Have a look in your toolkit that came with the car. The plug spanner is in there ! Go and get yourself some NGK Iridium Plugs (about $15 each plug) Part No. BKR5EIX-11 They are supposed to last 60,000 kms. So you won't need to do it again for a few years Standard Plugs are supposed to be replaced every 20,000 to 40,000kms.