vs
Spark plug OEM BMW or Denso
I would stick with the specd Denso, leave the coils alone.
Vehicle:
Toyota Prius
I recently was having a misfire in cylinders 2/3, and new plugs and ignition coils cleared it up.
Pros: cleared up misfire
DENSO ZXE24HLR7 is also an excellent OE plug.
Pros: excellent OE plug
Part number: ZXE24HLR7
Denso 3289 is what I run.
398k on the clock, like 50k on these plugs, she runs clean and smooth.
Pros: runs clean and smooth
Mileage: 50000 km
Part number: 3289
Denso for my runner
Vehicle:
Toyota 4runner
Denso or NGK. Buy them from a real vendor not eBay or Amazon or anything like that
Replace with OEM - Denso. And yeah, get them from rock auto. Anywhere else is way too expensive and eBay is most likely counterfeit garbage.
Cons: expensive elsewhere
They look good but if the vehicle has 83k, they were replaced before, Denso is OE on toyota and Autolite are shit plugs so no way they were in since the car was brand new.
Pros: look good
Cons: shit plugs
Vehicle:
Toyota
Mileage: 133575 km
definitely not ok, they are spent, also Denso>NgK any day of the week
Pros: Denso better than NGK
Cons: they are spent
Cylinders 1-3 were misfiring. They couldn't get the spark plug out of cylinder 3 because the other dealership had over tightened it. They had to get a special tool to remove it. The tool BROKE because apparently it was so overtightened and mis-threaded. They finally got it out yesterday and sent the cylinder to the machine shop to get the head off. I just got word that there is a hole in the piston and the valve head is completely gone. They are saying now that it has nothing to do with the spark plug being overtightened. He asked about driving through water, and road conditions. It was a dry day. Not an issue. They said I need a new motor at this point.
Pros: spark plug removed, new motor needed
Cons: overtightened spark plug, broken tool, hole in piston, valve head gone
Vehicle:
BMW M4
Mileage: 23800 km
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