The iridium tipped OEM spark plugs of a 3rd generation 2006 to 2012 Toyota RAV4 should last 100,000 miles. But their condition should be checked before that time if only to ensure that they do not become frozen in the cylinder head. For my complete DIY guide to the procedure, click on the text link or thumbnail image below.
Toyota RAV4 2.5L I4 Engine Spark Plugs Replacement Guide
