<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">My 2017 Honda Ridgeline is approaching its 105,000 mile service, which is a big one. New timing belt is the main event, but Honda also recommends new spark plugs. I did the timing belt on my old Ridgeline at 220,000 (it’s 3rd belt) but it was a PITA and I don’t think I want to take any chances on a newer, more valuable vehicle. Spark plugs are a different story and the dealer gets over $300 to do those!<div class=""><br class=""></div><div class="">The reason changing plugs is so expensive is Honda’s price for the plugs themselves. They list at $55 <u class="">each</u>, although you can get them discounted for the low, low price of about $40 each if you shop around. <a href="https://www.hondapartsconnection.com/oem-parts/honda-spark-plug-dilzkr7b11g-ngk-12290r9pa01" class="">https://www.hondapartsconnection.com/oem-parts/honda-spark-plug-dilzkr7b11g-ngk-12290r9pa01</a> But, here is where it gets interesting: The owner’s manual lists the plugs as NGK DILZKR7B11G, a number you can clearly see on the Honda box in the above link. NGK lists that plug as $18 each (<a href="https://www.ngk.com/ngk-95350-dilzkr7b11g-laser-iridium-spark-plug" class="">https://www.ngk.com/ngk-95350-dilzkr7b11g-laser-iridium-spark-plug</a>) and you can find them at Rock Auto for about $12.</div><div class=""><br class=""></div><div class="">Ridgeline owners seem to be divided as to whether the plugs in the NGK box are any different from the ones in the Honda box. I trust this group more than fellow Ridgeline owners. What do you guys say? Are the plugs in the Honda box likely to be different and worth an extra $170?</div><div class=""><br class=""></div><div class="">Jim</div></body></html>