Low
- 1
Guidance only · reflects reported patterns, not a specific car's condition.
Toyota Sienna problems by year
Which faults an average example has usually reached depends on its age. Pick a model year for the faults that matter on that build.
Known faults to check
EngineHigh
Rubber oil-supply hose (VVT) leak on early cars (recall).
- Typically appears
- Age-related
- What to inspect
- Confirm the oil-hose recall was completed.
InteriorLow
Dashboard glare / softening in hot climates.
- Typically appears
- Age-related
- What to inspect
- Check the dash top for tackiness.
BrakesMedium
Brake actuator / ABS sensor faults triggering warning lights.
- Typically appears
- 90,000+ miles
- What to inspect
- Scan for ABS/VSC codes on the test drive.
EngineHigh
Coolant leak and whining noise from the auxiliary belt area due to water pump bearing failure.
- Typically appears
- 60,000-90,000 miles
- What to inspect
- Open the bonnet and shine a torch down the right side of the engine block. Look for a build-up of dried, pink coolant crust around the water pump pulley.
TransmissionMedium
Hesitation, surging, or harsh gear engagements at low speeds on 2017 onwards models with the 8-speed automatic gearbox.
- Typically appears
- 20,000-50,000 miles
- What to inspect
- Conduct a low-speed test drive at 10-20 mph. Repeatedly apply and release the throttle to see if the gearbox clunks or hesitates when deciding which gear to select.
SteeringMedium
Knocking or rattling sensation felt directly through the steering wheel over rough surfaces due to intermediate shaft wear.
- Typically appears
- 50,000-80,000 miles
- What to inspect
- With the engine running and the vehicle stationary, rock the steering wheel rapidly left and right. Listen closely for a distinct metallic clunk originating from the driver's footwell.
SuspensionMedium
Vague steering feel, clunking over speed bumps, and accelerated wear on the inner edges of the front tyres.
- Typically appears
- 70,000-100,000 miles
- What to inspect
- Apply the handbrake firmly, engage drive, and lightly blip the throttle while an observer watches the front wheels for excessive fore-and-aft movement indicating torn lower control arm bushes.
Inspecting a Toyota Sienna?
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Check this exact carFrequently asked questions
Is the Sienna reliable?
Yes — the 3.5L V6 is strong. Power-door hardware is the most common nuisance repair.
What breaks on a Sienna?
Power sliding doors and, on early cars, the VVT oil-supply hose.
Is AWD Sienna worth it?
AWD adds capability but also runflat tyres and slightly more maintenance; inspect tyres closely.
Does the 3.5-litre V6 engine use a timing belt or a timing chain?
Both the earlier 2GR-FE and the later 2GR-FKS 3.5-litre V6 engines utilise a timing chain rather than a rubber belt. These chains are generally maintenance-free for the life of the vehicle, provided previous owners adhered to strict oil change intervals to prevent tensioner wear.
Why do AWD models often suffer from harsh ride quality and rapid tyre wear?
All-wheel-drive Siennas lack a spare wheel well and were factory-fitted with run-flat tyres. These tyres feature incredibly stiff sidewalls, which compromises ride comfort and leads to accelerated tread wear. Many UK owners replace them with standard tyres and carry a puncture repair kit to improve refinement.
Are replacement parts difficult to source in the UK for this imported model?
While the Sienna was never officially sold in the UK, it shares its V6 powertrain and many chassis components with the Lexus RX350 and Toyota Highlander. Consumables like brake pads, filters, and suspension parts are readily available from UK motor factors, though bespoke body panels require importing.
Sources & further reading
Faults are compiled from documented recalls, technical bulletins, owner reports and mechanic sources, then reviewed for accuracy. This is guidance only · not a substitute for a professional inspection.