Genuine Schrader Tire Pressure Monitoring System TPMS Retrofit Kit SCHRFK4S. Tire Pressure Monitoring System TPMS Retrofit Kit. Please review the pictures listed to ensure this is the part you need. Any fitment data given in this listing is a guideline ONLY, please verify that this part is an exact fit for your specific vehicle and options. Please review the pictures listed to ensure this is the exact part you need. We recommend you check with your dealer for exact fitment for your specific vehicle. Thank you for shopping with OverstockDirect! We cannot accept items that have been installed, used or tried. Please include a copy of the invoice. Electrical parts are not returnable. Your recommended responsibility on making a return.