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:
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 ...
Efficiency & Drivability
Automakers have been racing to produce small cars that get great gas mileage
using conventional engines, and Hyundai has succeeded on that front with the
2011 Elantra, which is powered by a new 14 ...
97,500 miles (156,000 km) or 78 months
❑ Inspect air cleaner filter
❑ Inspect vacuum hose
❑ Replace engine oil and filter (97,500 miles (156,000 km) or 156 months) ...


