The iridium tipped OEM spark plugs in the 2ZR-FE 1.8L I4 engine of a 10th generation Toyota Corolla can last over 100,000 miles. But they should be checked well before that time even if just to prevent them from becoming stuck in the cylinder heads. To view my complete DIY tutorial to the procedure, click on the text link or thumbnail image below.
09-13 Toyota Corolla Spark Plugs Replacement Guide
