Car Key Remote Control Replacement Housing with 2 Buttons + Blank + Battery Compatible with Vauxhall Corsa D Tigra B Astra H Zafira B Antara: Amazon.de: Electronics & Photo
OPEL - How to replace car key cover - YouTube
ASOOLL Fits for 2 Buttons Keyless Entry Remote Control Replacement Uncut Flip Key Fob VAUXHALL/OPEL Astra H 2004-2009/VAUXHALL/OPEL Zafira B 2005-2013 (Key Shell + Circuit Board +Battery): Amazon.co.uk: Electronics & Photo
How to Change the Battery in a Vauxhall Key Fob - Opel Car Key Battery Replacement Tutorial - YouTube