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expired Posted by scraejtp • Jul 1, 2025
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expired Posted by scraejtp • Jul 1, 2025

Comma 4th of July Sale: Vehicle/Car Harness $99, Comma 3X

+ Free Shipping

$799

$999

20% off
Comma.ai
112 Comments 38,269 Views
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Deal Details
Comma.ai is offering their Comma 4th of July Sale on their Comma 3X on sale for $799. Select/purchase an eligible harness to connect the Comma 3X to your vehicle for $99. Shipping is free.

Thanks to Community Member Cscraejtp for finding this deal

Note: use the drop down menu to select your vehicle/car harness. Upgrade to UPS 2-Day Air is available for additional $25

Includes:
  • Comma 3X
  • 1.5' Right Angle OBD-C Cable
  • 2 Standard Mounts
Features:
  • Qualcomm Snapdragon 845
  • 2160x1080 OLED Display
  • 128GB Internal Storage
  • WiFi/LTE/High Precision GPS Connectivity
  • IR LED Interior Night Vision Monitoring
  • CAN FD Vehicles Enabled
  • 3x 1080p Camera w/ 140 dB of Dynamic Range; Dual-Cam 360 Vision & Narrow Cam
  • OBC-C Port (USB-C w/ CAN) + USB 3.1 Gen 2 Port
Warranty
  • Includes 1-year limited warranty against hardware defects with purchase.

Editor's Notes

Written by Corwin | Staff
  • About the Deal
    • This offer is part of their Comma 4th of July Sale and $200 less than this previous +100 Frontpage Deal in November 2024.
    • The comma 3X is custom hardware designed to live in your car, and purpose built to run openpilot. The comma 3X has three beautiful HDR cameras, two cameras to watch the road and one night-vision camera to see inside the car.
    • Besides cameras, the comma 3X has a suite of connectivity and sensors including cellular LTE, Wi-Fi, an IMU, high-precision GPS, and microphones.
    • Ensure you select car/vehicle harness from the drop down menu; works with over 300+ cars [Check Compatibility]
    • 30-day money back trial with purchase
    • Get 1%-5% cash back on deals like this with a cash back credit card. Compare the available cash back credit cards here.
    • Please see the original post for additional details and give the WIKI and forum comments a read for helpful discussion.

Original Post

Written by scraejtp
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Comma.ai is offering their Comma 4th of July Sale on their Comma 3X on sale for $799. Select/purchase an eligible harness to connect the Comma 3X to your vehicle for $99. Shipping is free.

Thanks to Community Member Cscraejtp for finding this deal

Note: use the drop down menu to select your vehicle/car harness. Upgrade to UPS 2-Day Air is available for additional $25

Includes:
  • Comma 3X
  • 1.5' Right Angle OBD-C Cable
  • 2 Standard Mounts
Features:
  • Qualcomm Snapdragon 845
  • 2160x1080 OLED Display
  • 128GB Internal Storage
  • WiFi/LTE/High Precision GPS Connectivity
  • IR LED Interior Night Vision Monitoring
  • CAN FD Vehicles Enabled
  • 3x 1080p Camera w/ 140 dB of Dynamic Range; Dual-Cam 360 Vision & Narrow Cam
  • OBC-C Port (USB-C w/ CAN) + USB 3.1 Gen 2 Port
Warranty
  • Includes 1-year limited warranty against hardware defects with purchase.

Editor's Notes

Written by Corwin | Staff
  • About the Deal
    • This offer is part of their Comma 4th of July Sale and $200 less than this previous +100 Frontpage Deal in November 2024.
    • The comma 3X is custom hardware designed to live in your car, and purpose built to run openpilot. The comma 3X has three beautiful HDR cameras, two cameras to watch the road and one night-vision camera to see inside the car.
    • Besides cameras, the comma 3X has a suite of connectivity and sensors including cellular LTE, Wi-Fi, an IMU, high-precision GPS, and microphones.
    • Ensure you select car/vehicle harness from the drop down menu; works with over 300+ cars [Check Compatibility]
    • 30-day money back trial with purchase
    • Get 1%-5% cash back on deals like this with a cash back credit card. Compare the available cash back credit cards here.
    • Please see the original post for additional details and give the WIKI and forum comments a read for helpful discussion.

Original Post

Written by scraejtp

Community Voting

Deal Score
+95
Good Deal
Visit Comma.ai

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Top Comments

Speedracer
221 Posts
32 Reputation
I've had this device for over 15 months and it's been a game-changer for my 120 mile RT commute to San Diego 3 days per week. I use it on a 2022 Corolla Hybrid which is one of the most compatible cars with Comma (full start/stop). I've also used it on the occasional trip up to Northern California and it's been a god-send. I occasionally use it on my wife's 2019 Pilot as well as I bought an extra harness and power supply. For a long-distance commute, it really does take the edge off of driving. I find myself arriving at home and at work so much more relaxed. The benefit of my commute is it's mostly 50 miles of open driving on the I-5. I sit in the 3rd lane at 70mph and just let it do it's thing. A bit of traffic in the Carlsbad area is easily handled and cannot recommend this device enough.
CleverCrayon981
87 Posts
14 Reputation
Ya this isn't a product you wait for... Every freeway mile without it could be sooo much better. I bought at $3k and not one part of me wishes I waited.
Evan55
5877 Posts
1016 Reputation
yeah, not many people out there driving cars

111 Comments

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Jul 2, 2025
776 Posts
Joined Dec 2005
Jul 2, 2025
hiroo916
Jul 2, 2025
776 Posts
Quote from BeigeScene385 :
I don't think I've ever seen a thread so astroturfed
Point out which comments you think are astroturf versus natural grown real turf. Most of the comments seem legit user praise to me.
Jul 2, 2025
1,832 Posts
Joined Dec 2009
Jul 2, 2025
z32tt
Jul 2, 2025
1,832 Posts
Former comma user on a Toyota but now have Tesla with FSD. I'll start by saying that FSD is on another level compared to comma but even still, comma is LIGHT YEARS better than factory lane keep assist. I assure you this will totally blow your mind if you add this to a compatible car.
1
Jul 2, 2025
16 Posts
Joined Apr 2011
Jul 2, 2025
NickW
Jul 2, 2025
16 Posts
Quote from SpecialFX99 :
Am I missing something about you this? I looked up my car, found it was on the list but it says it adds lane assist and adaptive cruise control, but it only works on cars that came from from the factory with lane assist an adaptive cruise control. So what do you gain from this? I feel like I'm missing part of the story
Lookup people using it on YouTube
Jul 2, 2025
5,915 Posts
Joined Feb 2004
Jul 2, 2025
armedmetallica
Jul 2, 2025
5,915 Posts
My friend George Hotz started this! Wild to see it out there as a product.
1
Jul 2, 2025
153 Posts
Joined Mar 2010

This comment has been rated as unhelpful by Slickdeals users.

Jul 2, 2025
817 Posts
Joined Aug 2007
Jul 2, 2025
Copilots
Jul 2, 2025
817 Posts
Quote from SpecialFX99 :
Am I missing something about you this? I looked up my car, found it was on the list but it says it adds lane assist and adaptive cruise control, but it only works on cars that came from from the factory with lane assist an adaptive cruise control. So what do you gain from this? I feel like I'm missing part of the story
The factory one on my 2018 Clarity for example would never find the lane markers and when it did, it wouldn't keep them or stay in lane anyways. So with the added Comma, it's solid all the time, i can turn it on and it will find the lanes and keep me in the lanes. Adaptive also gets a major upgrade and in LA traffic it keeps me moving with out me having to really worry about the original systems delayed reposes to keeping up with the car in front of me. You need the Factory parts so the car has the ability to hack in to the cars computer to take over basically.
This is 100% upgrade and is reliable, unlike the factory one.
Jul 2, 2025
221 Posts
Joined Oct 2004
Jul 2, 2025
Speedracer
Jul 2, 2025
221 Posts
Quote from erol :
Hello Neighbour, how did you install it in your car. was it DIY? Does installing this voids car warranty? i have a honda accord 2020 and it has full honda warranty till 2028. i am thinking if getting this
Yes it's very DIY with some basic mechanical skills. I've brought my car in for service and I'll typically remove the plug-n-play wiring harness and power supply that plugs into the OBD port. All that is left is a USB cable and a windshield mount so it looks like a dashcam setup. I've also left the plug-n-play harness and just pushed the usb cable into the mirror housing panel. It should not void the warranty but I don't take those chances with the dealer and it's easy enough to uninstall 90% of it for peace of mind.

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Jul 2, 2025
221 Posts
Joined Oct 2004
Jul 2, 2025
Speedracer
Jul 2, 2025
221 Posts
Quote from SpecialFX99 :
Am I missing something about you this? I looked up my car, found it was on the list but it says it adds lane assist and adaptive cruise control, but it only works on cars that came from from the factory with lane assist an adaptive cruise control. So what do you gain from this? I feel like I'm missing part of the story
Yes it takes the over the existing adaptive cruise control and lane keep assist to the next level. Where you might have to manually intervene with the stock systems 20 times during a drive, with Comma/Openpilot that get's knocked down to 1 time or less.

Like someone else said, it's not really for urban/city driving but really shines on the highways with or without traffic.

FYI the system will not change lanes on its own but it will change lanes "automatically" if you signal and tug on the wheel. On some models will also use the existing blind spot assist to make sure lane is clear before changing.
Jul 2, 2025
704 Posts
Joined Jul 2006
Jul 2, 2025
mr_rolla
Jul 2, 2025
704 Posts
I've been using comma since the 1st gen device (2017). It works well enough as long as you have the right expectations. it's not full self driving. it's a driving "assistant" that helps increase the lane keep ability of your car. it'll take a bit of diy work to get it working, not quite plug and play. I don't mind using it because I can tolerate some tinkering/troubleshooting. I would never install one of these in my parents car (for example).Newer cars have caught up. New Hyundai HDA, Toyota TSS3, etc are just as good / almost as hands-off as what comma can do. I think we've hit a limit of whats possible with the limited sensor set.
1
Jul 2, 2025
372 Posts
Joined Nov 2018
Jul 2, 2025
madsci1016
Jul 2, 2025
372 Posts
Does it support stopping for red lights and stop signs yet? I feel like my car (VW Atlas and ID.4) already does everything up to that point natively.
Jul 2, 2025
146 Posts
Joined Apr 2013
Jul 2, 2025
TDIPWR
Jul 2, 2025
146 Posts
I have been using comma devices to drive my cars since 2019. I wouldn't have a car without it.

Having said that new features have slowed drastically. The last two years the software gets refined, but nothing really new has been added. Geohot always said they would be about a year behind Tesla, but that was nonsense. I'm very disappointed stop lights and stop signs aren't fully supported by now.
Jul 2, 2025
115 Posts
Joined Nov 2014
Jul 2, 2025
goducs11
Jul 2, 2025
115 Posts
Quote from SiavashS :
comparing comma ai with Tesla's FSD is very misleading. Given how poorly Tesla's FSD acts at times, I'm not sure if it really worths spending so much money just to get a better ADAS than what my car already has.
I have a Tesla model 3 on the older hardware 3 software and it is pretty amazing honestly. I rarely have to intervene and when I do it is because I feel uncomfortable not because the car is doing something wrong.

Like any driver it can have issues but what it can accomplish is amazing and I have nothing but positives to say about it.
Jul 2, 2025
142 Posts
Joined Sep 2011
Jul 2, 2025
ScoobyDoo27
Jul 2, 2025
142 Posts
Quote from Timless :
it's been on the market for years. Hotz isn't even involved with it anymore.
Umm, yes he is... He is active in the community and is apart of the company.
Jul 2, 2025
141 Posts
Joined Nov 2006
Jul 2, 2025
Mr. Pute
Jul 2, 2025
141 Posts
Thanks for posting this! Mine was delivered two weeks ago, so it's still in the return window. I've opened a ticket to see if I can get a price adjustment. If not, I'll re-buy and return.

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Jul 2, 2025
716 Posts
Joined Aug 2012
Jul 2, 2025
BitORealPanther
Jul 2, 2025
716 Posts
Quote from xdz :
No BMW sigh
I'm sighing for you. It's an exceedingly rare day that Porsche owners can feel like they are getting a great value, but BMW went and redefined the entire landscape on sleaze with the $19/month subscription for heated seats. That are already installed. Talk about a 'kidney' (grill) punch!
1

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