2016 RX350 Cuation Error on Main screen
Thread Starter
Driver
Joined: Jan 2018
Posts: 59
Likes: 5
From: NY
2016 RX350 Cuation Error on Main screen
Hi All, Have a 2016 RX350 which just popped up a Caution screen saying to Drive Safely and obey traffic rules....etc.
At first glance at the internet, they are talking about the head unit being the issue.
Looking for some more info before going forward. Tried soft reset and also have someone unhooking the battery for a bit to see if can be reset.
Any advice or ideas before going to a dealership?
If these units can be purchased used on ebay or other, where would you look? how do you know that it will solve the problem?
TIA for any details you can provide.
Clarence
At first glance at the internet, they are talking about the head unit being the issue.
Looking for some more info before going forward. Tried soft reset and also have someone unhooking the battery for a bit to see if can be reset.
Any advice or ideas before going to a dealership?
If these units can be purchased used on ebay or other, where would you look? how do you know that it will solve the problem?
TIA for any details you can provide.
Clarence
Thread Starter
Driver
Joined: Jan 2018
Posts: 59
Likes: 5
From: NY
Quick update: Took my RX 350 to a local mechanic—they were able to temporarily get the head unit working after disconnecting and reconnecting the battery. But it stopped again during their test drive.
They called the dealership and were told it needs a mandatory software upgrade that can only be done at the dealer.
Just wondering—does that sound accurate to anyone here? Any idea on cost, or whether there are alternative ways to do the upgrade outside of the dealership?
TIA
They called the dealership and were told it needs a mandatory software upgrade that can only be done at the dealer.
Just wondering—does that sound accurate to anyone here? Any idea on cost, or whether there are alternative ways to do the upgrade outside of the dealership?
TIA
10th Gear
Joined: Jan 2018
Posts: 11
Likes: 1
From: GA
If it is the same update I did in March, that’s what stealersips like to say.
Files are available on Lexus download site once you register a login.
You download files to a USB flash drive.
As long as the display functions you are able to upgrade firmware yourself by navigating the menus.
Be sure the drive is plugged into a USB port under the console armrest not under the stereo.
Files are available on Lexus download site once you register a login.
You download files to a USB flash drive.
As long as the display functions you are able to upgrade firmware yourself by navigating the menus.
Be sure the drive is plugged into a USB port under the console armrest not under the stereo.
Last edited by galexman; Jul 2, 2025 at 04:44 AM.
Thread Starter
Driver
Joined: Jan 2018
Posts: 59
Likes: 5
From: NY
Thanks for that information. Lexus corporate sent me a link l, but it seemed to be an update from Nov 2016.
Can youbshare the name of the update you used and the date it was issued?
Can youbshare the name of the update you used and the date it was issued?
If it is the same update I did in March, that’s what stealersips like to say.
Files are available on Lexus download site once you register a login.
You download files to a USB flash drive.
As long as the display functions you are able to upgrade firmware yourself by navigating the menus.
Be sure the drive is plugged into a USB port under the console armrest not under the stereo.
https://youtu.be/L7M7cLdE00Y?si=MNyb3UqgmukYO-Ee
Files are available on Lexus download site once you register a login.
You download files to a USB flash drive.
As long as the display functions you are able to upgrade firmware yourself by navigating the menus.
Be sure the drive is plugged into a USB port under the console armrest not under the stereo.
https://youtu.be/L7M7cLdE00Y?si=MNyb3UqgmukYO-Ee
10th Gear
Joined: Jan 2018
Posts: 11
Likes: 1
From: GA
the video has the steps.
I don’t recall prior versus updated version I applied to my 21 450h.
10th Gear
Joined: Jan 2018
Posts: 11
Likes: 1
From: GA
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Thread Starter
Driver
Joined: Jan 2018
Posts: 59
Likes: 5
From: NY
Checked with a local Hi end Car Audio guy and he said he looked into it and did not find any options other then the factory radio replacement.
Found a company called Beat Sonic that says their unit require Bluetooth audio to be working on the factory radio, so this would not work either.
I would be happy with Carplay/Android Auto setup if possible, but would not want to lose backup camera or other features.
Is it possible to confirm the part and purchase from another dealer out of state cheaper and have local dealer install? I did this for my warranty with my LS back in 2018.
Hopefully someone can provide options that make sense.
TIA
Last edited by clarence88; Jul 10, 2025 at 12:37 PM.
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