Hello everyone. I just changed the spark plugs on my 2018 IS350 F-Sport (which took forever lmao) and I was wondering if there is anything I should be concerned about with the old sparks. I have had the car since 2022 and about 43k miles and have no record if they have ever been changed. Lmk what you guys think! I don’t burn any oil and do oil changes in 3k intervals.

 

Here mines at 69k miles

 

they look just fine.

 

I assume you're using synthetic oil. Why are you changing oil at 3,000 miles?

 

I don't see anything I'd be too worried about. Number 5 could be slightly lean, but again, it doesn't look bad. I would also keep an eye on #2 and #5 spark plug wells for signs of oil seepage in the future.

 

@mhubbss33
@wsvc206
Could you tell me how on earth you guys managed to expose the middle and the one furthest inside from the driver side? I also have a 2018 IS350, and it's time for me to change mine. The repair manual is not helpful.
It looks like I can make a room for the middle plug by removing the gray zip tie. It looks like I have to remove the brown foamy stuff to expose the plug. Did you remove the two bolts in the red circles to remove the brown thing? I did manage to disengage the plastic case (in yellow) from the metal bracket, so if I remove the brown thing, I think I can move the wire harness to get to the plug (so I think...)

 

If you have Reddit, message me there as for some reason my comments always get deleted here.

my username is born-project-310

 

They look great, nothing to be concerned about.