In order to predict the variation of inductive crosstalk of the cable bundles as the automobile was in motion, both the prediction model of the inductive crosstalk best/worst cases and the amended model by Monte Carlo method were established. According to the extreme position of wires in cable bundles, the prediction interval of the inductive crosstalk best/worst cases was defined. By using the Monte Carlo method the mathematical expectation of the inductive crosstalk was obtained, and the confidence level for the expectation was defined under the circumstance of 80% confidence level. Here, the confidence level was the amended prediction interval. By comparison with the results from EMC Studio electromagnetic simulation software, it is shown that the cable bundle crosstalk in all selected positions are in the best/worst case interval and most of them are in the amended interval when the frequencies are lower than 5 MHz.The length of the amended interval has decreased by 40%. Moreover,the electrical dimensions tend to electrically large and the error also increases when the frequencies are higher than 5 MHz.It concludes that the both models are simple and convenient to predict the inductive crosstalk rapidly according to different accuracy requests.