A warrant is nothing more than a court order permitting the search. In Arizona, law enforcement officers need probable cause to search your vehicle without a warrant or your consent.The Fourth Amendment generally requires government officials to obtain an arrest warrant or search warrant to execute a valid search and seizure. The case concerns the constitutional standards that apply to a warrantless search of a probationer's residence. Did you know police officers can enter your home without a search warrant? In certain circumstances in Arizona, law enforcement officers may search your vehicle without a search warrant or your consent. What Does the Fourth Amendment Require in a Search Warrant? The search warrant is invalid if it is not grounded in a reasonable belief or fact that justifies the suspicion. The Fourth Amendment only protects against "unreasonable" searches. "A search or seizure without a warrant as an incident to a lawful arrest has always been considered to be a strictly limited right.