How to remove Toyota Corolla radio?

In a current-generation Corolla you need trim removal tools (which are easy to purchase at any local parts store, or via the Internet). Start by levering the top right corner of the radio fascia piece outwards from the dash. It is retained by plastic clips that simply pop out so don't be afraid to give it some oomph. Once you have it loose you can unplug the wires attached to the back of it. There are then four 10mm bolts holding the radio unit to the dashboard, positioned around the top and sides, towards the rear of the unit. Use a long 10mm socket on an extension, fitted to a ratchet handle, to remove these. You can then slide the radio unit forward and unplug it.