Are the police allowed to search my car if I say no? The answer to that is generally no. If they don't have probable cause of a crime being committed, then they're not going to be able to search your car without a search warrant. If they have probable cause, they don't need a search warrant. For example, he walks up to your car, you roll the window down, and he smells we got probable cause now that you're in possession of an illegal substance, so he can search your car without a warrant and without consent. Now, he may ask you for your consent anyway, but remember, we never give consent because we don't answer questions. So when a police officer asks you for consent to search your car, you say, "I'm sorry, officer.