Jack Wolff

If you go to Advance Auto (or another store), they will test your battery & alternator for free.

My 2012 RX had a recall for a leaking timing belt cover @ the identical mileage. I doubt that Lexus fixed this issue on later models.

Ask dealership for free upgrade.

RX-350 was only produced w/ 3.5 liter 6-cyl engine.

If you have Sirius, it is on your account page. 

If the car starts, programming should be OK. So, the problem is either the battery or the fob antenna. 2025 battery, plus side up. both connections should be checked; the sliver of metal pressing on the bottom can get pressed down & needs to be pried-up(carefully). Otherwise, likely defective antenna.

Cargo net is in a long case & likely with the spare tire. 2016-2021 are similar. Before that, it was2010-2015.

I spent 3-4 days setting up my wife's 2016 RX. I did not read the 900 page Owner's Manuel. You have listed several more options we don't have or want. We definitely like Blindside Monitor & Cross Traffic Alert & Lane Departure Alert. 

It is very simple which you will see(15 min). There is an important screw to remove a clamp behind the molding. I can only refer to the rear molding.

Highly recommend Lift Supports on Ebay.

Contact Sirius directly. They want your subscription & are glad to offer the trial.

Lower or raise the temperature set point.

That Service Bulletin was issued in Feb 2017 for 2016-7 RX's & extends the Warranty Repair for 8 years or 80,000 mi....only if you have "Hesitation Concerns." 

Charles, when did you receive notification from Lexus on your 2016 RX ?

If you will go the Lexus Owner's website(and register), you can order a free replacement.

eBay is a great place for non-working auto parts replacements. I have purchased several center wheel caps w/ no problems(USA sellers).

Replacement covers are available on eBay for $20. 2007-2009 only.