On newer vehicles, 2000-2021, how often do the plugs need to be replaced. I’ve heard some people say, never. Is there any truth to this?
Yes. They can last the lifetime of the vehicle.
I would change them every 60k to 80k miles.
Thanks, Razmig.
Because manufacturers use different kinds of spark plugs, the best guide as to when they should be replaced is the maintenance schedule that comes with every vehicle either as part of the owner’s manual or as a separate guide found online.
For example, Toyota recommends changing the plugs every 120,000 miles on a Corolla, Rav4, or 4Runner, but every 60,000 miles on an 86 coupe, which was developed with Subaru and uses a Subaru engine. Ford advises to change the plugs at 100,000 miles on an F-150, the Explorer, and other models under “normal” driving conditions. If a vehicle frequently tows a trailer or spends a lot of time in stop-and-go traffic or idling, then Ford suggests installing fresh plugs every 60,000 miles. The plugs on BMWs such as the X3 and 3 series should be changed every 60,000 miles. On some Mercedes-Benz models, it’s as frequent as every 36,000 miles, but on others, the intervals are longer.
