Gentex K21 Auto-Dimming Rear View Mirror w/Compass and Temp

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Gentex Auto Dimming Mirro w/Compass and Temperature
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Features

  • The Gentex K21 Auto-Dimming Rear View Mirror reduces eyestrain and driver fatigue
  • High-tech sensors and advanced circuitry recognizes and eliminates dangerous rear-approaching light
  • The K21 Auto-Dimming Rear View Mirror is equipped with a self-calibrating digital compass
  • Integrated remote exterior thermometer digitally reports outside temps and ice warnings
  • The K21 Auto-Dimming Rear View Mirror comes complete with detailed installation instructions and all mounting hardware
  • Installation of the mirror's electronic components requires some hard wiring (see Installation Guide tab for details)
  • Available with the optional Gentex Wire Cover for the most professional-looking installation that conceals loose wires (not necessary for all vehicles—see note below)
  • Your Gentex K21 Auto-dimming Rear View Mirror is backed by a 3-year / 36,000 mile warranty

Description

Headlight glare and your rear view mirror make a dangerous combination. Eliminate this volatile mixture with the Gentex K21 Auto-Dimming Rear View Mirror.

The K21 Auto-Dimming Rear View Mirror detects dangerous rear-approaching light and eliminates it with "intelligent" circuitry. What's more, less glare means less eyestrain and driver fatigue.

As if that weren't enough, the K21 Auto-Dimming Rear View Mirror comes with a self-calibrating digital display compass. The mirror even has an exterior thermometer that displays temps and ice warnings.

The windshield-mounted mirror comes complete with detailed installation instructions and all necessary hardware - perfect for the experienced do-it-yourselfer or professional installer with some wiring required. And, the Auto-Dimming Rear View Mirror comes with 3-year / 36, 000 mile warranty. See what a difference the K21 Auto-Dimming Rear View Mirror can make.

Notes

  • Installation of the mirror's electronic components requires some hard wiring (see Installation Guide tab for details)
  • The Gentex Wire Cover is highly recommended if there is 3" or more space between your mirror and the headliner. It conceals otherwise loose and visible wires running to the mirror. Select this part under "optional accessories" above.

Average Customer Rating

  (161)
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Evaulation for Ford F-250

Posted on 07/21/2006 by Marlon B. (Temple,TX)

"Overall the mirror does what it says it will do. It is accurate and easy to read. I wish the mirror were about 3/4" longer as my F-250 is a big truck inside. The installation instructions were excellent."

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About Marlon B.
I use my vehicle for
Travel and towing
 
Great product - easy install

Posted on 07/05/2006 by Stephen A. - 2005 Pontiac GTO (Denver,CO)

"I installed this on my 2005 GTO and was a little nervous. The site says it doesn't work for a 2005, only a 2006. I knew this was probably wrong as they're 99.9% the same car (less some minor cosmetic changes). The installation was a piece of cake and it works great - highly recommended."

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About Stephen A.
Vehicle
2005 Pontiac GTO
I use my vehicle for
Driving....
 
Works Great !

Posted on 06/27/2006 by Brandon H. - 2002 Chevy Silverado (Wichita Falls,TX)

"The compass is a convenience and the temp is very accurate. It even adds a little class to my 02 silverado. Instructions were easily followed and expectations surpassed. It really works great!"

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About Brandon H.
Vehicle
2002 Chevy Silverado
I use my vehicle for
numerous commuting and travel activities.
 
Mirror great but instructions poorly done

Posted on 06/15/2006 by James M. - 2004 Dodge Stratus (Norton Shores,MI)

"The mirror works great, but the instructions were way too complicated. After talking to some mechanic friends of mine, I was able to install the mirror myself in just a few hours. Once I ignored the instructions, the entire process went very smoothly. Captain Jim"

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About James M.
Vehicle
2004 Dodge Stratus
I use my vehicle for
family activities
 
does not fit Honda Insight

Posted on 06/09/2006 by Craig H. - 2006 Honda Insight (Newbury,VT)

"love the mirror, I put one in my truck 8 years ago and it's a must have. I bought this one to fit my new Insight. All the correct parts were sent, but you must first remove the mounting plate on the windshield and replace with the new one (supplied w/glue). THIS was not mentioned. I am now an expert (w/new ws)"

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About Craig H.
Vehicle
2006 Honda Insight
I use my vehicle for
Travel to construction sites
 
Great mirror!

Posted on 05/24/2006 by Betty W. (Talihina,OK)

"This mirror took me about an hour to install i installed in a 1997 chevy cavalier it works great and i would recomend to anyone.."

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About Betty W.
I use my vehicle for
Driving
 
Great Mirror

Posted on 05/17/2006 by Adam B. - 2005 Ford Focus (Burnsville,MN)

"Just what I wanted! Works like a dream, no problems whatsoever. I recommed it highly."

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About Adam B.
Vehicle
2005 Ford Focus
I use my vehicle for
Commuting
 
Great Mirror

Posted on 05/10/2006 by John E. - 2006 Toyota Tacoma (Kannapolis,NC)

"I am very happy with this mirrow it works. I would recommed it to anyone ."

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About John E.
Vehicle
2006 Toyota Tacoma
I use my vehicle for
Family Activities, Hunting, Travel
 
Gentex K21 Auto-Dimming Rear View Mirror w/Compass and Temp

Posted on 05/02/2006 by Rainer M. - 2006 Ford F250 (Oceanside,CA)

"Once you have one of these mirrors, you find you can't live without it. One came with my Saturn Vue, but when I purchased my new 2006 F-250 it didn't, so I HAD to get one. First off, this mirror offers a much better field of view than the OEM mirror, when towing my trailer with the original Ford mirror, all I saw was the front of the trailer. But with the new Gentex mirror, I can actually also see what's next to the trailer - a great feature! The compass is self-adjusting, all you have to do is set the zone you live in, for magnetic delineation. The thermometer is right on - in either Fahrenheit or Centigrade, your choice. And best of all, you never have to fumble with the mirror to set it for night driving - it's automatic! I had mine professionally installed so there are no messy wires - it looks great. If you want the best, this is it!"

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About Rainer M.
Vehicle
2006 Ford F250
I use my vehicle for
hauling my travel trailer
 
Best Mirror for your vehicle

Posted on 04/11/2006 by Eugene C S. - 2000 Ford F-250 (Minnesota Lake,MN)

"I installed the wiring and mirror following the easy instructions. It is working great. Thanks for a great product at a reasonable price."

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About Eugene C S.
Vehicle
2000 Ford F-250
I use my vehicle for
Work, Hunting, Fishing and travel.
 
Liz

Posted on 04/06/2006 by Elizabeth F. - 2006 Jeep Liberty (Pine Bluff,AR)

"excellent product"

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About Elizabeth F.
Vehicle
2006 Jeep Liberty
I use my vehicle for
fun
 
K21 Auto-Dimming Mirror w/Compass and Temp

Posted on 04/06/2006 by Russell F. - 2006 Chrysler Pacifica (Lake Wales,FL)

"After some delivery problems caused by Fedex Ground (they would not leave the package without a signature, let me pick it up, or change the deliver address) I received the package. After reviewing the installation instructions I asked my car dealer to install it. The charged me $200. Now that it is installed I am very pleased with the unit. It works perfectly."

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About Russell F.
Vehicle
2006 Chrysler Pacifica
 
Great mirror!!

Posted on 03/29/2006 by Daniel C. (Gainesville,GA)

"I had one on a previous vehicle and wanted one for my new Trailblazer. I was afraid that it might look cheap / very after market, but you don't know its not factory. Shipping was EXTREMELY fast, and instructions very clear. It took me about an hour to install...not rushing at all."

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About Daniel C.
I use my vehicle for
business 75%/pleasure 25%
 
Excellent Product

Posted on 03/25/2006 by Thomas P. (Wheeling,WV)

"As good of quality as any factory auto-dimming mirror. All functions work perfectly and installation in my 2005 Nissan Frontier NISMO was not difficult and took about two hours. I would highly recommend this mirror for purchase."

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About Thomas P.
 
best thing to have

Posted on 03/12/2006 by Travis P. - 2006 Pontiac Grand Prix (Holstein,IA)

"Since i got it i love how the auto-dimming works, no more bright lights."

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About Travis P.
Vehicle
2006 Pontiac Grand Prix
I use my vehicle for
commuting, travel
 
great price

Posted on 03/06/2006 by Steve G. - 2002 Lincoln Blackwood (Cocoa,FL)

"have not had time to install but mirror looks great. no real differance to factory except price is 60% less."

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About Steve G.
Vehicle
2002 Lincoln Blackwood
I use my vehicle for
personall use
 
2004 Rav 4

Posted on 02/18/2006 by Tom E. - 2004 Toyota RAV4 (Portland,OR)

"Missed having compass and temp as in prior vehicle. Checked with local car stereo installer for cost of installation. $65.00 worth of their headache not mine seemed reasonable. They did break the windshield, however. Not sure if negligence or window chip caused the problem. Zero deductible on Comprehensive insurance made it a moot point. Love the mirror. Auto dimming an appreciated bonus. "ICE" alert nice to have when temps low. "WHAT THE HECK ARE YOU DOING OUT HERE" alert when temps are REALLY low would be a good enhancement. Will buy one for spouse's, car next birthday."

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About Tom E.
Vehicle
2004 Toyota RAV4
I use my vehicle for
Commuting, family activities, etc.
 
Great product!

Posted on 02/10/2006 by Wade W. - 1997 Honda Prelude (Allen,TX)

"Installation was easy but cumbersome since a good bit of the interior had to be removed but I love this mirror! The auto-dimming feature is just the ticket to avoid being blinded by tall SUVs or pick-ups tailgaiting me. The compass and temp readout are great too. 2 thumbs up!"

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About Wade W.
Vehicle
1997 Honda Prelude
I use my vehicle for
commuting and showing
 
K21 Mirror

Posted on 02/02/2006 by Patrick R. (Avon Lake,OH)

"Easy to install,Works great. Make sure you get the wire cover--it's not included with mirror."

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About Patrick R.
I use my vehicle for
Hauling Race Trailer
 
Nice mirror, easy to install

Posted on 02/01/2006 by David B. - 2005 Pontiac GTO (Homosassa,FL)

"Installation was quite easy, instructions very clear and easy to follow. Web site did not indicate it would fit a 2005 GTO but I took a chance and it slipped right over the factory mount on the windshield. I had this feature on my last car and really missed it."

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About David B.
Vehicle
2005 Pontiac GTO
I use my vehicle for
commuting
 
Great Mirror

Posted on 01/31/2006 by Rodger R. - 2005 Nissan Frontier (Calgary,AB)

"The mirror works great!! Looks just like an OEM mirror. Took me only 90 minutes to install. Didn't really kow how much I would like until I installed it. Now I wouldn't live without it!! Accurate temp and the auto dim is awesome!"

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About Rodger R.
Vehicle
2005 Nissan Frontier
I use my vehicle for
commuting, travel to skiing/hiking/biking
 
Great Mirror

Posted on 01/25/2006 by Richard G. - 2004 Toyota Tundra (Lexington Park,MD)

"Kit came with everything needed and directions for my truck. Took a couple of hours to install (wanted to do it right). Very impressed. Now want to buy Auto Dim mirror for my wife's car."

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About Richard G.
Vehicle
2004 Toyota Tundra
I use my vehicle for
Personal use
 
Rear View Mirror Review

Posted on 01/24/2006 by Kathryn E. - 2002 Dodge Durango (Portage,IN)

"I really love this mirror. It was easy to install and looks great! I have had no problems...It is very acurate both in temp and direction. It definatly adds class to the inside of my vehicle"

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About Kathryn E.
Vehicle
2002 Dodge Durango
I use my vehicle for
commuting, travel, everything
 
K21 Auto-Dimming Rear View Mirror w/Compass and Temp by Mito

Posted on 01/19/2006 by Gerry C. - 2005 Dodge Durango (Denver,CO)

"Absolutely love this rear view mirror. Although it is a bit on the expensive side, it functions wonderfully. It took longer to read the instructions, than it took for installation. A simple switched +12V and ground connections....what could be simpler? Oh yeah...how about including the "optional" wire cover for this unit? For what I paid for this unit? C'mon people!"

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About Gerry C.
Vehicle
2005 Dodge Durango
I use my vehicle for
Family Activities
 
Great in cold climates

Posted on 01/12/2006 by Robert G. (Glenburn,ME)

"Easy hookup to stock harness, factory look. Would have been 5 stars but fragile temp. harness made the install a pain."

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About Robert G.
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