Description
Indicator of the automated gearbox mode for Citroën C4 Picasso and C4 Grand Picasso (First Series)
The gear mode indicator for Citroën/Peugeot models is a direct replacement part frequently searched by mechanics and DIY enthusiasts using product codes such as 9660065477, 4131AR and 4131NQ. Designed to restore clear gear selection display and reliable communication with vehicle electronics, this unit improves safety and drivability after a malfunctioning or worn indicator is removed. Ideal for workshop fitment or careful home repair, the description below helps you confirm fitment, understand function and perform a correct replacement.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C4 Picasso, Citroën C4 Grand Picasso (First Series)
- Product Codes: 9660065477, 4131AR, 4131NQ
- Additional Numbers: Common OE cross-references used by Stellantis platforms
Function
This module displays the selected gear or driving mode of the robotized/automated manual transmission to the driver. In many vehicle configurations it also provides signals to the vehicle electronics for gear recognition and safety interlocks (starter lock, shift interlock). A correctly working indicator ensures the driver sees the current mode (e.g. P, R, N, D or sequential positions) and avoids confusion during driving or when starting the vehicle.
Compatibility And Fitment
Fitment is targeted to first-generation Citroën C4 Picasso and C4 Grand Picasso models equipped with the factory robotized/automated transmission. Use the listed product codes (9660065477, 4131AR, 4131NQ) to match the unit to your vehicle. When in doubt, compare the connector and mounting shape with the removed part to ensure correct replacement.
Replacement Procedure
General replacement steps (typical for interior indicator units):
- Park the vehicle on a flat surface, engage the handbrake and place the transmission in a safe position.
- Disconnect the negative battery terminal before starting to avoid electrical damage.
- Remove the surrounding trim panels carefully using appropriate trim tools to avoid damage.
- Unscrew and extract the indicator unit, unplug the electrical connector(s).
- Install the new unit, reconnect the connector(s) and secure all fasteners and trim panels.
- Reconnect the battery and verify correct display of gear positions and full functionality during a short static and low-speed test drive.
Mounting Recommendations
- Always disconnect the battery before removal and installation to prevent short circuits or damage to vehicle electronics.
- Use correct trim removal tools to prevent cracking panels and clips.
- Inspect connectors and wiring for corrosion or damage; clean contacts and repair wiring as needed before fitting the new indicator.
- After installation, verify operation in all gear positions and check for related fault codes with workshop diagnostic tools.
Why This Part Commonly Fails
Common failure causes include wear of internal position sensors or mechanical components, moisture ingress or corrosion at electrical connectors, intermittent contact caused by worn connectors and damage from improper removal or impact. Electrical issues in the vehicle wiring or related transmission actuators can also produce incorrect indications even if the indicator itself appears functional.
Notes For Professionals
This replacement indicator is a practical spare part for workshops maintaining older Citroën C4 Picasso/Grand Picasso vehicles. Using the original product codes (9660065477, 4131AR, 4131NQ) in search and ordering greatly speeds up finding the correct unit. After replacement, a diagnostic scan is recommended to ensure there are no stored faults relating to the transmission or instrument communication.
