A method and a monitoring unit for monitoring a tire of a vehicle record a first measured value of revolutions of a tire with a first sensor. In addition, a second measured value of the revolutions of a tire is recorded with a second sensor. Alternatively, a second measured value of a second, different measured variable of a tire can also be recorded. In a further step, the directly measured or derived measured values of a measured variable are compared and an error signal is generated if a determined deviation is greater than a predefinable tolerance value.