The iridium tipped OEM spark plugs in a fourth generation (2013, 2014, 2015, 2016 and maybe also the revised 2017 model year) Toyota RAV4 with the 2AR-FE 2.5 liter inline four cylinder motor should last up to 100,000 miles, but they should be checked well before that mileage to check how the engine is running. Take a look at my DIY tutorial for the procedure (including the replacement part numbers and a required tools list) by clicking on the text link or thumbnail image below.
2013-2016 Toyota RAV4 2.5L I4 Engine Spark Plugs Replacement Guide
