1.33L (1NR-FE engine) current spark plug recommendation.
I'm contemplating replacing the plugs on my 9yr old (58k miles) 2010 Auris that has the 1.33L engine with Stop/Start. The handbook lists Denso SC20HR11 as original fitment, however the Denso site indicates that these are now obsolete and replaced by SC16HR11. In the past there seems to have been a bit of confusion, however I have just found this which although relating to the Prius is still the same plug:
Source:
https://priuschat.com/threads/gen-3-prius-spark-plugs-superceded-with-hot
Having tried ordering from a few UK based suppliers and getting the 'in stock' status initially, it seemed that when ordering they had less than four. I bit the bullet and bought from Mr T. These are the later specced (hotter heat range) SC16HR11's, the originals were the SC20HR11's
It must be 30 years since I last changed a set of plugs and tbh I wondered how hard these might be to remove, particularly as they had been in there for 9 years... well I needn't have worried, in fact I could
