Iridium Spark Plugs SC20HR11 90919-01253 3444 Fits for Toyota Lexus Scion Pack of 4

These spark plugs are most commonly used by various Nissans and Infinitis. I have a Nissan Note DIG-S. It has a 3 cylinder Miller Cycle engine with a tiny supercharger. The OEM spark plugs are almost identical to these. Same gap, but different heat range. These are actually slightly hotter with a HR of 6, while the OEMs are HR 7. This should not be an issue for me, since I do not drive my car in any way that would generate high operating heat for a prolonged period of time. All my research supports this position. That said, the OEM plugs cost about 3 times what this costs because the Note DIG-S and its closely related cousin the Nissan Micra DIG-S are the only cars in the world that use that particular plug. Needless to say they are not widely available and when they are, thou ey are at great cost. Most DIG-S owners will go for this plug as an option instead. They seem to work pretty well with no hesitation and with smooth idle. DIYers new to spark plug change or more seasoned DIYers who are new to Iridium spark plugs should remember that these plugs cannot be gapped. the correct gap must be purchased since trying to adjust will almost certainly cause damage to the electrodes. The only concern I have is that these come in a box of four, while my car will only need three. Oh well...after the third spark plug change I will have a complete set for the fourth! Of course we are talking about 400,000 miles down the road or so...The Verdict: You cannot go wrong with NGK plugs. These are some of, if not the best, spark plugs on the market today. The price that these are being sold for represent excellent value.

This were OME replacement for the BMW X3. They are gas saving and performance enhancing plugs they are great plug.

My daughter's 2009 Scion XB hit 90,000 miles so I decided to give it a tune-up. These spark plugs fit fine and the car is running smooth. Not sure if they work better or worse than the OEM spark plugs. But these plugs have the car starting up right away and running fine.