Spark Plug Replacement, Less than 30,000? on 2006 Nissan Sentra

Should I replace my spark plugs at less than 30,000? My plugs are Iridium.

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2 answers
Iridium plugs should last from 80,000 to 100,000 miles but check your owners manual
No.Read the owners manual or call your local dealer. 105,000 miles for first major tune-up.