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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Awesome Product

Posted on 11/02/2007 by Barry D. - 2003 Nissan Altima (Grand Island,NE)

1 of 1 people found the following review helpful.

"This is a great product. The installation was simple and came with very detailed instructions. Very fast shipping and looks like factory original. I highly recommend this product"

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About Barry D.
Vehicle
2003 Nissan Altima
 
Great mirror!

Posted on 10/14/2007 by Ruth G. - 2000 Honda Odyssey (Greensboro,NC)

1 of 1 people found the following review helpful.

"This was a replacement for a seven-year-old defective mirror (made by another manufacturer). This one is much larger than the one it replaces and is satisfacory in every way. We are klutzes, so I can't speak to the ease of installation: our local auto stero shop installed for $45, rather quickly."

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About Ruth G.
Vehicle
2000 Honda Odyssey
I use my vehicle for
family activities
 
2007 Mustang GT Install

Posted on 10/10/2007 by Richard W. - 2007 Ford Mustang (Mesa,AZ)

1 of 1 people found the following review helpful.

"I found the easier path for the install was to run the temp sensor leads down the passenger side and thru the firewall. Remove the battery tray for easier access in the engine compartment. The factory harness to the mirror location has +12v and ground."

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About Richard W.
Vehicle
2007 Ford Mustang
I use my vehicle for
pleasure
 
Great mirror

Posted on 09/14/2007 by Darren V. - 2007 Nissan Frontier (Lodi,CA)

"This mirror is better than the one that comes from the factory by Nissan. It was much easier to install than I thought. Gentex makes it simple to do without being a professional installer. Instructions were simple to follow, but one needs to follow just as the instructions say in order to make it simple. The mirror is manufactured in good quality and the finished results after installation make it look as if it came with the vehicle. Thanks Gentex for a great product. And buy from AutoAnything.com they were the least expensive. Great price and free shipping!"

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About Darren V.
Vehicle
2007 Nissan Frontier
I use my vehicle for
everything
 
easy installation

Posted on 09/08/2007 by Jennifer M. - 2007 Nissan XTerra (Ennis,MT)

"REALLY pretty easy to install and the viewing area is larger than the OEM mirror..I LOVE it!!"

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About Jennifer M.
Vehicle
2007 Nissan XTerra
I use my vehicle for
everything
 
OE replacement

Posted on 09/05/2007 by Liam V. - 2007 Hyundai Santa Fe (Victoria,BC)

"Had this OE replacement professionally installed in 2 hours. Initial impressions are very good. Display is clear and temp appears reasonably accurate."

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About Liam V.
Vehicle
2007 Hyundai Santa Fe
I use my vehicle for
around town driving
 
A Great Addition any vehicle.

Posted on 09/01/2007 by John F. D. - 2007 Nissan Altima (Peoria,AZ)

"The Compass appears to be much more accurate then the factory installed unit in our previous vehicle and the temp gage is more stable then the one built into the Altima, less effected by temporary temp changes. A great functioning unit."

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About John F. D.
Vehicle
2007 Nissan Altima
I use my vehicle for
Family activities and travel
 
One of the best things I ever bought for my truck

Posted on 07/16/2007 by Timothy J. - 2006 Toyota Tacoma (Tempe,AZ)

"AutoAnything delivered my Gentex mirror fast. It was easy to install and looks great. It installs as if it were factory. I'm very pleased with the result."

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About Timothy J.
Vehicle
2006 Toyota Tacoma
I use my vehicle for
commuting
 
Love the Gentex

Posted on 07/16/2007 by Douglas C. - 2005 Acura MDX (Spring,TX)

"Installed a Gentex K21 in my new 2007 Tacoma 4X4. Installation was easy and the calibration went off without a hitch, thanks to the good instructions that came with the mirror. The mirror looks like it came with the truck."

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About Douglas C.
Vehicle
2005 Acura MDX
I use my vehicle for
commuting, hunting, and hauling whatever won't fit in the wife's car.
 
Awesome...Love it

Posted on 06/30/2007 by Elaine M. - 2007 Ford Mustang (Fresno,CA)

"I purchased this mirror for my 2007 Mustang. No problems with installation (had done by a male friend-not professional), looks great and works wonderful. Excellent product and great service."

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About Elaine M.
Vehicle
2007 Ford Mustang
I use my vehicle for
everything
 
I Love It!

Posted on 06/22/2007 by Robert M. - 2007 Honda CRV (Sarasota,FL)

"My 2007 Honda CR-V came with a plain rear-view mirror. I have always wanted a compass and outside temperature gauge and when my husband told me about the Gentex K21 Auto-Dimming Rear View Mirror w/Compass and Temp I couldn't wait to get one. It is everything you say it is and more! The auto-dimming feature is fantastic for night driving and having the compass and temperature right there on the mirror is perfect. Thanks for a great product!"

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About Robert M.
Vehicle
2007 Honda CRV
I use my vehicle for
family and social activities, shopping, leisure/fun
 
Excellent Mirror

Posted on 05/16/2007 by Agerico S. - 1999 Toyota Camry (Eldersburg,MD)

1 of 1 people found the following review helpful.

"Installation was so easy on my 1999 V6 camry. The hardest thing I have to do was remove the front wheel cover since I have to jack the car and remove the tires. I did not even have to drill a hole on the firewall since I was easily able to snake the wires through the door hinges. After installation of the temperature probe, the mirror fit in nicely on the button of the original mirror and can be tightened with a star screwdriver. I connected the power to an unused fuse (seat heater, which my car did not have any but had a switched power) with a universal connector that I bought from Auto Zone. The mirror worked immediately but the compass took a few minutes to work. I had to drive around the block as per the instruction, and worked after I got back in my driveway. Excellent item and easy to install"

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About Agerico S.
Vehicle
1999 Toyota Camry
I use my vehicle for
commuting and family activities.
 
Great mirror

Posted on 05/11/2007 by Mike B. - 2002 Chevy Silverado (Reno,NV)

"Love the mirror. I installed it on an 02 Chevy Silverado. It looks and functions great. Installation was fairly easy. Tools need were nothing out of the ordinary except a #15 torx bit small enough to fit into the plastic sun visor mounting brackets. Also, at least on the Chevy, the mirror takes a #15 torx. The mirror was a snap to remove and replace. My only minor complaint is the directions. This mirror can be used in many different vehicles, so the directions were somewhat generic."

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About Mike B.
Vehicle
2002 Chevy Silverado
I use my vehicle for
towing, camping, yard work
 
Ready for the trip now.

Posted on 05/05/2007 by Richard V. - 2007 Ford Mustang (Belmont ,MI )

0 of 1 people found the following review helpful.

"Works great,just as it should.Thanks for the fast shipping.Great to deal with."

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About Richard V.
Vehicle
2007 Ford Mustang
I use my vehicle for
Every day driving.
 
easy to install, flawless, OEM performance

Posted on 04/24/2007 by Jeffrey H. (Redding,CA)

"The title sums it up, less than an hour to install (99 Ford F-250 application) and program.Has worked flawlessly since."

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About Jeffrey H.
 
Excellent Product

Posted on 04/24/2007 by John G. - 2007 Toyota Highlander (Commack,NY)

1 of 1 people found the following review helpful.

"Easy to install, works great!! Looks factory!"

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About John G.
Vehicle
2007 Toyota Highlander
I use my vehicle for
everything
 
Perfect Add On

Posted on 04/20/2007 by Michael A. - 2006 Chevy Trailblazer (Ranger,GA)

"This is one of the best add ons one can purchase. Installation was super easy. Instructions were very clear, and the mirror even had the same shape and size as the O.E.M.-Only this one includes Temp and Compass."

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About Michael A.
Vehicle
2006 Chevy Trailblazer
I use my vehicle for
Daily Driving
 
Wonderful mirror

Posted on 04/12/2007 by Ralfonso G. (Chicago,IL)

"I am very satisfied with the auto-dimming rear view mirror with compass and temperature display. I followed tbe simple installation instructions. I would highly recommend to family and friends."

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About Ralfonso G.
 
What a wonderful mirror!!!

Posted on 04/04/2007 by Patrick C. - 2004 Pontiac GTO (Ridgecrest,CA)

"Originally, I purchased a JC Whitney Auto-dimming mirror. I was NOT going to put that thing in my new GTO, so I ordered the GENTEX. It is absolutely perfect! Easy to install, and looks dead stock. I recommend this mirror to anyone who wishes to have such a device. If I could rate it 6 stars, I would."

Was this review helpful? Yes No

About Patrick C.
Vehicle
2004 Pontiac GTO
I use my vehicle for
everything!
 
Great product

Posted on 04/01/2007 by Michael M. - 2007 Kia Sportage (Brandon,MS)

"Don't ask for help from the company that makes it. You won't get it"

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About Michael M.
Vehicle
2007 Kia Sportage
 
Easy install but I had help

Posted on 03/26/2007 by Ted T. - 2005 Nissan Frontier (Annapolis,MD)

"This is a great product mainly because its obvious that it is the same one installed by vehicle manufacturers. I'm pretty sure I've seen this mirror in most GM products on the road. It's a great unit and was fairly easy to install. I had help from a web site that was specific to my vehicle, but I love the functionality of this mirror."

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About Ted T.
Vehicle
2005 Nissan Frontier
I use my vehicle for
Everything
 
Excellent

Posted on 03/12/2007 by Patrick T. (Kiel,WI)

"How did I survive this long without it! Easy to install."

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About Patrick T.
 
2007 Town&Country

Posted on 03/05/2007 by Michael B. - 2007 Chrysler Town and Country (Hendersonville,NC)

"Just perfect!!-- Works Great ! Easy to install-instructions were great. I like having compass- and especially temps-- always on display-- Highly recommended!"

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About Michael B.
Vehicle
2007 Chrysler Town and Country
I use my vehicle for
business/trips
 
Works as advertised

Posted on 03/01/2007 by David C. (Rochester,MN)

"fairly easy install, works well!"

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About David C.
 
Nice mirror

Posted on 02/22/2007 by Bryan C. - 2006 Toyota Tundra (Charleston,SC)

"It would get 5 stars but you have to buy the piece that hides the wiring separately ($9). Other than that is was pretty easy to install for a novice and it works like a champ."

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About Bryan C.
Vehicle
2006 Toyota Tundra
I use my vehicle for
everything.
Showing 51 - 75 of 161 Customer Reviews
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