That varies by kit. Replacement panels may reuse factory vents, trim pieces, switches, climate controls, or other dash hardware, while supplying new radio brackets, clips, retainers, or a pocket. Metra's DP-6551, for example, transfers the factory vents and steering-column trim to the new panel. Review the kit-components and preparation sections before disassembly so you know which original parts must be intact and moved over.