Opel radios unlocked online — from the serial on the unit, or from the VIN if the radio is still in the dash.
The quick way — the VIN. No tools, nothing to remove: the VIN is on the plate at the base of the windscreen, on the driver-side door pillar, and on your V5C or registration document.
Our VIN table is strongest on European Opel built roughly 1994–2009 — 66,000 German-built cars (VIN starting W0L) — plus GM South America. If your VIN is not in it, nothing is charged.
The certain way — the unit serial. Pull the radio out with a pair of release keys and read the label on the casing: GM1500… on a CDR 500, GM0205… on a CDR 2005, 14 characters in total.
A serial names your exact unit, so it is the answer we trust most. A VIN names the car, and we answer it from the same database — but it is only right while the radio is the one the car left the factory with: a unit swapped at some point in the car's life would give the wrong code. If in doubt, pull the serial.
The serial is on the label on the casing:
GM150010000003
17 characters, no I, O or Q. Windscreen base, door pillar or logbook.
W0L00000131149563