FREE SHIPPING - This is the OEM Fog Light switch used on 2001-04 Mustangs. It is also needed when installing fog lights into your 2001-04 base or GT models which may already have the wiring harness available, but did not come from the factory with fog lights. # 1R3Z15A214-AA. This item is final sale unless damage in shipping or defective. If using with a universal wiring system custom install on the wiring will be required. It will be direct plug and play fit for OEM wiring only.