This item was removed from a used Toyota iQ GRMN (limited to 100 units) with 105,000km on it. Wiring modifications (including connectors) to the vehicle body will likely be necessary, so installation should be handled by someone with knowledge or a professional. There is a connector at the bottom of the meter. Since the GRMN has a 4-cylinder engine, it likely cannot be used as-is with 3-cylinder or other engine configurations. I am also a novice, so I do not know the details of the installation and cannot respond to inquiries or complaints. Thank you.