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Auto-dimming (or not) rear view mirror

Discussion in '3rd Gen. Tacomas (2016-2023)' started by mtnc, Jan 12, 2021.

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  1. Jan 12, 2021 at 5:34 AM
    #1
    mtnc

    #1
    mtnc [OP] Member

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    I've had the truck for a few months now and never thought the rear view mirror dimmed much at night. This week I turned it off driving home from work at night and there is absolutely no difference in how bright headlights are behind me in on and off mode. The green power indicator comes on but there's no dimming. Is this a common issue? It's under warranty but I suspect I'll have a hard time proving there's a problem with it during the day when the service department is open.
     
    mtnc, Jan 12, 2021
    #1
    Tacolife5 and NorrinRadd like this.
  2. Jan 12, 2021 at 5:38 AM
    #2
    NorrinRadd

    #2
    NorrinRadd Well-Known Member

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    I wondered about this since I bought mine a year ago also but there are always more pressing things to deal with (such as replacing the plastic crap Toyota calls bumpers...)
     
    NorrinRadd, Jan 12, 2021
    #2
  3. Jan 12, 2021 at 5:51 AM
    #3
    Chew

    #3
    Chew Not so well known user

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    Mine seems to need fairly bright light to activate it. It's not terrible, but it is a little annoying that it takes an extremely bright set of high beams to activate it.
    I can't stand the shitbags driving around with their high beams on.
     
    Chew, Jan 12, 2021
    #3
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  4. Jan 12, 2021 at 5:59 AM
    #4
    NorrinRadd

    #4
    NorrinRadd Well-Known Member

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    Maybe from lifted trucks not re-aiming their headlights. When I get my lift installed I'll be doing that since I'm a responsible citizen and fellow driver sharing the road!
     
    NorrinRadd, Jan 12, 2021
    #4
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  5. Jan 12, 2021 at 6:02 AM
    #5
    mtnc

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    mtnc [OP] Member

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    It's not that, it's just that the lights are bright for all vehicles behind me, and they are the same brightness with the mirror on or off.
     
    mtnc, Jan 12, 2021
    #5
  6. Jan 12, 2021 at 6:10 AM
    #6
    muffyinva

    #6
    muffyinva Well-Known Member

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    Is the tinting on your back windows darker than stock?
     
    muffyinva, Jan 12, 2021
    #6
  7. Jan 12, 2021 at 6:26 AM
    #7
    mtnc

    #7
    mtnc [OP] Member

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    No tint yet.
     
    mtnc, Jan 12, 2021
    #7
  8. Jan 12, 2021 at 7:06 AM
    #8
    Jim1946

    #8
    Jim1946 2020 TRD Sport 4X4

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    Auto dimming works just fine in my 2020 sport.
     
    Jim1946, Jan 12, 2021
    #8
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  9. Jan 12, 2021 at 7:18 AM
    #9
    zoo truck

    #9
    zoo truck Well-Known Member

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    None
    Seems to work ok on my tacoma to.
     
    zoo truck, Jan 12, 2021
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  10. Jan 12, 2021 at 7:20 AM
    #10
    dave.phipps72

    #10
    dave.phipps72 Member

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    Works fine for my 2017.
     
    dave.phipps72, Jan 12, 2021
    #10
  11. Jan 12, 2021 at 7:27 AM
    #11
    mtnc

    #11
    mtnc [OP] Member

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    Have you tried turning it off to see if there is a difference?
     
    mtnc, Jan 12, 2021
    #11
  12. Jan 12, 2021 at 7:31 AM
    #12
    Chew

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    Chew Not so well known user

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    If they go around, it tends to be the blue hairs or the hoopties with front end damage. But, you're right, some lifted are blinding, good on you sir for doing the right thing.
     
    Chew, Jan 12, 2021
    #12
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  13. Jan 12, 2021 at 7:34 AM
    #13
    troutspinner

    #13
    troutspinner Fishing Addict

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    It works in mine. It is not as good as my last vehicle which prompted me to test it one night but it does work.
     
    troutspinner, Jan 12, 2021
    #13
  14. Jan 12, 2021 at 7:36 AM
    #14
    CrazyAirborne

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    CrazyAirborne Who jumps out of perfectly good airplanes?

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    OP literally says this in the second sentence of his post...
     
    CrazyAirborne, Jan 12, 2021
    #14
  15. Jan 12, 2021 at 7:37 AM
    #15
    mrtonyd

    #15
    mrtonyd Well-Known Member

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    its not noticeable all the time, but every now and then i can see a difference between the rear view mirror and driver side mirror

    the power rear view is really just good for that dongar attachment to power my dash cam from that power port
     
    mrtonyd, Jan 12, 2021
    #15
  16. Jan 12, 2021 at 7:40 AM
    #16
    RX1cobra

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    RX1cobra Well-Known Member

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    Mine's kinda slow to react but it does work. It's really noticeable that it dims when the back slider is open.
     
    RX1cobra, Jan 12, 2021
    #16
  17. Jan 12, 2021 at 8:13 AM
    #17
    CountofQ

    #17
    CountofQ Well-Known Member

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    No, my 2017 does not seem t work either. Have tested with various light sources. No changes what-so-ever.
     
    CountofQ, Jan 12, 2021
    #17
  18. Jan 12, 2021 at 8:27 AM
    #18
    BookieBob

    #18
    BookieBob Beer Drinker

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    BookieBob, Jan 12, 2021
    #18
  19. Jan 12, 2021 at 8:59 AM
    #19
    mwrood

    #19
    mwrood Well-Known Member

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    Doesn’t help you much, but mine worked fine on my 2020 SR5 and still works fine on my 2021 TRD Sport
     
    mwrood, Jan 12, 2021
    #19
  20. Jan 12, 2021 at 9:05 AM
    #20
    RyanDCLB

    #20
    RyanDCLB Well-Known Member

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    I haven't tested the auto dimming feature on my mirror, but I did cover the little green light with a small black vinyl square. That thing was so annoying! :frusty:
     
    RyanDCLB, Jan 12, 2021
    #20
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Products Discussed in

Dongar Dash Cam Power Adapter (12-pin Type A) - Compatible w Toyota Tacoma (15-23), select Highlander, Tundra, Sienna; Honda Ridgeline & more. USB Power, Connects to Rearview Mirror. Easy Install!
$36.99
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