FUEL INJECTOR

The invention relates to a fuel injector (10), in particular a common rail injector, with an injector housing (11) in which a high-pressure chamber (15) is formed, which can be supplied with pressurized fuel via a supply bore (19) arranged in the injector housing (11), with at least one injection opening (12) formed in the injector housing (11) and connected at least indirectly to the high-pressure chamber (15) for injecting fuel into the combustion chamber of an internal combustion engine, with an injection member (16) which releases or closes the at least one injection opening (12), and with a measuring device (30) for at least indirectly detecting the pressure in the high-pressure chamber (15) or the supply bore (19), wherein the measuring device (30) is designed to detect an elastic deformation of a deformation region (27) arranged in operative connection at least indirectly with the supply bore (19) or the high-pressure chamber (15), wherein the measuring device (30) comprises a sensor element (32) which is connected in operative connection with the surface of the deformation region (27), and wherein the sensor element (32) is loaded with a preload force (F) in the direction of the deformation region (27) by means of a device at least partially covering the sensor element (32).