Bajaj qute is four-wheeler type of bajaj which is categorized under small utility vehicles (LTV). In ourrncountry (Ethiopia) Bajaj qutes are the main transportation system in transport industry. Passenger cars hadrnthe lowest rollover fatality rate (23 percent of fatalities were in vehicles that rolled over), while SUVs hadrnthe highest, 59 percent. Clearly, rollover crashes are a major safety problem for all classes of light vehicles,rnparticularly LTVs. Except on static stability factor (SSF) approach for the analysis, there is no enoughrnresearch paper which worked particularly on rollover propensity of Bajaj qute. SSF ignored the effect ofrnsuspension system. In reality vehicle suspension allowed for significant movements of wheels with respectrnto the body. And it had significant effect on lateral behavior of bajaj qute. The lateral forces are transmittedrnbetween the body and the wheels by rigid suspension arms. The suspension arm should also be analyzedrnby FEA to ensure that the part is strong enough to with stand the applied loads. In addition, varying thernrollover behavior of a car could have an effect on ride comfort behavior of the passenger occupant. It isrnneeded to verify the effect on ride comfort behavior of Bajaj After the rollover behavior of the car isrnchanged. The whole suspension system of bajaj qute was modelled in ANSYS and ADAMS/CAR forrnstructural and dynamic analysis respectively. The part with worst loading was selected for structuralrnanalysis to ensure that the part is strong enough to with stand the load applied. For dynamic analysis, thernfull vehicle was modelled for roll over analysis. Hence, both suspension system and full vehicles arernoptimized by ADAMS/INSIGHT for suspension parameter and rollover respectively. Sprung mass RMsrnvalues for different bajaj qute speeds were calculated to check ride comfort behavior of original andrnoptimized model. From the structural analysis the lower control arm was strong enough to with stand thernload applied. Furthermore, the analysis showed that the arm carries extra strength which takes us tornadditional weight. So that, topology optimization is done with constant fatigue life. Using topologyrnoptimization, the mass of the vehicle was reduced and resulted in to reduction of carbon emission of Bajajrnqute by 1.4%. using the rollover optimization, the fishhook speed of car was increased from 50km/hr to rn60km/hr. Ride comfort analysis showed that, even if both the original and optimized models are within thernstandard limit, the optimized model was more comfortable for the passenger occupant than the original one.rnFinally, as a conclusion, suspension systems parameters had invaluable effect on the lateral behavior of car.