While there isn’t a set time period for generational changes, most manufacturers will redesign models when they feel the current model is outdated and no longer keeps pace with rivals - usually after three to five years. Some models go much longer before being redesigned, however. Generation changes may keep the original ethos behind the car, but the automaker will adapt the entire design to ensure it remains competitive in its segment. Generation changes attempt to smooth out any issues that affected the previous models negatively to provide a more well-rounded product overall, whether that is outdated styling, problematic mechanics, or unreliable parts.