Description
Magneti Marelli RT3eV-N3-Q1 car radio for Citroën C4 Picasso (first series). The radio must be programmed and configured to the vehicle using diagnostic tools. Tested, fully functional.
This Magneti Marelli RT3eV-N3-Q1 head unit is an ideal replacement for vehicles equipped with the original RT3 system. Designed to restore factory functionality — radio reception, audio source management and integration with the vehicle’s controls — this unit is often sought by mechanics and DIY enthusiasts by its part numbers (e.g. 96645900XT, 6574CW). The unit requires diagnostic pairing to the car after installation, ensuring correct recognition by the vehicle’s electronics and full operation of steering-wheel controls, display messages and any integrated systems.
Technical Information
- Manufacturer: Magneti Marelli
- Model: RT3eV-N3-Q1
- Product Codes: 96645900XT
- Other Numbers: 6574CW, 6574CX, NFP
Compatibility
Fits Citroën C4 Picasso (First Series). Verify that the original unit uses the RT3 platform and matches one of the listed product codes before proceeding with replacement.
How To Replace
Replacement is straightforward for a professional or an experienced DIYer with basic tools:
- Disconnect the negative battery terminal before starting work.
- Remove dashboard trim panels around the radio using trim tools to avoid damage.
- Unscrew the radio mounting screws and carefully slide the unit out.
- Disconnect the main harness, antenna connector and any amplifier or CAN/data plugs.
- Fit the replacement unit, reconnect all plugs, secure the radio and reassemble trim.
- After mechanical installation, the unit must be programmed and configured to the vehicle with diagnostic equipment (see mounting notes below).
Installation Recommendation
Programming And Coding — Important
- The radio must be programmed/paired to the vehicle using a PSA diagnostic tool so that it is recognized by the car and all integrated functions work correctly.
- Recommended tools: DiagBox / Lexia or equivalent PSA diagnostic equipment for coding and final checks.
- Always disconnect the battery before starting work and follow the vehicle manufacturer’s procedures to prevent damage to the unit or vehicle electronics.
Why This Part Fails Most Often
- Software Corruption: Loss of settings or boot errors can occur after battery disconnects or power surges, requiring reprogramming.
- Component Wear: Age-related failures of internal electronics (capacitors, power supply) or mechanical parts in older units.
- Connector Corrosion Or Poor Contact: Moisture or oxidation at wiring plugs can cause intermittent faults or complete loss of function.
- Physical Damage: Damage during removal/installation or impact/moisture ingress can render the unit inoperative.
Practical Tips
- Search By Part Number: Customers and workshops frequently locate this radio by codes such as 96645900XT or 6574CW — include these numbers when searching or ordering.
- If the original unit showed signs of intermittent operation before replacement, check vehicle power supply and connectors to avoid repeating the fault on the new unit.
- When in doubt about coding procedures, use a workshop with PSA diagnostic experience to ensure full functionality after installation.
