PSA NAC RCC Updates

[rui_saraiva]

If your system is identified as a NAC_EUR_WAVE4, you can only install software for that system - only the files at https://sites.google.com/view/nac-rcc/system/nac/wave-4

Since 04 Feb 2026 (see https://sites.google.com/view/nac-rcc/changelog ), the latest firmware version for that system, 44.07.33.32_NAC-r0 with 6 312 210 432 bytes, was re-uploaded to extend the validity of the internal signing certificate. But they messed up (again) and that file will fail during the installation with the generic "Version not compatible with hardware" error. And that file is precisely the one offered by the DS/Citroën/Opel/Peugeot/Vauxhall Update software to anyone that has a NAC_EUR_WAVE4 system. So you can't use the official update software and must prepare the USB flash drive manually.

Download the 44.07.33.32_NAC-r0 firmware version on my site (6 312 212 480 bytes, the "old" valid version, that they still have in their servers) and the license for that version (UpdateID/MediaVersion 001315031692686757). You can only install the 17.0.0-r0 map after successfully install the 4x.xx.xx.xx firmware.

[fenek96]

Hey, this time it worked. Indeed, combining the version from your link with the certificates and license from the version downloaded via Peugeot Update allowed me to update the software to the latest version. Thanks so much for your help.

[Solarriors]

I am confused about the latest version numbers ?
In some places I see:
Software (21.08.90.52_NAC-r0), yours are 44+
Map (28.0.0-r0), yours are 17+

My Unit is a 1.5bHDi C4GST Shine from 2022

[rui_saraiva]

@Solarriors:
There are different hardware revisions (Wave levels) for the same infotainment system, you have a NAC Wave 2 (NAC_EUR_WAVE2).

[Solarriors]

Thank you for your answer.
Shouldn't I have a Wave 4 revision since my car is from 2022 ?
The lower right scroll on the wheel has lost its function of zooming in and out, is it normal ?

By the way, is there a way to :
- Change the background theme color to full black/image ?
- remove the A/C temp info on the 7" while on Android Auto (loses a few pixels of screen estate), and put it on the 12" status bar, as it was in the SMEG+v2.
- Put Android Auto in full screen and/or send the image on the second half of the 12" screen ?

[Keepchill]

Currently living in New Zealand. Just bought 2018 citroen c3 japan imported. Today updated the unit through the citroen windows app. But I still couldn't get the android auto working.

My VIN is VF7**************[VIN obfuscated, can be read by forum staff]

Can someone help me?

[rui_saraiva]

@Solarriors: The same vehicle can have different infotainment systems, depending on trim level or optional features. For that time, it was common to use the RCC Wave 3, NAC Wave 2 and NAC Wave 4 - respectively without navigation, with navigation but a smaller screen, and with navigation and a larger screen.
CarPlay/Android Auto can only be shown on the touchscreen and has a fixed 800x363 resolution (see https://developer.groupe-psa.io/webport ... creen-size ), so the top and lower bars are always present. It might be possible to enable more themes/colours, but it requires telecoding (through the OBD port).

@Keepchill: That's the latest firmware version for the RCC Wave 2 (RCC_EU_W2) system - see the tooltip to compare the HMI/iMX/V850 versions. In the previous screen you should see a "System version: 076x", and that "x" could be a letter "A" to "D". The "A" and "B" hardware variants doesn't have the MirrorLink, Apple CarPlay or Google Android Auto support - see viewtopic.php?p=861471#p861471
If you have a "C" or "D" hardware variant and the CarPlay/Android Auto icons are greyed out or not present, it needs telecoding to enable them. With that RCC systems, it is always required to use a good quality USB cable (or a wireless dongle/adapter).

[wentylxpompa]

If your system is identified as a NAC_EUR_WAVE4, you can only install software for that system - only the files at https://sites.google.com/view/nac-rcc/system/nac/wave-4

Since 04 Feb 2026 (see https://sites.google.com/view/nac-rcc/changelog ), the latest firmware version for that system, 44.07.33.32_NAC-r0 with 6 312 210 432 bytes, was re-uploaded to extend the validity of the internal signing certificate. But they messed up (again) and that file will fail during the installation with the generic "Version not compatible with hardware" error. And that file is precisely the one offered by the DS/Citroën/Opel/Peugeot/Vauxhall Update software to anyone that has a NAC_EUR_WAVE4 system. So you can't use the official update software and must prepare the USB flash drive manually.

Download the 44.07.33.32_NAC-r0 firmware version on my site (6 312 212 480 bytes, the "old" valid version, that they still have in their servers) and the license for that version (UpdateID/MediaVersion 001315031692686757). You can only install the 17.0.0-r0 map after successfully install the 4x.xx.xx.xx firmware.

Hello master, i have also 31.09.46.62_NAC-r0 version but Peugeot Update software does not give me any update (only maps) when typing VIN.
Typing VIN in your tool gives NAC_EUR_WAVE4.
I downloaded 44.07.33.32_NAC-r0 f(6 312 212 480 bytes) and the license for that version (UpdateID/MediaVersion 001315031692686757), extracted to pendrive 32gb fat32, license file in license folder. In car it gives Version not compatible with hardware. Please can you help me?

VIN: VR3**************[VIN obfuscated, can be read by forum staff]
NAC ID: 0D010D1AC9D4EE68B421

[rui_saraiva]

@wentylxpompa:
That seems to be a problem with the key/license. Connect your car to a WiFi network before starting the installation, to verify the license online.

[wentylxpompa]

@wentylxpompa:
That seems to be a problem with the key/license. Connect your car to a WiFi network before starting the installation, to verify the license online.

Thanks for answer,
I connected IT to my phone hotspot with internet connection, does not work. I tried other pendrive, i tried reset with holding phone button, no more ideas

[Solarriors]

@Solarriors: The same vehicle can have different infotainment systems, depending on trim level or optional features. For that time, it was common to use the RCC Wave 3, NAC Wave 2 and NAC Wave 4 - respectively without navigation, with navigation but a smaller screen, and with navigation and a larger screen.
CarPlay/Android Auto can only be shown on the touchscreen and has a fixed 800x363 resolution (see https://developer.groupe-psa.io/webport ... creen-size ), so the top and lower bars are always present. It might be possible to enable more themes/colours, but it requires telecoding (through the OBD port).

Hello Mister Saraiva, thank you for your answer.
Is there any C4 Grand Spacetourer equipped with the NAC Wave 4 (HD) ?

It's maybe not exactly related to updates but there is a firmware feature difference. In my C4GP, the bottom right scroll on the wheel, where the "SRC" button is, seems to have no functionality anymore. It used to be for fast settings the navigation, and zoom on the map.

I was thinking maybe a developer could push an update to the firmware:
- Move the top and bottom state info of the 7" screen to the 12" screen status bar as before.
- Put Android in full screen mode in the 7" screen
- Send the Android Auto on the 2/3 on the 12" screen.

If not already possible somehow, some of the features are already present and other go a long way for comfort and convenience. I sent an email to Stellantis devs.

[rui_saraiva]

@Solarriors: Stellantis didn't develop the firmware (it was Continental) for those NAC systems, that are already obsolete. It won't happen.
Even when those systems were actively supported, the firmware updates only fixed bugs and never added new features. And the digital panel has its own firmware.

[wentylxpompa]

@wentylxpompa:
That seems to be a problem with the key/license. Connect your car to a WiFi network before starting the installation, to verify the license online.

Please can you help me? Connecting car to internet does not solve problem.

I have 31.09.46.62_NAC-r0 version but Peugeot Update software does not give me any update (only maps) when typing VIN.
Typing VIN in your tool gives NAC_EUR_WAVE4.
I downloaded 44.07.33.32_NAC-r0 f(6 312 212 480 bytes) and the license for that version (UpdateID/MediaVersion 001315031692686757), extracted to pendrive 32gb fat32, license file in license folder. In car it gives Version not compatible with hardware.

[Solarriors]

In the software world, I've seen things getting updated, even long after people thought they were abandoned.
And what about this:
In my C4GP, the bottom right scroll on the wheel, where the "SRC" button is, seems to have no functionality anymore. It used to be for fast settings the navigation and zoom on the map.

[Pa-Peu3008]

I checked my VIN on https://sites.google.com/view/nac-rcc/ and found that the car comes with an RCC_EU_W3_ECO infotainment system from the factory. Is it possible to upgrade to the NAC_EUR_WAVE4 system?