I use only NGK or Beru spark plugs.
I bought six OEM spark plugs at the Toyota dealership parts counter and it was $12!
OEM Toyota plugs will probably last forever but it depends if your gas mileage is like 5 to 10 miles less that's the only way I would change the back plugs.
Spark plugs 100k miles - $25
use beru plugs rather than Bosch, a lot of Bosch plugs sold for this application has the wrong heat range which can cause misfires.
I have an 02 4runner with 289,500 miles. I've had it for the last 106,000. Replaced the timing belt/ water pump twice. Replaced spark plugs twice. New brakes a few times.
Unfortunately no--replace them. The electrodes wear down and become less efficient. The good news is that iridium plugs have a tremendous lifespan. You're supposed to change them every 100k miles/167k km.
Bought a 03 100 series with 241,000 only issue was the number 7 spark plug blew out, had to re-tap it and install a aluminum sleeve, and replace the coil
Had these Beru plugs put in last year. Are they the kind that’s at greater risk for damaging the engine?
I was given an "offer" to have my spark plugs changed for $368!
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