I will let you know next Friday if I was able to get flashed to build 2170. My Rz is build 2050.

 

Me RZ executive had an update last Friday together with a first maintenance check. All was fine, the build version is still on 2050 but now I do have the battery percentage and the difference between with and without A/C in the app is only 13 km (324 / 311 at 88% battery level). I did not drive much since I was in the garage, let's see what happens after a longer drive and charging. I asked Lexus to activate the option to open and close the windows with the key, that works now.

 

I recently got my new RZ and the dealer told me that there was a new update which should increase the range by about 30-50 km along with some other small changes and improvements.
After a few days I noticed that the battery % was nowhere to be seen on the car so I called the dealer to ask and he then told me it should be visible due to the latest update. But in my car it wasn't... He then called me back later to tell me that the update apparently was only done for the Business and Executive Line but not yet for the Privilege Line. He had no information when this update would come...

Does anyone here have any more information about the future update? Pretty strange to me that they don't update the different lines at the same time?

That's really strange. I would hope you could get the update, giving you the battery % display, regardless of trim. My dealer has never mentioned a word about an update that provides more range, though I got the % update to the display. Maybe a gimmick? IDK. I would call another Lexus dealer, if you have another near you.

 

My Lexus dealership e-mailed me this
"OTA updates for our Lexus Interface models are rolled out in “waves” rather than distributed everywhere simultaneously. I’ve attached 2 pics showing the software version (2170) that does show the SOC% within the on-screen dashboard image (see images). If your software version is lower than 2170, that would explain the “missing” SOC% graphic. If you want to bring your vehicle in so we can determine if a flash-forced update is available for your vehicle, you can set up an appointment with our Service Department.

"

I am going to call them tomorrow to schedule my appointment.

 

Not sure if this applies but here in the UK the Premium Plus line doesn't have it either and Belfast Lexus has said that it's not been rolled out to Heads Up Display models due to an issue it bricks the display. that is a full dash out to replace so all upgrades are restricted to those models without Heads Up Display until Lexus fixes the issue

 

I guess the Premium Plus Line is the same as the Privilege Line then? Explains why I have not received the update yet. Hope they find the fix soon though...
Sidenote: always wondered why Toyota/Lexus use different names for the different "Lines" in some countries

 

I think the originally released update has been ‘improved by the IT experts’ and it is trashing the HUD. My concern is that it works very well in my car so I have to guard against the dealer (or maybe an OTA) update winding it back !

 

Doesn’t the Luxury have the facility to make the panoramic roof opaque ?

 

yes, there is the electrically operated panoramic roof shade in the Luxury trim.

 

That doesn't make sense to me either, but I'm not a Lexus employee.

 

It’s interesting that Lexus is putting at least some effort into updating the software in the UK. As far as I know no one in the US has been able to get any kind of updates regardless of which specific model they have.

 

As seems to be normal in the IT world, they must have tinkered with the original version of the range update. My car has had it and the HUD and everything is fine since. The update was months ago, hence why I think they must have fairly recently tinkered with it.

 

My US 2023 RZ Luxury came with the battery % level, so already updated?

OTA software updatable, but seems like the old software development style. I look forward to seeing what Lexus decides to update and when.

 

Where do you see your battery percent level? Mine is a 2023 also but are you in the US? All mine will show is the mileage that is left. When I spoke to Lexus they said that there is no update for the US market and that all the cars are different specs for different regions. I don’t understand why Lexus would completely disregard the US market but give it to everyone else.

 

I was able to schedule my service today. There was no update.
My car is still on build 2050.

I got an email from the tech advisor at my local Lexus dealership sharing information from a tech forum for Lexus service and dealership. On the email it states that there is a TISB that the update is only for the BZ4X. Some Rz say it is available but the TISB advises not to update yet. The techs speculated that it may come down in the future.

 

I was able to schedule my service today. There was no update.
My car is still on build 2050.

I got an email from the tech advisor at my local Lexus dealership sharing information from a tech forum for Lexus service and dealership. On the email it states that there is a TISB that the update is only for the BZ4X. Some Rz say it is available but the TISB advises not to update yet. The techs speculated that it may come down in the future.

So why do some RZ already have the update but others don't? Doesn't really make sense does it?
I'll try to get some more information through my Toyota Motor contact

 

Use bZ4X for beta testing. Nice.

 

In the UK, the bz’s had the update months before the RZ. it looks like the bz doesn’t have the HUD so that seems to confirm the issue is to do with the HUD

 

No luck yet here either.
Anyone else In the USA get the firmware update with the battery percentage?
(I have the 2023 Premium trim)

 

The update should be available to all now. I just got mine last week at the dealer. It took a few hours to complete.

 

nope. not holding my breath.

 

I'll add to the confusion. My US 2024 RZ450e Premium with HUD and a 12/23 build date (driver door frame sticker), delivered 3/14/24, came with software version 2170 and the battery % level. I'm pretty sure my dealer didn't upgrade anything. So it looks like US cars have been getting the upgrade from the factory since at least 12/23.

By the way, I'm pleasantly surprised with my RZ's range since we bought it mainly for it's styling and 20" wheels. Getting approximately 200 miles per 80% charge. I'm not running to zero, that's actual plus estimated remaining miles.

 

I wonder how you got that since I have a 2023 premium also. Are the dealers just picking and choosing who to update and who not to?

 

So looks like the only ones not getting the update anytime soon is the 2023 450e premium
After asking the Lexus tech in Los Angeles.
Unless anyone has an update?

 

Does the 2023 Premium have the HUD ? Here in the UK it doesn’t. Lexus IT fiddled with the update after it was first issued and it crashed all the HUD’s. It was so bad that the affected cars had to have the whole dash removed to replace the HUD - guaranteed to bring creaks and groans. It took Lexus months to sort the problem, but I believe it was sorted.
My May 2023 car was one of the first to have it and it installed well and hasn’t created any problems.
I‘m suggesting this as you said it was a 2023 model - the initial version of the update came in the UK in Feb 24 and all 2024 cars came with it installed.

 

Mine 2023 Premium has the HUD.

 

2023 brochure

 

I wonder if I can order the Acoustic glass and replace it on my Premium?
or would the door cards be different?

 

Just reading through these older posts, I'm assuming everyone now has this update. I have the RZ 450E Luxury version here in the US. I had the update performed in May'25. It was called "25LCO3". It now shows the battery percentage and I appear to be getting a higher Mile/KW. Before I could get as high as 3.1, now I routinely get 3.6. I do not put a lot of highway miles on the car, as most of my driving is around town. Did notice Lexus is coming out with more efficient battery technology for 2026 and appears to be on track to start delivering solid state batteries by 2027-2028. This will be a "game changer" for the automotive world.

 

Welcome to the forum, @bwarren. What part of the country are you in?

The warmer temperatures can account for differences in efficiency even with AC usage. I don't think there would have been significant efficiency changes in the firmware update. I have heard of buffer protection level changes as well as better range estimates, but you have the mi/kWh for your type of driving so you should have a better idea than your car how far you can go.

 

Well, I just got the update on my premium.

There is only a 3 mile difference with or without economy AC on instead of the usual 30 mile difference. I will see how it behaves over the next couple of weeks if usable range is and how accurate. When I drove home from the dealership that was 8 miles away it went from 48% to 47%. I wish I can see remaining kWh.