K-Source Custom Extendable Towing Mirrors - Electric/Heat w Turn Signal - Textured Black - Pair

Part Number: KS70103-04T

350 Reviews | 87 Questions

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k source towing mirrors full replacement mirror k-source custom extendable - electric/heat w turn signal textured black pair

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DIY Install: K-Source Custom Extendable Towing Mirrors on your 2018 Toyota Tundra

The Low-Down on the K-Source Custom Extendable Towing Mirrors

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Custom, power towing mirrors replace the factory mirrors on your vehicle. The mirrors telescope out to extend your lines of sight. A turn signal is built into each mirror housing, and the heated glass clears frost and ice. Great Prices for the best towing mirrors from K Source. K-Source Custom Extendable Towing Mirrors - Electric/Heat w Turn Signal - Textured Black - Pair part number KS70103-04T can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.

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K Source Towing Mirrors - KS70103-04T

Features:

Extendable towing mirrors replace the factory side-view mirrors on your vehicle
- No need for snap-on or strap-on mirrors that you constantly have to put on and take off
Telescoping function makes it easy to see around the sides of your trailer so you can safely change lanes, pass, and park
- Pull mirrors away from your vehicle to extend your lines of sight
- Push mirrors back into place when you're not towing
Power mirror adjustment lets you change mirror face position with the factory control inside your vehicle
Heated mirror glass clears frost and ice and reduces fogging
Incandescent amber light on sides of mirror flashes when turn signal is activated
Built-in spotter mirrors reduce blind spots
Hinged design allows you to fold mirrors up against vehicle for parking or for fitting into tight spaces
Durable plastic housing with textured black finish
Custom fit for your vehicle
Simple, no-drill installation
- Same footprint and mounting points as factory mirrors
- Mirrors plug into existing electrical wiring

Specs:

Quantity: 2 mirrors
Dual mirror face dimensions: 10" tall x 9" wide
Distance from edges of mirror to vehicle:
- Extended length: 23-3/4"
- Retracted length: 20"
90-Day warranty

Note: The power remote capability, heated glass, and turn signals of these mirrors will work only if your vehicle already has those functions.

These telescoping towing mirrors replace your OEM side-view mirrors and provide the extended view needed for safe towing. Now you can change lanes, merge, and pass other cars with confidence, even with a trailer in tow.

The mirror faces on the custom mirrors can be pulled out to give you an extended field of vision for towing. Simply push the mirrors back for regular use.

The entire housing of each mirror conveniently folds toward your vehicle for easy parking or maneuvering in tight spaces.

70103T-70104T KSource Custom Power Heated Towing Mirror with Turn Signal - Telescoping - Textured Black - Pair

This Product Fits The Following Vehicles

2008 - 2022 Toyota Sequoia
2007 - 2021 Toyota Tundra

Customer Satisfaction Score:

90% were satisfied with this product

10% of customers were not satisfied

Product did not meet expectations
Wrong item was ordered
Too difficult to install

10% of customers were not satisfied

Product did not meet expectations
Wrong item was ordered
Too difficult to install

4.6

350 reviews

5 Stars		(274)
4 Stars		(49)
3 Stars		(7)
2 Stars		(7)
1 Star		(13)

by: Fiss1069 09/29/2025

2021 Toyota Tundra

Great mirrors, simple plug and play on 21 tundra. Simple install, looks amazing. Lights work, power adjusting works and defrost

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Lazer S.

9/30/2025

Install looks great, Christian! I would even argue they look stock on your truck. : ) What will you be towing?

Fiss1068

10/1/2025

@LazerS Jayco 22fb travel trailer. definitely improvement over the stock oem

Fiss1068

10/1/2025

@Fiss1068 definitely improvement over the stock oem

Lazer S.

10/1/2025

@Fiss1068 Sweet camper! Glad you can see behind it now! : P

by: Andrew 05/10/2026

2008 Toyota Tundra

The mirrors look and fit awesome. i got an added bonus as my 08 Tundra was not supposed to be wired for turn signals. Well I ended up with heated,power marker lights and signals. all is good except fot the broken top corner on the PS. found part in box and glued it. chalk this up to shipping handling.

by: Barney M 12/02/2016

2011 Toyota Tundra

This was a fairly easy job, although ripping off the door panels was a little unnerving.
My truck is a 2011 Tundra and had electric/heated mirrors. I was pleasantly surprised that the built in turn signal and running lights now work! Everything was plug and play! Love them!

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Barney M. One Year Later

12/2/2017

Outstanding!

by: Mike 04/21/2026

Toyota Tundra

Very easy install. All functions work even the running lights and turn signals which my factory mirrors didn't have. Will update review after first camping trip to see how they perform with the travel trailer. Installed on 2021 Tundra.

by: Joey C. 08/05/2016

2015 Toyota Tundra

What a great upgrade for my 2015 Toyota Tundra SR5! Perfect fit. Only took about 15 minutes per mirror to replace them. I didn't have blinkers or clearance lights on my stock mirrors, but these mirrors plugged right in and now I do. I do confess that they are taking me some time to get used to, but I can now see where my tire hits the ground and still have full view of the side of my truck. I can't wait to use them to pull my new travel trailer. I will no longer be a nervous wreck, constantly adjusting my mirrors so that I don't run into something. The biggest problem I see is that I can no longer park in my parking lot at work without getting out of my truck to fold the mirrors in. I'm not certain, but I would guess they add about 4-5 inches width on each side of the truck. I'm ok with that, because these things are a necessity when towing a big trailer. Thanks Etrailer!

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by: Kyle 12/06/2021

Product is exactly as expected. Install was simple. All bolts line up with existing holes in vehicle frame. Ensure you apply the weather stripping on the mirror before install. Pictures and videos online are helpful. Side marker lights and turning signal works on mirrors. Great product! Attached are 3 photos.

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by: Matt 10/01/2026

Great product. Installed easily. Works as advertised.

by: Will 02/09/2019

2018 Toyota Tundra

Easy install. Came with all hardware incase you drop and/or lose the existing hardware while uninstalling OEM mirrors. No shakes or rattles. Top portion is power adjustable, bottom is manual adjust for viewing angles.
My truck is a Limited and has Blind Spot Alert (BSA) & Rear Cross Traffic Alert (RCTA). These 2 features are lost and throw a dash light to see dealer. The warning is annoying, it towing visibility is more important. I'll follow up with my dealer (who actually recommends these mirrors) to see if the dash lights for these 2 systems can be deactivated.

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by: Joe H (Virginia) 08/12/2014

2008 Toyota Tundra

Received the mirrors in less than 3 days. checked out the video on
utube and on Saturday took me about 30 mins to change out both
mirrors. Mirrors look great and perform outstandingly. The lights and
turn signals work even though the old mirrors did not have that. The
remote positioning works and I would say the defrosters will also (still in the 80's) I have included pictures. Now I can see the back of my camper and should have an easier time backing. Thanks

Click to Enlarge

by: Scott 09/02/2026

2018 Toyota Tundra

Fast accurate service!

by: Duane 04/22/2015

2010 Toyota Sequoia

The mirrors were delivered in 5 days, and look sharp! Installation was a breeze after watching YouTube videos. I am not a mechanic, and wouldn't have tackled installation had it not been for the videos. The only disappointment was finding out that the mirrors must be folded in manually (like to go through a car wash or other tight space). The original mirrors folded at the push of a button.

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by: Travis 04/10/2021

Mirrors look good on truck easy to install. Only thing a is getting use to them over the stock mirrors. So far they seem durable didn’t have mirror maker lights before but with these mirrors my truck has them now.

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by: nick 06/07/2013

Toyota Tundra

Fit perfect and look great on my tundra. Side markers work even though my stock mirrors didn't have them. Excellent buy and shipping was incredibly fast. Very pleased

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by: Steven S. 07/20/2017

Toyota Tundra

I just purchased these mirrors. Took 30 mins to install. Really simple. Happy with the purchase. I tow a 29ft travel trailer

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by: Mike B. 06/14/2012

2012 Toyota Tundra

were easy to install. They look really nice on my truck and I will be using them towing my camper for the first time next week .

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by: Dirk 01/06/2022

Just installed them and they look great, well made , look like they were oem, and received them quickly,have used etrailer several times and so far they don’t disappoint.

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by: Douglas 05/21/2018

2016 Toyota Tundra

Mirrors look great and install was a breeze. It took longer to get door panel off than it did to swap out mirrors.

My only complaint is that the passenger side mirror has a huge increase in how close objects appear to be to the truck compared to OEM mirror, so there is an adjustment period to get use to the mirror.

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by: Kirk 09/03/2025 One Year Later

These are excellent mirrors. I would buy them again in a heartbeat. Fairly simple to put on, but takes time. They look like factory mirrors.

by: Dan 08/08/2019

2017 Toyota Tundra

2017 Tundra. Broke the OEM right side mirror being careless. Really needed tow mirrors anyway, so changed them both out. MUCH better for towing our camper and enclosed cargo trailer. Fit perfectly. Watched a couple of people replace these on YouTube. Easy project. They are notably bigger than the OEM shorty mirrors, but that's kind of the point. They look very similar to the OEM extendables on quite a few makes of truck so they don't look odd when not towing. Truck still fits through 10' wide garage door with no problem. Really tight on 9' garage door without folding either if their not extended but does fit (barely). Folding the left side and leaving the right in the retracted position, it fits through the 9' door just fine. Exactly what I needed.

Dan One Year Later

8/9/2020

After a year, still working perfectly. Extendable towing mirrors is something I should have had on all the trucks I ever ever used to tow anything bigger than a Jon boat.

by: Dan 11/13/2024 One Year Later

Essential for pulling my boat on trips to ocean

Dan One Year Later

11/14/2025

Fantastic . The mirrors are perfect for trips where I am pulling my 20’ Duckworth boat. It makes the blind spots viewable. When not pulling boat they slide back to normal position within seconds. Very flexible!

Kate F.

11/17/2025

@Dan Glad we had the right fit for keeping you safely towing your boat to the water Dan! What body of water do you mainly go out on? I have a Ranger and am out on the Lake of the Ozarks a lot here in Missouri, although the summer months you can mainly find me on Mark Twain Lake. The big wakes are little too much for us in the summer months at the Ozarks!! As long as the boat ramps aren't frozen over we are going out!!

by: George 05/26/2020

2015 Toyota Tundra

Received K-Source Custom Extendable Towing Mirrors for my dark gray 2015 Tundra as expected. I had a bit of trouble getting the driver side OEM mirror removed as the center locating peg would not let go. Past that everything went together smoothly with only small adjustments to align the brackets with the door trim. Mirrors and lights worked as expected. Road test proved vision to sides and rear of trailer were greatly improved. Definitely, liked the addition of the blind spot mirrors...

George One Year Later

5/27/2021

No problems...working as expected...

by: Jim 06/22/2022 One Year Later

Love these mirrors. Bought them knowing there was no BSM, but didn’t think about the effect it had on safety system. Set off code for BSM and rear cross traffic. The warnings can be turned off in the dash menu but you lose the safety features. These are so much better than the strap-on towing mirrors! Also love the extension. It gives even more view down the passenger side of the travel trailer. Installation was a breeze.

Jim One Year Later

6/23/2023

Still love the mirrors. They are a bit hard to pull out all the way. I have lubricated them to see if that helps.

by: Jocelyn 03/24/2026

2021 Toyota Tundra

Same as my old mirrors easy install

by: Mark 07/01/2021 One Year Later

Have had great luck with these mirrors. Tried many slip on and clip on towing mirrors but none stayed put (several actually blew off going down the road). Finally bit the bullet and purchased these total replacement mirrors. They fit like the OEM mirrors.

Mark One Year Later

7/2/2022

Mirrors are still working great! Still one of the best upgrades I have made.

by: Todd V 08/05/2013

2015 Toyota Tundra

The mirrors arrived well packaged and with no instructions. Following easily found YouTube vid, installation was easy taking around 15 minutes per mirror. The mirrors are good quality. On my 2010 Tundra the signal, heat, and adjust features all function fine though my OEM mirrors did not have the signal feature. The driver's side mirror produces a whistle when the vehicle is moving faster than around 45 mph. I hope to fix that with a piece of duct tape... without the whistle they'd get that fifth star from me.

Randy

8/27/2013

Where on youtube did you find the installation procedure?

Todd V.

8/29/2013

Uh, a Google search for replace tundra mirror produces two videos among the top ten search results. Both videos where helpful. The mirror replacement is straight forward. Pulling the door interior off takes a bit of force. I hadnt done it before so didnt know quite how hard to pull. Start at the bottom as in the video, lift up and outward. There are still some wires attached so have something to set it on, or someone to hold it.

Patrick B.

8/29/2013

Thanks for the input and hints!

350

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Show More Reviews

See what our Experts say about this K Source Towing Mirrors

Do you have a question about this Towing Mirror?

Recommended Towing Mirrors for a 2020 Toyota Tundra TRD Pro
Hey Lamberto! We've got a couple of options depending on how much of an upgrade you're interested in making to add towing mirrors to your 2020 Toyota Tundra Trd Pro. I have listed them below: K-Source Snap & Zap Custom Towing Mirrors item # KS81300 K-Source Custom Extendable Towing Mirrors item # KS70103-04T The K-Source item # KS81300 are going to clamp around your existing mirrors. They are compatible with that standard power-adjustable, heated side-view mirrors that came with the...
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Will K-Source Towing Mirrors Fit 2017 Tundra With Electric Heated Mirrors but no Turn Signals
Yes, the wire harness of the K-Source Custom Extendable Towing Mirrors - Electric/Heat w Turn Signal # KS70103-04T will fit your 2017 Toyota Tundra even though your Tundra's mirrors do not have turn signals. These are a great option for your Tundra to give you an extended view so you can be extra safe while towing with your Tundra. I've added a link to a video review for you to check out on these mirrors as well.
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The K-Source Snap & Zap Custom Towing Mirrors part # KS81300 is listed as a direct fit for your 2017 Toyota Tundra however, these mirrors will only fit models with flush mirrors meaning there are no protruding features that extend from the outer surface of the mirror such as turn signal lights and puddle lights. If you do have these protruding features on your side mirrors, you have two options to choose from. The first option is a permanent replacement such as the K-Source Custom Extendable...
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Replacement Extendable Mirrors for 2007 Toyota Tundra
I am not sure what mirrors you currently have on your 2007 Toyota Tundra but if they are simply hanging off and you cannot get them to snap back in place they will need to be replaced as it is likely the tabs that hold it together are broken. I recommend checking out the K-Source Custom Extendable Towing Mirrors # KS70103-04T, which are a fit for your '07 Tundra and have power adjustability, heated glass, and turn signals (though those functions will only work if you had them on your OEM...
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How Far Out do K-Source Tow Mirrors Sit When Pushed in on 2016 Toyota Tundra
Hey Marcel, when the K-Source Tow Mirrors part # KS70103-04T are pushed in they stick out 20 inches from the vehicle. When extended it's 23-3/4 inches. I attached a picture of what they look like when installed an pushed in for you to check out to get an idea what it will look like. I think it looks like a pretty normal truck mirror. What do you think?
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Replacement Towing Mirrors For A 2019 Toyota Tundra SR5 CrewMax
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Do the K-Source Extendable Towing Mirror Have the Blind Spot Detection System Toyota Tundra
I spoke to my contact at K-Source and they informed me that the K-Source Custom Extendable Towing Mirror part # KS70104T does not incorporate the use of the factory blind spot detection system. They will still work for you and retain all other factory features but you will lose the blind spot detection system. For a pair of these side mirrors, you will want part # KS70103-04T. We also have them available in chrome using part # KS70131-32T. Unfortunately, the K-Source mirrors are the only...
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Vibrations In Mirror After Installing K-Source Custom Extendable Towing Mirrors On Toyota Tundra
The only thing that I can think to check on the K-Source Custom Extendable Towing Mirrors part # KS70103-04T that would cause vibrations while driving is the mounting hardware. The mirrors are secured with three bolts per side so I recommend removing the cover panel inside and checking that these bolts are tight. I have attached a video for you that shows how the panel is removed. If this issue still persist, you might want to re-install the factory mirrors and then use the K-Source Snap...
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Towing Mirrors Compatible With Blind Spot Monitoring System On a 2020 Toyota Tundra
I recommend using the K-Source Snap & Zap Custom Towing Mirrors # KS81300 on your 2020 Toyota Tundra with the Blind Spot Monitoring indicator in the mirror. The K-Source Custom Extendable Towing Mirrors # KS70103-04T you were looking at do not have the indicators for the BSM system.
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How to Fix Extending Towing Mirrors for 2015 Toyota Tundra
I checked with K-Source on the K-Source Custom Extendable Towing Mirrors part # KS70103-04T for your 2015 Toyota Tundra but there are unfortunately not any maintenance procedures. I'd recommend using some spray lubricate to free the slide mechanism and then some grease to prevent it from sticking again. If this does not work, best option would be to replace the mirror, part # KS70103T for passenger or part # KS70104T for driver.
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The best towing mirrors for your 2018 Toyota Tundra are the K-Source Custom Extendable Towing Mirrors # KS70103-04T because they simply replace the factory mirrors on your truck while allowing you to keep the turn signals, powered adjustment and heated glass features that are on your OEM mirrors (keep in mind these features will only be available if your current mirrors already have them). The K-Source Custom Extendable Towing Mirrors # KS70103-04T are telescoping so you will be able to...
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Are K-Source Custom Towing Mirrors for 2010 Toyota Tundra High Quality
The K-Source Custom Extendable Towing Mirrors # KS70103-04T are a high-quality mirror though they are not exactly the same as the OEM mirrors from your 2010 Toyota Tundra. In regards to how close objects appear from the passenger side, I can only refer to a review on the product page from a customer who used these on their Tundra. I have added a cut out of that review for you which says the passenger's side mirror has an increase to how close objects appear. So if you were worried that...
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Do Custom Towing Mirrors for a 2017 Toyota Tundra have Blind Spot Sensors
The replacement towing mirrors that we have for your 2017 Toyota Tundra, # KS70131-32T and # KS70103-04T, have electric operation, heat, and turn signal functions but they do not have blind spot monitors so that feature would be lost. Depending on the location of the blind spot sensors you may be able to use universal towing mirrors # KS3990 and not lose that function. I have linked a video review of these mirrors for you.
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What Towing Mirrors do You Recommend for My 2011 Sequoia Limited?
Happy new year! As far as clip-on towing mirrors for your 2011 Toyota Sequoia Limited, we unfortunately do not have any clip-on style mirrors that will fit your vehicle. With that being said, for the best route, I recommend the K-Source Custom Extendable Towing Mirrors - Electric/Heat w Turn Signal - Textured Black # KS70103-04T (textured black) or # KS70131-32T (black and chrome). Unlike all other mirrors we carry, the K-Source Custom mirrors are confirmed to fit your Limited model....
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Are There Power Towing Mirrors for a 2007 Toyota Tundra Limited?
The towing mirrors we have will have electric mirror face movement, heat, and integrated turn signals with running lights. You can choose from black # KS70103-04T or chrome # KS70131-32T. These mirrors are able to be manually extended and manually folded close to the vehicle but do not have the power folding feature. There are some power folding mirrors for the newer Ram models but unfortunately nothing like that for your 2007 Toyota Tundra at this time from any of our manufacturers.
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Can Electric, Heated Towing Mirrors w/Turn Signals be Used if Factory Mirrors Do Not these Functions
The K-Source towing mirrors # KS70103-04T will fit your 2010 Toyota Tundra. Since your truck does not have heat or turn signals, those features will not work on the mirrors but the electric operation will still work. Another option is to go with some slip-on mirrors # CM11300. These are ideal for infrequent towing and are more cost effective than replacement mirrors.
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Availability of Custom Snap-On Towing Mirrors for 2018 Toyota Tundra Limited
We actually do have a set of custom snap-on towing mirrors for your 2018 Toyota Tundra Limited with the K-Source Snap & Zap # KS81300. These custom mirrors are confirmed to fit the factory mirrors on your Limited model Tundra and will work perfectly. It does look like when these particular mirrors first became available there was some conflicting information about their fit with the Limited and Platinum editions but the manufacturer as has since verified that they will fit both models. I...
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2018 Toyota Tundra Blind Spot Monitor Towing Mirror Compatibility
From what I've found online you can disable the blind spot monitor with buttons on your dash. They will reset each time to start your vehicle, so you would have to do it each time you start your vehicle which would be quite the hassle when you stop for gas to remove your tow mirrors like # KS3990 just to start your vehicle and hit the button so you don't get the light. If you want to mount towing mirrors like the K-Source Custom Extendable Towing Mirrors - Electric/Heat w Turn Signal...
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