Taxi 4 (also spelled T4xi) is a 2007 French comedy film directed by Gérard Krawczyk. It is the sequel to the 2003 French Action/Comedy film Taxi 3. As with all the other films in the Gallic Taxi franchise, Samy Naceri plays taxi driver "Daniel Morales", this time in a Peugeot 407 unlike the 406 in the previous films. Frédéric Diefenthal is "Émilien Coutant-Kerbalec", whilst Jean-Christophe Bouvet reprises his role as "General Bertineau" yet again. The film also features French footballer Djibril Cissé.

A Belgian criminal, wanted all over Europe for his crimes, is in the custody of the Police Department of Marseille to be watched for a few hours before transfer to a prison in Congo. Unfortunately Émilien (Frédéric Diefenthal) is tricked by the villain and convinced to let the prisoner go. After these events he's fired but luckily for him his friend Daniel (Samy Naceri) helps him one more time telling him the location where the criminal is located, having been the taxi driver who drove him after he left the police station, not knowing he was a criminal. After this Émilien gets his old job back by telling the commissioner where to retrieve the criminal. He's then captured and taken to jail.