PSA NAC RCC Updates

This is the Connected NAV system.
Main Features: It is a fully integrated Telematics System featuring CarPlay, Android Auto, Real Time Services, Voice Commands, High-Res Display, 3D Navigation, Bluetooth Hands Free & USB. 2 versions of the system are available NAC (Navigation Audio Connectée) and RCC (Radio Couleur Connectée) or Connected Colour Radio, which does not have the Integrated Navigation or Live Services.
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rui_saraiva
Posts: 88
Joined: 15 Feb 2023, 10:31
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Re: PSA NAC RCC Updates

Unread post by rui_saraiva »

@Hank_Marvin: As I wrote, you cannot update the firmware. The system that generates/verifies the license keys, needed to install any firmware, is the same that identifies your car as NAC_EUR_WAVE3 - it fails immediately when you try to generate/verify a license for a NAC_EUR_WAVE4 firmware.
Regards,
Rui Saraiva
All NAC, RCC, AIO & RCE updates: https://sites.google.com/view/nac-rcc
Hank_Marvin
Posts: 5
Joined: 08 Feb 2026, 20:45

Re: PSA NAC RCC Updates

Unread post by Hank_Marvin »

Oh I see, so just a waiting game for Stalantis/Citroen to fix it?
Roger971
Posts: 3
Joined: Yesterday, 13:37

Re: PSA NAC RCC Updates

Unread post by Roger971 »

Good morning,
Excuse my English. For a few days now, the My Citroen app has been notifying me that a new update (44-07-33-42) has been released for the NAC on my Citroen C4 Cactus (2018), after a long delay.
Once downloaded to the USB drive, the car's USB doesn't recognize it. No message is displayed.
I hope you can give me some suggestions. Thanks.
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Screenshot 2026-07-18 120859.png
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rui_saraiva
Posts: 88
Joined: 15 Feb 2023, 10:31
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Re: PSA NAC RCC Updates

Unread post by rui_saraiva »

@Roger971: From the screenshot it's the firmware version 42.03.33.42_NAC-r0, the one that converts NAC_EUR_WAVE3 to NAC_EUR_WAVE4 - so you have/had a NAC_EUR_WAVE3 from the factory. What is your current firmware version?
Regards,
Rui Saraiva
All NAC, RCC, AIO & RCE updates: https://sites.google.com/view/nac-rcc
Roger971
Posts: 3
Joined: Yesterday, 13:37

Re: PSA NAC RCC Updates

Unread post by Roger971 »

rui_saraiva wrote: Yesterday, 15:44 @Roger971: From the screenshot it's the firmware version 42.03.33.42_NAC-r0, the one that converts NAC_EUR_WAVE3 to NAC_EUR_WAVE4 - so you have/had a NAC_EUR_WAVE3 from the factory. What is your current firmware version?
this one, thanks for the reply
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WhatsApp Image 2026-07-21 at 16.51.57.jpeg
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rui_saraiva
Posts: 88
Joined: 15 Feb 2023, 10:31
x 46

Re: PSA NAC RCC Updates

Unread post by rui_saraiva »

@Roger971: You already have the latest firmware version, ignore Citroën Update.
Regards,
Rui Saraiva
All NAC, RCC, AIO & RCE updates: https://sites.google.com/view/nac-rcc
Roger971
Posts: 3
Joined: Yesterday, 13:37

Re: PSA NAC RCC Updates

Unread post by Roger971 »

rui_saraiva wrote: Yesterday, 16:16 @Roger971: You already have the latest firmware version, ignore Citroën Update.
I thought so, thanks