
The most effective placement for blind spot mirrors is on the outer upper corner of your side mirrors. This position allows you to see your traditional blind spot zone without significantly obstructing the main field of view from the mirror itself. Proper installation is critical for eliminating the dangerous area that standard mirrors cannot cover.
Before sticking them on, clean the mirror surface thoroughly with the provided alcohol wipe. Position the convex mirror so its inner edge is flush with the outer edge of your main mirror. The goal is to see the lane next to you in the small mirror as a car leaves your main rearview vision. It should not be pointed directly behind the car, but angled outward to capture the adjacent lane.
A common mistake is placing the blind spot mirror too low or too far inward, which defeats its purpose. You should be able to glance from your main mirror to the blind spot mirror with minimal eye movement. According to a study by the National Highway Traffic Safety Administration (NHTSA), properly positioned auxiliary mirrors can reduce lane-change collisions by up to 18%.
The table below compares the visibility coverage of different mirror adjustment methods:
| Mirror Adjustment Method | Standard Blind Spot Coverage | Required Head Turn | Ideal For |
|---|---|---|---|
| Factory Default Settings | Poor (30-40 ft zone missed) | Significant (over shoulder) | City driving, low speeds |
| "SAE" / Side Mirror Outward Method | Good (reduces blind spot) | Minimal (shoulder check) | Highway merging, confident drivers |
| Blind Spot Mirrors (Correctly Placed) | Excellent (covers ~15-20 ft zone) | Minimal to none | New drivers, towing, high-traffic areas |
| Blind Spot Mirrors (Incorrectly Placed) | Fair to Poor | Still required | N/A - ineffective placement |
| Integrated Blind Spot Monitoring Systems | Excellent (electronic warning) | None (audible/visual alert) | Modern vehicles, safety-focused drivers |
Remember, these mirrors are an aid, not a replacement for a proper shoulder check, especially when changing lanes in dense traffic.


