the answer is elsewhere on this site. it appears that 3 of the plugs are on the back of the engine and you have to jack up the car to get to them....
How do you change the spark plugs in 2001 lexus rx300?
go to this site www.mkiv.com-techarticles-spark_plugs-na-6.jpg
Change spark plugs on 1999 Lexus GS300?
After you take the cover off the engine there are three square electrical looking things and when you unscrew all those and take them out the spark plugs lie beneth there.
how would you go about changing the spark plugs in a 1999 Lexus ES 300?
There are six(6) spark plugs to require to change for the IS300. Not as easy to change.
send it to the garage
yes please
that he must remove to get to spark plug rear of the cylinders
need to change all the plugs, change cap and rotor, change air filter, also probably change distributor wires
It willrun $450.00 and change plugs are 240.00 labor plus parts