A Vauxhall Astra radio code is retrieved from the head unit serial on the casing label, usually starting GM. Enter the serial on this page and the code is supplied 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 Vauxhall Astra 1998 to 2015 (Astra G, H and J).
Bob's never displays a guessed or generated code — if a working code can't be retrieved you get a full refund.
1998 to 2015 (Astra G, H and J). Blaupunkt CDR500, CD30, CD30 MP3, CD70 NAVI, DVD90
How to find the serial number:
Check the handbook wallet for the original code card.
Unclip the trim surround around the head unit by hand.
Remove the four screws or use extraction keys depending on the unit type.
Read the GM serial from the label on the top of the casing.
How to key the code in:
Set each digit with presets 1 to 4.
On CD70 units the arrow keys change the value and OK advances.
Confirm and wait for SAFE to clear.
Worth knowing:
Astra G (1998–2004): CAR2003 and CDR500 Blaupunkt units. Serial on the casing label only.
Astra H (2004–2010): CD30, CD30 MP3 or CD70 NAVI. Double-DIN units sit behind a clipped surround with screws.
Astra J (2010–2015): CD300, CD400 and later touchscreen systems — the earlier ones still use a four-digit code.
CD70 NAVI units also carry a separate navigation DVD region setting, which is unrelated to the radio lock.
Astra G, H and J units
An Astra G has the CAR 300 or CDR 500 in a standard cage. An Astra H is typically a CD30 or CD30 MP3 behind a moulded fascia, and the Astra J moves to the CD400 and CD600 with the split display. All of them can sit behind a code prompt after the battery has been off.
An Astra K with R4.0 IntelliLink does not use an audio code. If your screen reboots and just loses the time, there is nothing to unlock.
Removing the unit
Astra G: four flat keys into the corner slots. Astra H and J: unclip the surround around the radio and vents, then four Torx T20 screws. On an Astra H the top clips of the surround are the ones that break, so lift from the bottom edge and work upward.
Photograph the GM serial from the label. Check every character — a rejected code is almost always a misread serial rather than a bad lookup.
Cost and lockouts
£19.99 here against the serial, refunded in full if no working code can be supplied. A dealer will typically be £25 to £40 plus labour.
If the unit is in a wait period, leave the ignition on so the countdown runs, and do not try further numbers in the meantime.
My Astra shows LOC and a number That is the lockout countdown after failed attempts. Leave the ignition on so the timer runs down — switching off restarts it.
Is the CD70 code the same as the CD30? The entry method differs slightly but both are four-digit codes tied to their own unit serial, so the code from one will not work in the other.
Can I get the code from my Astra's registration? No. The code belongs to the head unit serial, not the car.
How much is a Vauxhall Astra radio code? £19.99 on this page against the head unit serial, with a full refund if no working code can be supplied.
Which Astra radios need a code? CAR 300, CDR 500, CD30, CD400 and CD600 units can all lock after a battery disconnection. R4.0 IntelliLink on the Astra K does not.
Do I have to remove the Astra radio to get the serial? Yes on most models — the serial is on the label on the unit casing, which is only visible once the radio is out of the dash.