I would say it doesn't necessarily show blind spots but for me it shows me more of the road behind me and a little further down the road and while I'm installing My side mirrors work fine. I can set it where it's right, when the car disappears down the lane they show up in my side mirror, which I had a hard time with the stock unit. I drive in traffic all the time and that makes a big difference compared to the stock, but then again I can't say it covers blind spots just by looking in the rearview mirror.
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