22,500 miles (36,000 km) or 18 months
Hyundai Sonata / Sonata 2011 Owners Manual / Maintenance / Scheduled maintenance service / 22,500 miles (36,000 km) or 18 months
❑ Inspect air cleaner filter ❑ Inspect vacuum hose ❑ Replace engine oil and filter (22,500 miles (36,000 km) or 36 months)
See also:
Using a cellular phone or a two-way radio
When a cellular phone is used inside the vehicle, noise may be produced from
the audio equipment. This does not mean that something is wrong with the audio equipment.
In such a case, use the cellu ...
Trailer towing
We do not recommend using this vehicle for trailer towing. ...
One Person Per Belt
Two people (including children) should never attempt to use a single seat belt.
This could increase the severity of injuries in case of an accident. ...


