spark plug replacement

[mariposamoreno]

hi everyone. is it necessary to replace spark plugs before 100,000 miles? she idles rough at red lights sometimes (it's been a mild winter) which i know is a bit normal for a corolla but i am wondering how long the plugs are supposed to last or i should save up and just have it done sooner than 100k. 2015 s, a little over 86 k

 

[jolly]

120K (or 12 years) according to your maintenance guide.
https://www.toyota.com/t3Portal/document/omms-s/T-MMS-15Corolla/pdf/2015_Toyota_Corolla_WMG.pdf

 

[ToyBoy]

On a 15 Corolla it is a very simple and cheap thing to do yourself. I changed mine on my 14 at around 60k . I would go ahead and change them to see if it made any difference in that idle issue. If no change then maybe something else needs attention.

 

[ToyBoy]

PS , I bought the original plugs on Ebay for $19 a set of 4 .

 

[Rock'n Roller]

For the rough idle condition, try cleaning your MAF sensor and throttle body bore/butterfly first. Unless your plugs are fouled, they typically go the distance.

 

[mariposamoreno]

will get throttle cleaned if need be when i go for next oil change in a month or so. thanks

 

[BLACKDEATH23]

I replaced mine at 75,000 miles so I would recommend it

 

[nmp1]

clean the throttle body, its a maintenance item on these cars.

 

[delrey]

What about the coil packs? Change those by 120k?

 

[BLACKDEATH23]

What about the coil packs? Change those by 120k?

yes I would recommend changing them at 100,000 miles I changed mine at 80,000 miles just to be safe I used the NGK coil pack on mine way better then stock and no issues plus comes with 3 year warranty