Citroën C3 Radio Code: How to Retrieve Your Stereo Unlock Code

The Citroën C3 is a popular supermini across the UK and Europe. After a battery change or power interruption, the original head unit locks and displays CODE. This guide explains how to retrieve your Citroën C3 radio code quickly and without a trip to the dealer.

Head Unit Types in the Citroën C3

• C3 I (2002–2010): RD3 (Clarion) or RD4 (Siemens VDO)
• C3 II (2009–2016): RD4, RD45, or RD5
• C3 III (2016–present): DAB radio, touchscreen infotainment — no traditional code

Finding the Serial Number

The Citroën C3 shares its PSA Group platform with the Peugeot 207. The serial number (sometimes called the C7 barcode) can be found in two ways:

Via the Display

1. Turn the ignition on and switch the radio on.
2. The display shows CODE.
3. Hold buttons 1 and 4 simultaneously (RD3/RD4), or 2 and 5 (RD45/RD5).
4. The serial number scrolls across the display.

Via the Label

Remove the radio using DIN release keys and read the serial number from the sticker on the casing.

Retrieving and Entering the Code

1. Go to RadioCodeLookup.com/brands/citroen.
2. Enter the serial number.
3. Receive your four-digit Citroën C3 radio code.
4. Enter the code using preset buttons 1–4 and confirm with the right arrow button.

Frequently Asked Questions

My C3 display shows dashes rather than CODE. What now?

Press any preset button briefly. The display should switch into code-entry mode.

Does the C3 Pluriel use the same radio code method?

Yes. The Citroën C3 Pluriel uses the same radio systems and the same retrieval method.

Can I get the Citroën C3 radio code from a dealer for free?

Some dealers provide the code free of charge if you purchased the car from them. Otherwise, you will typically be charged £30–£60. Via RadioCodeLookup.com it is faster and more affordable.