[shhhpark]

Hi all,

I have a fairly new 2023 M340i and had a couple instances where blind spot detection won't be active. It's only happened twice from what I recall so I don't really have any idea how to re-create it other than the vehicle was remote started in the most recent instance of it occurring. The light on the mirror wouldnt light up even at a red light surrounded by cars. Has anyone experienced this before?

[Eljefe25]

I don’t think it lights up when the car is stationary. If it doesn’t light up at all, check that it’s not turned off. It’s under driving settings I believe .

[BimmersAndBoilermakers]

The blind spot detection has an algorithm behind it that tells it when to activate and when not to. It’s not as simple as if a car is in your blind spot it will activate.

As an example, if you pass a car fairly quickly the blind spot won’t activate because, by BMWs default algorithm, it assumes that you know a car is there since you just passed it. The only times the blind spot will activate is if a car is passing you or you are passing a car quite slowly and it remains in your blind spot for some prolonged period of time.

I had the same question when I first got my vehicle and had to do some digging to figure that out. Hope that helps!

[wrickem]

There’s a minimum speed you have to be going which is “country specific” according to the manual. Mine doesn’t light sitting in traffic surrounded by cars.

It should flash when you unlock your car though to let you know it’s enabled.

[dhock_holiday]

BMW has a crappiest Blindspot implementation ever. I can barely ever see the triangle in the sunlight and there’s no audio alert either.

[BrianHenley]

Originally Posted by BimmersAndBoilermakers

The blind spot detection has an algorithm behind it that tells it when to activate and when not to. It’s not as simple as if a car is in your blind spot it will activate.

As an example, if you pass a car fairly quickly the blind spot won’t activate because, by BMWs default algorithm, it assumes that you know a car is there since you just passed it. The only times the blind spot will activate is if a car is passing you or you are passing a car quite slowly and it remains in your blind spot for some prolonged period of time.


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I had the same question when I first got my vehicle and had to do some digging to figure that out. Hope that helps!

Thank you for helping me out. I appreciate you.