IS - 3rd Gen (2014-present) Discussion about the 2014+ model IS models

Rear diffuser with brake light

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Old Jan 22, 2021 | 07:09 PM
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Default Rear diffuser with brake light

Does anyone know where I can get one for a 2016 IS350 F Sport?
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Old Jan 22, 2021 | 08:11 PM
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Originally Posted by BlueLex350
Does anyone know where I can get one for a 2016 IS350 F Sport?
If you are referring to the rear deflectors that you have to wire up to your brake lights, ijdmtoy sells them for $70

https://store.ijdmtoy.com/products/l...tor-75-419-red
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Old Jan 22, 2021 | 10:46 PM
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Didn’t know you could replace the deflectors on the valance with ones that lit up. Very cool.
No I mean a diffuser to replace the valance and which has a break light in the middle of it, like this


I know Nia Auto Design has an attachment but it only fits the 2017 valance.
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Old Jan 23, 2021 | 11:45 AM
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Lexon had a rear diffuser with a 3rd brake light option. I'm not sure who is the best supplier to get this from though.
Attached Thumbnails Rear diffuser with brake light-lexon_diffuser.jpg  
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Old Jan 23, 2021 | 12:09 PM
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LEXON Rear Diffuser for Lexus IS 2014-20


ROWEN Rear Half Diffuser for Lexus IS 2013-20
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Old Jan 23, 2021 | 01:01 PM
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Originally Posted by BlueLex350
Does anyone know where I can get one for a 2016 IS350 F Sport?
You can swap out the 2016 rear diffuser for a 2017+ version and look into the Nia Auto diffuser add-on with a brake light.

https://www.niaautodesign.com/shop/l...017-2018-2019/
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Old Jan 24, 2021 | 09:21 AM
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What is the purpose of the 4th brake light? Just curious...
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Old Jan 25, 2021 | 08:02 AM
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Originally Posted by GaryJG
What is the purpose of the 4th brake light? Just curious...
Mostly a cosmetic thing... but it can be an added safety feature as well I guess. Kinda like replacing the lower rear reflectors with lights.



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Old Jan 25, 2021 | 08:47 AM
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Originally Posted by evltwn
You can swap out the 2016 rear diffuser for a 2017+ version and look into the Nia Auto diffuser add-on with a brake light.

https://www.niaautodesign.com/shop/l...017-2018-2019/

I was just going to ask this and see if it was interchangeable. This might be the cheaper route considering I’m in Canada.

Yes the brake light is more for cosmetics.
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Old Jan 25, 2021 | 11:04 PM
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I found this site. Not sure the quality of their products but they happen to sell 2 diffusers with break lights.

https://carbon-bits.com
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Old Jan 25, 2021 | 11:53 PM
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Originally Posted by GaryJG
What is the purpose of the 4th brake light? Just curious...

Subi guys would argue for safety and in some situations, it could be invaluable...i.e. thick fog, pouring rain, snow, etc.

What I always remember is cars with a 3rd brake light vs. Just tails were far less likely to get in accidents in comparison to 2 brake lights, thus almost all cars have a 3rd brake light now


One could argue, a 4th brake light could help in even more in avoiding rear end collisions
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