Replace spark plugs every 60k?
Lexus Champion
Joined: Nov 2014
Posts: 13,614
Likes: 2,918
From: Texas
The OE spark plugs in the GS 350 as well as your GS 450h (just like my GS 450h) will last well over 200k miles with no diminished performance or fuel mileage. There is absolutely no need or benefit whatsoever to replace the spark plugs.
Last edited by bclexus; Aug 5, 2022 at 10:57 AM. Reason: grammar
Pit Crew
Joined: Sep 2016
Posts: 113
Likes: 14
From: Hawaii
Just for the heck of it, I did my spark plugs and cleaned my throttle body on my 2013 GS350 with 74k miles, I felt a difference but don't know if that's attributed to just the spark plug change.
Car pulls stronger in lower RPMs.
Car pulls stronger in lower RPMs.
Driver
Joined: Nov 2018
Posts: 82
Likes: 7
From: TX
Can someone cofirm the exact part number for the Lexus Spark Plugs; I see two numbers on the Lexus dealer website
9091901263
9091901249
Which is the correct one? Also, how many does this car take? I assume it's one for each cylinder , so need to get 6 in total, correct?
9091901263
9091901249
Which is the correct one? Also, how many does this car take? I assume it's one for each cylinder , so need to get 6 in total, correct?
Driver
Joined: Nov 2018
Posts: 82
Likes: 7
From: TX
Intermediate
Joined: Jan 2018
Posts: 470
Likes: 40
From: NY
Six Plugs
As for the correct one, I know Denso markets an aftermarket TT type plug (9091901249), and the other Part number is OEM what they use in the factory. Both have that second contact point on the ground electrode.
Both are excellent and interchangeable. Rockauto lists 2 Denso Plugs:
https://www.rockauto.com/en/catalog/...park+plug,7212
Specs are very slightly different. Nominal gap, and the finewire diameter.
As for the correct one, I know Denso markets an aftermarket TT type plug (9091901249), and the other Part number is OEM what they use in the factory. Both have that second contact point on the ground electrode.
Both are excellent and interchangeable. Rockauto lists 2 Denso Plugs:
https://www.rockauto.com/en/catalog/...park+plug,7212
Specs are very slightly different. Nominal gap, and the finewire diameter.
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Pit Crew
Joined: Feb 2022
Posts: 244
Likes: 66
From: IL
it depends. Which ones. Passenger side is easy. Just remove intake tube and its open access. on driver side the front one is also in the open. The middle and back ones I remember I had a little work to do, had to loosen the wire harness a little to access them.
Instructor
Joined: Jan 2018
Posts: 1,161
Likes: 408
From: Kentucky
Pit Crew
Joined: Feb 2022
Posts: 244
Likes: 66
From: IL
also did the transmission drain and fill at 100k and fluid was still red in color when it was draining. Did this to see the health of the engine and transmission. Pleased with the GS.
Lexus Champion
Joined: Nov 2014
Posts: 13,614
Likes: 2,918
From: Texas
Instructor
Joined: Jan 2018
Posts: 1,161
Likes: 408
From: Kentucky
And now you know. I changed trans and both diffs fluid at 70k, mostly because I was bored and curious. I still have not even looked at the plugs because it runs great.