Lexus 2007 ES350 Do I need a memory saver when changing out with new battery?

SOURCE: How Do we open the ES350(08" model) with a flat battery

The plastic cover (on the right hand side on the driver's door) on the door handle comes off and the key opening is under the cap.

SOURCE: How do I replace the cabin air filter for a 2007

the cabin filter is locate on the passanger in the glove box. to get to it u must remove the shelf in the glove box by simply tugging it from the left side, then u will see at the back of the glove box a section that u can remove. once removed u will see a white compartment with a removable front, remove that and youll see filter

SOURCE: 2007 es350 lexus. stopped for gas. when ready to

most likely your key battery needs to be replaced. due to the involvment of the key, it uses alot more battery power then older cars and the battery should be replaced every year. hope that helps.

SOURCE: 2007 Lexus 350 - How to change the air filter

Jim , you can change both the air and cabin air filters. There are a series off pop pins covering the air intake. If you depress the center button with a BIC pen tip and then lift at the side they will pop up. They are a plastic spring load so be gentle.
Underneath you will find the intake housing and filter. Cabin air filter should be behind the glove box area I
believe .
FYI , Lexus has a patented high volume oil filter. If you change your own , stcik with genuine for longer life, unless you are certain the aftermarket matches

SOURCE: my lexus key is not detected after replacing ES350

The ES350 battery should have been under warranty, so this should be done at a dealership who would in turn check your keys....You will likely have to return to a Lexus dealership with both master keys and have them reprogrammed, however try holding the key directly to the dsh beside the ignition switch for about ten seconds, then push the ignition button.