I bought one from Ebay seller stonegateauto, works like a charm and $166.25

 

So after you take off the 2 visible bolts that bolt it head on what else needs to come off. I too am avoiding the dealership costs of $959 for a Battery and Alternator. I took off the two front facing bolts (One long One Short) then a top side bolt and I cannot get it lose. This is a new car for me, I am stuck! 2006 IS 350

 

Look at your replacement it should be obvious if you got all of the attachment points or not. If you have all the bolts off then hitting it with a rubber mallet will probably do it. Just don't forget the wiring... obviously.

 

If it's mounted like the 3GR-FSE, there's a bracket behind the alternator, towards the bottom.. You have to get your hand deep in there to feel it. You have the takes the nuts off to remove the alternator

 

get that nut with a swivel head on the long ratchet

 

***Update***
First and foremost Thankyou for going easy on me for asking a question that was so nicely explained in all the previous posts! In the end it was the nut on the back of the Alternator (bracket) that was hanging me up. I'm 6'7 so leaning of the fender with my Shrek Hands was kicking my butt , but I got it out and in fact needed to use a rubber mallet to assist. So I again want to thank everyone for the good advice. I also (after joining the site) was made aware that my 2006 IS 350 did NOT have the Cam Recall completed and utilized the information provided by previous posters and had the Plugs and Wires replaced at cost ($114 with tax, Mn). I have already benefited greatly from simply joining this forum. I appreciate all your guys post's and time. I am sitting at around 95,000 miles and I'm unsure of what other useful preventive maintenance items I might want to be aware of moving forward in milage. Only negative I have 22 days in ownership of this Lexus is the traction control cutting out power to the wheel's when pulling out from any slightly slippery conditions. Other than that I was given a 2014 Lexus GS 350 for a loaner while mine was having warranty work done. Very Nice car, lots of options. Not sure if all the Lexus dealerships do this but they filled my gas tank 100% Full after the warranty work, I was told to bring my car in on fumes, lol
Thanks again.

 

They will fill your tank if it is a safety recall being done but usually not for warranty work, at least they never added gas for any warranty work I had done while I was still in that blissful state of ownership.

 

You are right I miss spoke. For the "Safety Recall". Not "Warrenty" work. I don't want to put inaccurate information out there! Thanks Again.

 

yes I had the same issues I have the same year and model Lexus but I have awd anyways I took my car to a mechanic and was told 1000 bucks so I YouTube on how to switch out the alternator its a tricky ***** but can be done especially the third screw its long painful process but can be done good luck.