Welcome to Proper Parts

We design, manufacture, and refurbish high quality aftermarket auto parts for several model years of Rolls-Royce, Bentley, Range Rover, and General Motors Cadillac, Buick, Chevrolet, Oldsmobile, Pontiac, and GMC. We sell Power Seat & Mirror ECU Control Modules, Power Seat Transmissions, and Power Seat Motors. If you can't find the out-of-stock obsolete replacement part that you need, please ask. We may have it in production, or you can feel free to submit a request. We've been building "better than new" since 2006.