Because substitute or imitation parts are not guaranteed to be made to the same specifications and performance as genuine TCM parts, they may have a bad effect on other parts. In the worst case, the use of parts from other manufacturers may damage your vehicle. This explains why we say that genuine TCM parts are indispensable in keeping your TCM vehicle in optimum condition. Moreover, using genuine TCM parts is very important in ensuring the longest possible service life for your vehicle. Use of any parts other than genuine TCM parts during the warranty period will void the TCM warranty. This means that the warranty will not cover any problem that occurs to your vehicle, regardless of whether the problem is related to the substitute part used.