This is a brand NEW Circuit Board to repair your broken Toyota Auxiliary Stereo Adapter Part Number M3J489018x. | You simply slide out the old broken circuit board, and slide in the brand NEW one we send you. | A new and upgraded design, this adapter permanently solves Toyota's design flaws. | Please comfirm whether the product is suitable for your vehicle before purchasing. | Aftermarket product with premium quality. Please contact us for help with any product related questions.