To ensure that you get the correct ABS sensor, it is best to check the size and shape of the one currently installed so you can compare with the listed sensors. Some important information for selecting the correct ABS sensor is fitting position, type of braking system, the driving dynamics of the vehicle, cable length, sensor type (passive, active or inductive) and date limitation of the unit. As car manufacturers regularly update their models; some ABS sensors will only fit particular models of certain years.