Additional rearview mirrors typically refer to auxiliary observation devices installed outside the vehicle's original rearview mirror system, primarily used to expand the driver's field of vision or provide more comprehensive rear road condition information for specific scenarios. Functionally, additional rearview mirrors can be categorized into blind spot mirrors (mounted on outer rearview mirror edges to cover areas difficult to observe with conventional mirrors), extended downward-view mirrors (improving detection of obstacles beneath the vehicle's front end), and detachable wide-angle mirrors (for temporary field-of-vision expansion). Notably, installation must comply with Road Transport Department (JPJ) vehicle modification regulations: mirror curvature radius shall not exceed 1500mm, and mirrors must not protrude beyond the vehicle's width limit. Some premium models incorporate electronic rearview systems using cameras for multi-angle monitoring - a technology gaining local market traction, though modification costs range from RM800 to RM2500. Regular maintenance should include checking mirror cleanliness and mounting stability to prevent vibration-induced viewing inaccuracies.
