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.
2018 Toyota Sienna problems
A 2018 Toyota Sienna is now 8 years old, so an average example has covered around 108,000 miles. A late-run car · the most reliable part of the generation, but higher-mileage wear items are usually the deciding factor. Check the state safety inspection and service history alongside the documented faults below, which are sorted by whether a 2018 car has usually reached the mileage where they appear.
Compiled & reviewed by the VehicleFaults Research Team
Quick answer
The 2018 Toyota Sienna is 8 years old, so an average example has covered roughly 108,000 miles. At that mileage 2 of the documented faults are already due, so check those first.
Faults a 2018 example has usually reached
Documented onset mileage is at or below the ~108k miles an average 2018 car has covered.
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.
Faults that appear at any mileage
Age, electronics and build-related issues that are not mileage-driven.
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.
Inspecting a 2018 Toyota Sienna?
Generate a tickable pre-purchase checklist for this exact year, mileage and variant · add photos and notes as you inspect.
Check this exact carToyota Sienna · frequently 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.