Ford Super Duty Tow Mirror Heated Lower Glass Upgrade Kit (2017-2022)
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This kit is to allow you to add heated lower glass to vehicles not originally equipped. The kit comes with both pieces of glass, as well as the required adapter harness. Boost Auto Parts offers a full range of replacement tow mirror lower glass compatible with all OEM and aftermarket Super Duty mirrors. These fit OEM 2017-2022 F250/F350 Superduty mirrors.
This glass has the backing which will snap onto OEM and aftermarket mirrors. The glass is equipped with defrost.
Cross References to Ford OEM numbers: FL3Z-17K707-J & FL3Z-17K707-K & FL3Z-17K707-U & FL3Z-17K707-V
Link to installation video: https://youtu.be/Ef7eakuNOSs
This mirror glass fits the below OEM applications and is compatible with similar aftermarket mirrors fitted for other generations (including Powerstroke).
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Tow mirrors
Awesome

Excellent service
Fast shipping, accurate description, competitive prices, easy to reach. Will definitely recommend.

Perfect OEM Replacement
Customer service was excellent, and my online order was filled and shipped quickly. These mirrors are a perfect replacement for the Ford OEM ones.

2017 f350 tow mirror parts
Excellent. The parts came quickly and after viewing the video on installation I was easily able to install all of the parts I received. All of the images in the large portion of the mirror appears warped but bottom line is I can see and I will replace the large part with original equipment at some point. Thank you boost auto parts for saving me a ton of money By having those pieces there for me to purchase. It would have cost $1500 to replace the mirror and by rebuilding the mirror with your parts I saved a ton of money.

Haven't needed to use the heated upper and lower glass yet but I am confident that they will work if not I'll come back and post a revised review