Rt3 Upgrade 651 Na 663 Build 890 Can42 New May 2026
The upgrade from version 6.51 to 6.63 Build 890 for the Magneti Marelli RT3 navigation system (found in Peugeot and Citroën vehicles) is the final official software release for the CAN bus (4.2) architecture. Core Enhancements & Performance
Feature Title: Adaptive Synchronous Cruise Control (ASCC) with CAN42 Integration
Associated Upgrade: RT3 v651 → v663 (Build 890) | Module: CAN42 rt3 upgrade 651 na 663 build 890 can42 new
4. Operational Benefits (New)
- Fuel savings: 6–9% on undulating routes due to reduced unnecessary throttle cycling.
- Wheel slip recovery: Cut from 2.1s to 0.7s via predictive adhesion mapping.
- Driver interface: New ASCC indicator (green chevron) on cab display; haptic knob feedback for speed setpoint.
Improved MP3 playback: Faster reading and better file structure support. The upgrade from version 6
: Improved sound quality, better volume control, and updated user interface graphics. CAN-Bus Efficiency Fuel savings: 6–9% on undulating routes due to
- Improved Performance: The 651 NA 663 build 890 Can42 upgrade brings notable performance improvements, enabling faster processing, reduced latency, and enhanced overall system responsiveness.
- Enhanced Security: This upgrade includes critical security patches and updates, ensuring that systems are better equipped to defend against emerging threats and vulnerabilities.
- New Features: The Can42 designation indicates the introduction of new features and functionalities, designed to streamline workflows, improve user experience, and expand the capabilities of RT3.
Upgrade Process
The actual upgrade process may vary depending on the device and its manufacturer. However, here's a general guide:
3. Technical Implications of the Upgrade
A. The "Update Path" (651 $\to$ 663) Moving from version 651 to 663 is not always a direct linear flash. In PSA electronics, firmware updates often require intermediary steps or the use of a "forced update" via the CD changer port (using tools like the PP2000 / Diagbox diagnostic software or a burned firmware CD).

