It should be in the owner book that is usually sitting in the glove box.
If you can't find the book, call your dealer and ask. You are not obligated to buy it from dealer despite what they tell you.
If you decide to go and get the plugs in internet, make sure that you get it from reputable sellers.
change the plugs at 60,000 miles.
How do you change spark plugs in a 6 cly Toyota Camry?
how to replace spark plugs on 2006 camry LE
You can try to see if you can see the spark plugs, if you can count them, should have one per cylinder. On my 2002 Camry when you open the hood all the way there is a little sticker that tells you the model number of the engine you can match it up with the owner's manual to find out.
To change spark plugs on a 1994 Toyota Camry, remove the black shafts. The spark plugs are down the four holes. Use a socket set with extension to reach the spark plugs. Replace old spark plugs with new ones.
remove upper intake plenum
1342
100-120K miles.
Every 100K or when necessary.
To check the denso spark plugs compatibility with your 2006 Toyota Camry, I would suggest you refer to a garage or a Toyota dealership, in person or online. You always have the option to email them with any concern or information you have on your Camry. Your Toyota dealer is always in the know on their cars and which parts are best suited, even for older models: they remain their models.
It is feeling silly and my other answer is it is behaving badly
97-99 4 cylinder BKR6EKPB-11