Spark plug OEM Toyota or Denso

I've always used the Denso SK20R11 plugs in mine and been pleased.

Denso iridium plugs, no more no less and no exceptions.

denso iridium. do them and they’ll be good for another 200k km or more

Denso and Bosch have worked well for us on a 1.6.

Denso itv20 (5339) for stock/mostly stock. ITV22 (5340) step colder if more mods. I have only used itv22 since 2015.

I went with Denso's on my 1.8T because that is what I had on the shelf. but I have ran anything and everything in vehicles over the years, and found that there is not much different between the different types.

As always, go with NGK or Denso plugs.

Bought some Denso 3450 Irdium plugs online. After reading about counterfits. I decided to test mine.

All are gapped .43 for the OEM spec for a 2014 Nissan Xterra. I measured the Irdium electrode tip which is 0.7mm and appears blue

I had EPC light/limp mode and P303 as well about a month ago on my '12 GLI (APR Stage 1+) at 102K miles that recently had a walnut blast and new Denso plugs at around 101K miles. Swapped coil packs as well and still P303 with EPC light/limp mode.

Skip them, they are junk and a waste of money.

Get a good single platinum plug like the Denso 4511.