A Citroen C3 radio code comes from the head unit serial on the casing label, often starting C, RD or VDO. Enter the serial on this page and the code is retrieved for £19.99, refunded in full if no working code can be supplied.
Radio codes belong to the head unit serial number, not the vehicle registration or VIN.
A flat battery, battery replacement or radio removal is what triggers the code prompt.
Covers Citroën C3 2002 to present.
Bob's never displays a guessed or generated code — if a working code can't be retrieved you get a full refund.
2002 to present. Clarion RD3, RD4, RD45, touchscreen
How to find the serial number:
Check the handbook wallet and service book for the code card.
Unclip the trim surround around the unit.
Use extraction keys on single-DIN units or remove the four screws on double-DIN units.
Read the serial from the label, prefix letters included.
How to key the code in:
Presets 1 to 4 set the four digits.
Hold OK to submit on RD4 units.
The radio confirms and resumes.
Worth knowing:
2002–2009: Clarion RD3 units with a pull-out CD slot. Serial on the casing label.
2009–2016: RD4 or RD45 units, usually double-DIN behind a clipped surround.
2016 on: touchscreen systems, vehicle-coded rather than audio-code locked.
The C3 trim surround unclips by hand — take it off rather than levering on the radio fascia.
Which C3 units lock
C3s with the RD4, RD45 or the older Clarion and VDO head units will show CODE or four dashes after a battery disconnection. Cars with the 7-inch touchscreen and Citroen Connect are vehicle-coded and do not lock.
A flat battery on a C3 is a common trigger — these cars are frequently used for short urban journeys, which is exactly the pattern that kills a battery and leaves the radio asking for its code.
Removal
Older C3s take two U-shaped keys either side of the unit. Later cars have the radio behind a clipped surround with Torx screws — remove the surround in one piece, starting at the bottom corner, because the upper clips snap first.
Record the full serial including the leading letters and photograph the label. The common misreads on a Citroen label are 5 against S and 8 against B.
Cost and lockout advice
£19.99 here, refunded in full if no working code can be supplied. A Citroen dealer usually charges £25 to £40 for the lookup before labour.
If the unit is counting down, leave the ignition in position II so the timer runs and stop entering numbers — each attempt extends the wait.
My C3 radio says CODE after a battery change That is expected on RD3 and RD4 units. Losing permanent live triggers the anti-theft lock and the code has to be re-entered.
Where is the C3 radio serial? On the label on the top or side of the head unit casing. Citroën units do not usually display it on screen.
Can I get the code from the registration? No. It is held against the head unit serial, not the vehicle.
How much is a Citroen C3 radio code? £19.99 on this page against the head unit serial, with a full refund if no working code can be supplied.
Where is the serial on a C3 radio? On the label on the top or side of the head unit casing, usually starting C, RD or VDO. The unit has to come out of the dash.
Does a C3 with Citroen Connect need a code? No. The touchscreen systems are coded to the vehicle and do not ask for a four-digit audio code.