According to the Lexus 2004 New Car Features Manual
Standard Stereo
Tweeters 3.5 cm, 4 ohms, 21 watts/50 watts max
Squawkers 6.5 cm, 4 ohms, 21 watts/50 watts max
Mark Levinson
Tweeters 2 cm, 8 ohms
Squawkers 6.5 cm, 8 ohms
it does not list power ratings for individual ML speakers, just a total output of 240 watts
Aloha, Joe