Spark plugs
Hyundai Sonata / Sonata 2011 Owners Manual / Maintenance / Explanation of scheduled maintenance items / Spark plugs
Make sure to install new spark plugs of the correct heat range.
See also:
Recommended Engine Coolant
When adding coolant, use only deionized water or soft water for your vehicle
and never mix hard water in the coolant filled at the factory. An improper coolant
mixture can result in serious malfun ...
Immobilizer system (if equipped)
Your vehicle is equipped with an electronic engine immobilizer system to reduce
the risk of unauthorized vehicle use.
Your immobilizer system is comprised of a small transponder in the ignition key ...
Side repeater light bulb replacement (if equipped)
If the light bulb is not operating, have the vehicle checked by an authorized
HYUNDAI dealer. ...


