i've been calling around to local mechanics, there are about 4 in my area that specialize in lexus and toyota, the first couple i called were around 700 and the last one i called was on recommendation of someone i work with, she said she has been taking her cars to him for years, he quoted me $368 to replace both sensors and the wire, thats tax, parts and labor out the door, i'm thinking he might has mis quoted me but i'll be doing the happy dance if thats really what he is going to charge me, i guess we'll find out on friday.
The MAF sensor can be replaced in 15 minutes. On the RX300, it's located next to the air cleaner box right on top of the ducting that goes to the engine. Just two small phillips head screws hold it on. So the other 3-6 hours of labor is for the knock sensor?
all the time quoted was for just the knock sensors, i cleaned the MAF sensor myself and the code didnt come back, i just went to lexus and told them i wanted the two sensors replaced and thats what they quoted me, she said i could buy the sensors from rockauto.com and they would install those ones i bring in but they wouldnt guarantee the work and they are only charging $170.00 for each sensor so its not that much more than rock auto