It is technically feasible to install a Blind Spot Monitor (BSM) by yourself, but attention should be paid to legality and installation professionalism. The system monitors the blind spots on the side and rear of the vehicle through radar sensors (typically operating at 24GHz or 77GHz frequency bands). The cost for a complete aftermarket modification ranges from approximately 1,500 to 3,000 Malaysian Ringgit, while the original factory system costs between 4,000 and 6,000 Malaysian Ringgit. Notably, the modification must ensure it does not compromise the safety of the vehicle's original electrical system and may require temporary removal during annual inspections. Although the system enhances lane-changing safety (particularly in rainy conditions or high-speed scenarios), drivers should maintain their observation habits and not rely solely on electronic assistance. It is advisable to select a modification workshop with MARA certification to avoid risks of false alerts or missed detections due to improper installation.