Citroën Radio Code Finder (All Models)

Hello Valued Citroën Owners,

Has your Citroën radio (C3, C4, C5, Berlingo, Nemo, Jumper) locked with a “CODE”, “LOCKED”, or “Security” message after a battery change? You need your 4-digit unlock code.

This guide covers Harman, Philips, Clarion, Blaupunkt, Daiichi, and Continental radio codes for all Citroën models.

If you know your serial number, use our Online Radio Code Finder Service below.

Important: Where is the Serial Number?

To find your Citroën radio code, you must remove the radio unit.

• Use radio removal keys to pull the unit out.
• Locate the label on the casing and note the Barcode or Serial No.

Once you have the serial number, use the calculator tool below.

1. Citroën Harman Series (Starts with T00…)

Common in C3, C4, C5 (Navi units). Serial starts with ‘T00’ or ‘TOO’ (14-15 chars).
Input: Enter the full serial number.

2. Citroën Philips & Clarion Series

Philips Series: Found in older models (Xsara, Berlingo).

Input: DO NOT enter the starting T0. Enter only the last 4 characters (e.g., for T0S123, enter S123).

Clarion Series: Common in C3. Serial starts with ‘C7’ (12 digits).

Input: Enter the full 12 digits (e.g., C70000001234).

3. Citroën Blaupunkt Series (BP, 815… and 905…)

Used in Nemo, Jumper.

• Standard: Starts with ‘BP’. Enter as is.
• Special (Nemo/Jumper): Starts with ‘815’ or ‘905’ (17 digits).
  Attention: Enter the full 17-digit number, including the 815/905 prefix.

4. Citroën Daiichi & Continental Series

Daiichi: 5 digits (e.g., A1234 or 12345).

Continental: Starts with A2C… or A3C…. Enter the full code.

Citroën Radio Code Finder Program;

FAQ About Citroën Radio Codes