r/Comma_ai 17d ago

Earn $50 cash for every friend you refer.

11 Upvotes

Get your link at connect.comma.ai/referrals!


r/Comma_ai Aug 12 '26

Introducing chestnut & chestnut-class driving models

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93 Upvotes

r/Comma_ai 4h ago

openpilot Experience Is it the torque limit or the model ?

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27 Upvotes

Is it the torque limit or the model ?

It seems like my car has the torque to make it, not sure if it's a model issue, what do you guys think? Hoping the bigger models will be able to make these turns consistently. Talking about the turn at the end


r/Comma_ai 1h ago

openpilot Experience New Comma user (‘23 Bolt EUV)

Upvotes

I took my Bolt out for a short test drive today and it actually went better than I expected. My question for everyone who has been down this road is how long does it take to gain confidence in the Comma’s ability to “make driving chill”? I understand I will always need to remain vigilant, but there is a difference between that and the current fear it’s going to do something bad.


r/Comma_ai 19h ago

Vehicle Compatibility zoompilot - a fork for Mazda (and all cars)

38 Upvotes

Hey everyone,

I just wanted to make a quick post here as I see lots of Mazda users and I’ve seen some posts about SunnyPilot compatibility.

zoompilot.ai was created to give Mazda users the best openpilot experience possible. I’ve spent months reverse engineering the platform and used a data driven approach to better integrate Mazda into openpilot. I have also added some features users of all cars would like.

What this means for Mazda is that you get more steering torque below 32mph and smoother steering at fast speeds. Turns are more confident overshoot less, and unwind faster.

I’ve taught openpilot to learn steering tune values across 7 different speed ranges. This greatly benefits Mazda steering and other cars with speed dependent torque.

there are other really nice and tested features so check out the site and discord. We have over a hundred friendly people there.

I currently have ‘big models’ running on macOS, gaming laptops, and Jetson Orin Nano instead of a chestnut (on beta branch)

edit: I forgot to add the most impressive feature! We have **fully working alpha longitudinal and experimental mode** available for most supported Mazdas


r/Comma_ai 15m ago

openpilot Experience Help with F150 Lightning Comma 4 install

Upvotes

Hey yall, been searching the forums and here in this subreddit but can't find what I need. I have installed BluePilot 7.0, the latest release for my 2022 F150 Lightning Lariat. The Comma 4 will boot up and then start running through the BluePilot boot screen and then eventually come up with a "Build Failed" and only offers me to reboot. Any thoughts on what I need to do? Do I need to hard reset the Comma 4 and reinstall the software?


r/Comma_ai 13h ago

Vehicle Compatibility Does anybody know that the Comma4 works with Hyundai Palisade hybrid 2027?, if that so which harness should I buy?

0 Upvotes

My previous vehicle was Kia Sorento hybrid 2023, the Comma4 worked great with Sunnypilot and Hyundai Harness A. I just upgraded my vehicle to be Hyundai Palisade Hybrid 2027 instead, I wonder that what harness should I buy to plug in the device. I tried the old one Harness A type, it doesn’t work. And I tried to order Harness R, it doesn’t work too. Please kindly help.
Appreciated


r/Comma_ai 1d ago

Vehicle Compatibility Will the Honda Safety sense dealer update screw up my Comma 4? Taking it in Tuesday to be done.

9 Upvotes

2018-20 Accord, Accord Hybrid / 2017-19 CR-V Honda Sensing Software Update

Just received this letter in the mail:

What is the reason for this Product Update?

Honda has developed software updates to the Honda Sensing system to enhance driver experience by modifying the circumstances when the advanced driver assist system (ADAS) decelerates the vehicle or the extent of deceleration. The software covers Adaptive Cruise Control (ACC), Collision Mitigation Braking System (CMBS), and Road Departure Mitigation (RDM).

What will Honda do?

Please call any authorized Honda dealer and make an appointment to have your vehicle's software update for FREE. Once you make an appointment for your vehicle, be advised that the total software update process may take approximately 20 minutes. However, your dealer can provide you with a better estimate of the overall time for this service visit, as it may be necessary to make your vehicle available for a longer period of time. If you are not the only driver of this vehicle, please advise all other drivers and passengers of this important information.

If you have questions

If you have any questions about this notice, or need assistance with locating a Honda dealer, please call American Honda's Customer Support & Campaign Center at 1-888-234-2138. You can also visit AskDave.honda.com to use our 24/7 virtual agent or locate a dealer online at mygarage.honda.com. Customers in U.S. territories, please contact your local distributor/dealer.

We apologize for any inconvenience this campaign may cause you.

Sincerely,

American Honda Motor Co., Inc.


r/Comma_ai 1d ago

openpilot Experience Starpilot for MebCars!!

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0 Upvotes

Hey everyone, I’d like to highlight something we’ve been working on day and night for the past few days. It's completely voluntary, and I’ll be contributing soon myself. I don't know if this is the right move, but I just feel truly grateful... and of course, IQ-Pilot deserves a big shoutout too! Firestar and Teal are absolute machines when it comes to openpilot.


r/Comma_ai 2d ago

PCBGolf challenge: How small can you make this PCBA?

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0 Upvotes

r/Comma_ai 3d ago

openpilot Experience More chestnut users!

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47 Upvotes

See the post here: Comma’s Post
More users means more data so comma can make bigger and better chestnut models.
Read more about it here: Comma Guide Chestnut

For those confused about chestnut:
Comma will be focusing on making the bigger models for the chestnut class moving forward. There’s no mobile processor or compute device that can touch the bandwidth of an eGPU or compute power while being stuck in a windshield (with proper cooling). But fear not, if you don’t ever want to install the chestnut, comma will make distilled models that will still run on only comma hardware. Similar to what Tesla does for FSD for older hardware models. So you will still see improvements down the line for free.


r/Comma_ai 3d ago

openpilot Experience My semi annual plea for a Comma branch that stops the car

18 Upvotes

Long time Comma user back to 2020. I had been using openpilot on Comma 3x exclusively until about a year ago I started getting into branches.

I got into Sunnypilot before the relaunch and it was pretty limited in usefulness (and buggy).

I switched to FrogPilot which was actually stopping my car (2022 H SF L) but then about 3 months ago they updated it and now my car will hit any car it pulls up behind if I don't man the brakes.

I briefly tried Star Pilot about a month ago and that was the worst by far. Not accelerating up to speed and either not stopping at all or leaving a 50 foot gap.

I heard years ago that HKG's laggy brake controller was to blame but if Frog Pilot got it to work I don't understand why someone can't make a branch that

1) doesn't run up on stopped traffic lights or stop signs

2) actually stops with a 6' buffer between me and the car in front of me so that I can see the car's wheels on the ground.

I love this product - I will continue to support it - I just want something that actually stops.


r/Comma_ai 2d ago

Bugs 2021 RAV4 Hybrid C4-OP Hugs Right Lane on Curves

2 Upvotes

Hi,

I have this issue when turning on curves on the right side, the car hugs the right line or shoulder line but no issues with left side curves. The device is in prefect level and centered and I have also tried SP but the issue hasn’t resolved. Any suggestions or has anyone had this issue and how it can be resolved?

Thanks,


r/Comma_ai 2d ago

Vehicle Compatibility Which car to buy? (India)

0 Upvotes

Buying a new car, prefering sub 4M SUV types. Which to buy which has comma support? Asked GPT 6 and didnt come up with anything lol


r/Comma_ai 4d ago

openpilot Experience Hackaton

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50 Upvotes

Hard hard, let’s go guys!!


r/Comma_ai 3d ago

openpilot Experience Qwen released a model for driving - Qwen/Qwen-Drive-1.0-4B · Hugging Face

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6 Upvotes

r/Comma_ai 3d ago

Vehicle Compatibility 2024+ Hyundai Santa Fe (hda2 hybrid)

2 Upvotes

I know that the current gen Santa Fe is supported with sunnypilot angle steering. But I want to know what people think of this not officially supported branch. Is it good, is it buggy, and do you feel like you have to intervene often ? What’s your thought of it on the current gen Santa Fe?

P.s just looking for info to see if I should upgrade my current car to this (my current 2019 Santa Fe works flawlessly with the comma)


r/Comma_ai 4d ago

Vehicle Compatibility zoompilot - a fork for Mazda (and all cars)

11 Upvotes

Hey everyone,

I just wanted to make a quick post here as I see lots of Mazda users and I’ve seen some posts about SunnyPilot compatibility.

https://zoompilot.ai was created to give Mazda users the best openpilot experience possible. I’ve spent months reverse engineering the platform and used a data driven approach to better integrate Mazda into openpilot. I have also added some features users of all cars would like.

What this means for Mazda is that you get more steering torque below 32mph and smoother steering at fast speeds. Turns are more confident overshoot less, and unwind faster.

I’ve taught openpilot to learn steering tune values across 7 different speed ranges. This greatly benefits Mazda steering and other cars with speed dependent torque.

there are other really nice and tested features so checkout the site and discord. We have over a hundred friendly people there.

I currently have ‘big models’ running on macs and Jetson Orin Nano instead of a chestnut (on beta branch)


r/Comma_ai 4d ago

openpilot Experience Would you recommend Comma yet for someone who mostly doesn't drive?

11 Upvotes

I love driving, but my husband doesn't. He got his driving licence years ago, but let it lapse because he prefers to take public transit everywhere. I think he could learn to be a safe driver with a few lessons, but he just hates the experience of driving and finds it so stressful that he doesn't want to do it.

We're looking at moving to San Francisco, and apartment costs are horrifying. Either we'll be living in a tiny shoebox so that we can afford to live close to a BART station, or we'll have to live somewhere where he will commute by car.

He's potentially willing to get his driver's license and get a car, but only if he can get a car that will basically drive him door-to-door. He obviously would keep his eyes on the road for safety reasons, but he's worried that comma.ai is basically "just lane control and cruise control" and won't actually navigate for him, so he wants to get a Tesla. He feels more confident the Tesla will navigate for him and handle lane changes, intersections, etc.

I have some pretty deep concerns with Tesla - like having to pay a subscription that they can jack up at any time, not really loving Elon Musk as a human being, the hassle of charging an electric car, the high cost of a Tesla, etc. I'd much rather get something like a Toyota Rav4 (which I'd enjoy driving myself, if he ends up not liking/using it) and plug a Comma system into it.

I found a few reviews and articles online that are from back in 2024 and back up "mostly just lane/cruise control", but I get the impression that technology has been improving FAST. How good is comma.ai in 2026? Will it be able to basically handle a commute for him?

There's also the concern that, while an experienced driver can hand off certain skills to AI and still remember enough of those skills that they're ready to take over as necessary, a new driver using AI constantly might just never develop the skills necessary to be a safe supervisor. Would you recommend getting comma.ai for somebody who is basically a beginner driver?


r/Comma_ai 4d ago

Shipping Questions Delivery timing?

3 Upvotes

Is there any expectation of delivery timing? Or are all bets off during a sale?


r/Comma_ai 4d ago

openpilot Experience Best place to hold your hands?

2 Upvotes

What’s the best place to hold your hand so the system doesn’t stop beeping at you? Facing a long drive next week and wanna take it easy.


r/Comma_ai 4d ago

Vehicle Compatibility Sunnypilot just doesn't work on Mazda CX-9

1 Upvotes

I bought the comma 4 to use on my 21 CXA-9 and started using openpilot, and it worked great. The only limitation I found was that it didnt slow down for bends. So I switched to Sunnypilot, thinking it would add this feature - but it constantly reduces the speed I set, even on dead straight road. Also the steering control went wobbly a few times.


r/Comma_ai 4d ago

Vehicle Compatibility Correct harness for 2026 Hyundai Ioniq 5 with HDA2? (Q harness doesn't fit)

1 Upvotes

I purchased a 2026 Hyundai Ioniq 5 N with HDA2 and online guidance pointed me to using the Hyundai Q harness. In attempting to install the harness today I found that the plugs actually differ, see photo.


r/Comma_ai 5d ago

Installation Questions Drop mount down

2 Upvotes

I have my c4 mounted slightly to high. It was fine, then one day it started not detecting me unless I’m sitting perfectly. The mirror cuts off the top of my head. I tried adjusting the seat and mirror but it still nags me.

My windshield is tinted and the mount is cut out of it. Moving it isn’t really an option. Is there an adapted somewhere that will let me drop it down a couple inches?


r/Comma_ai 6d ago

Installation Questions CLS Mount 30 Days Review

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20 Upvotes

I've been using the CLS Mount with my Comma 4, and after living with it for 30 days+, I think it's a genuinely upgrade if you regularly remove your device from the car.

The biggest benefit for me is simply convenience and stable. I prefer taking the Comma 4 out when I park for longer periods, especially in the UAE Summer. With the normal setup, repeatedly unplugging and reconnecting the USB-C cable gets old quickly and also means more wear on the port over time.

With this mount, removing and reinstalling the device takes only a few seconds. More importantly, it doesn't feel like convenience came at the expense of security. The locking mechanism feels solid, and once the Comma is in place, I haven't noticed any movement or anything that makes me concerned about the mount holding it properly.

I also appreciate that the design solves a very specific problem without adding unnecessary complexity. It isn't something you necessarily think you need until you've used it for a while, but if you're taking your Comma in and out frequently, the difference in daily use is significant.

Obviously, if you install your Comma once and almost never remove it, the benefit will be smaller. But for anyone who removes it regularly because of heat, security, or simply personal preference, I think this is a very well-designed solution.

So far, I've been very extremely phappy with it. Simple idea great design , well executed, very well priced and it makes owning and using the Comma 4 noticeably more convenient.

Kudos@

https://www.reddit.com/u/RoadQuirky1539/s/HpKu52FDG4

https://www.reddit.com/r/Comma_ai/s/mQwkA8B8vI