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 development or we may know "the guy who does that." We've been building "better than new" since 2006.