Bluetooth car audio not automatically connecting after UI 8 update

[Twodoor]

This is in response to user: Guitarman2048 in another Samsung forum found at this website:
https://eu.community.samsung.com/t5/galaxy-s24-series/bluetooth-connection-issues-after-one-ui-8-0-u...

I too am having problems connecting to the BlueTooth Audio from the S24 to my Mazada 3. The phone bluetooth connects, but the audio does not automatically connect as it used to in UI 7. Every time I start the car I have to start the audio playing on the cellphone (if the audio is not playing the bluetooth will never connect for audio. This used to work in UI 7 whether the audio was playing or not), then on the S24, go to bluetooth, go to the device (Mazda), select details and wait to see if it will connect to the audio. If it takes too long and the Mazada stops scanning, I have to turn off the car and try again. It seems like all my other bluetooth devices are working, but none connecting automatically. Something in UI 8 broke this function.

I have tried deleting the devices, re-pairing, resetting the networks, clearing cache, starting in safe mode, and I can't remember every thing else I've tried, but no go.

SAMSUNG, PLEASE FIX THIS!!! Better yet, give us a way to roll back the UI to a previous version that worked.

Once this is fixed, and everything is working, you can bet I'll be turning off automatic updates. Just like I have my computers setup to absolutely NO auto updates.

One last thing. I refuse to factory reset my phone over something like this, so please do not recommend that option. Fix the problem and send out a patch or a new UI.

After almost two days of troubleshooting this is what I found for my situation.
October 08, 2025

Hi,

I found that by going to Bluetooth, viewing the Bluetooth devices, and going to detail view for the car connection, the phone connection is turned on, but the audio is turned off. When I turn it on, it immediately turns off again. I turn it back on, and it immediately turns off. I have to do that 3 or 4 times before it stays on. However, by the time I win the on/off battle, the Bluetooth scan that the car is doing times out and I have to turn off the key and restart the car to get the Bluetooth scan to work again. The only way I can get it to work, somewhat consistently, is to have the audio playing on the phone, then start the engine, set the car radio control to Auxiliary, and while the car is scanning for a Bluetooth connection I have to quickly go the Bluetooth settings, details for the device and then turn the audio on, it turns itself on, I turn it back on, it turns itself off, I turn it back on and usually the third time I turn it back on, the audio connects. I have to do this every time I start the car. It no longer connects automatically. I have a 2010 Mazda 3, so that's long before Android was built into the cars. Bluetooth is an auxiliary function of the car's audio system. It's just simple Bluetooth that use to work great, and now it doesn't. Shame on you Samsung!!!

UI 8 broke this functionality and I or we have not heard a peep from you about a fix. Everything worked fine when using UI 7.

[DaveOnSamsung]

2010 Mazda 3 here, same issue. I just read another comment on this thread, Samsung saying "upgrade your car" as a response. This is ridiculous, and I wonder if it is legal?

[mstrdmanic]

I got a new car and they told me the same thing. I said my car is brand new!

[DaveOnSamsung]

Ok, I made today my "fix Samsung UI trash day", I went on nice and calm. 

I started by following the repeated suggestions from here, Reddit, blog posts, YT, etc. Not much in addition to the suggestions on this thread, but I have it all a try a second time, one by one. None of people's suggestions worked for me the other day, but I've found something that now works - with a little practice and patience.

For my 2010 Mazda M3, this works, in exactly this config/order:

Phone prep:

- follow the dev mode above to switch back to v1.3, also follow the "delete wifi/ Bluetooth network" advice

- restart phone

- turn off phone wifi

- Bluetooth pair the car and phone, ignore that it doesn't work properly

Car prep:

- when you leave your car, turn off the stereo

When you get in your car:

- turn car on

- straight away, open phone Bluetooth "details" settings for the already paired phone, toggle "Audio" to on. Ignore if this doesn't work right away

- turn car stereo on, it might not be in Bluetooth mode, switch it to BT mode. Ignore if this doesn't seem to connect and rests on "searching" for a while

- on your phone, still on the BT details settings for the paired car connection, keep turning "Audio" to on, it may turn off again, keep enabling it, this may happen several times

- switch to your phone media app, mine is spotify usually, and play media

- wait. Be patient. Think of it like making your morning coffee routine

At this point, it should connect properly, and stay connected. YMMV on the number of times you need to toggle "Audio" setting on, but doing things in this order seems to give both the car and phone time and sequence to sort themselves out. 

May the force be with you. 

Samsung, fix this elitist bug. 

[Rudykmz]

How do you delete wifi/bluetooth network advice?

[DaveOnSamsung]

Ok, I made today my "fix Samsung UI trash day", I went in nice and calm. 

I started by following the repeated suggestions from here, Reddit, blog posts, YT, etc. Not much in addition to the suggestions on this thread, but I gave it all a try a second time, one by one. None of people's suggestions worked for me the other day, but I've found something that now works - with a little practice and patience.

For my 2010 Mazda M3, this works, in exactly this config/order:

Phone prep:

- follow the dev mode advice to switch back to v1.3, also follow the "delete wifi/ Bluetooth network" advice

- restart phone

- turn off phone wifi

- Bluetooth pair the car and phone, ignore that it doesn't work properly

Car prep:

- when you leave your car, turn off the stereo

When you get in your car:

- turn car on

- straight away, open phone Bluetooth "details" settings for the already paired phone, toggle "Audio" to on. Ignore if this doesn't work right away

- turn car stereo on, it might not be in Bluetooth mode, switch it to BT mode. Ignore if this doesn't seem to connect and rests on "searching" for a while

- on your phone, still on the BT details settings for the paired car connection, keep turning "Audio" to on, it may turn off again, keep enabling it, this may happen several times

- switch to your phone media app, mine is spotify usually, and play media

- wait. Be patient. Think of it like making your morning coffee routine

At this point, it should connect properly, and stay connected. YMMV on the number of times you need to toggle "Audio" setting on, but doing things in this order seems to give both the car and phone time and sequence to sort themselves out. 

May the force be with you. 

Samsung, fix this elitist bug. I'm not buying a smart vehicle to support your lack of attention to your existing customers. Reminder: the 'U' in 'One UI' stands for 'User', you know, us, your customers. Not a phone, not a smart car, not an engineering sprint, not showing that you're innovative with new features. User. People. Your customers. 

[tzitzitlini]

Same here, Mitsubishi Triton and Samsung s23ultra, the update **bleep** it

[wardie]

Same problem with my A53

[mbmcnicol]

Similar issue with me.

Phone: S24 Ultra

Car stereo: stock Rockford Fosgate in a 2011 Mitsubishi RVR GT.

On UI7 I could just get in my car and go.  Phone and stereo would connect, and if the last thing I was listening to was music, then it'd just play.

On UI8, my phone "connects" (phone says it's connected, sometimes "for calls" and sometimes "for calls and audio," once in a blue moon "for audio" only).  Car says "B NO CONNECT."  If I go in to settings on my phone and turn audio off and on, it will then connect (about 90% of the time).

I reached out yo Samsung, they gave me some pretty poor instructions on clearing the cache for bluetooth and resetting my network settings to default.  I did those, as well as deleted my phone from the car stereo and deleted my stereo from my phone, then re-paired fresh.  Nothing helped.

And, surprise surprise, the reply I got from Samsung didn't include any way to report back on the status of my issue. 

I suggest everyone with this issue to report it to Samsung, and make sure to include an exhaustive list of troubleshooting steps you've taken.  The squeaky wheel gets the grease, and clearly there is something wrong with the update.

[Scotty656]

So my dads brand new Chev has no issues with it. But the other older cars in my family all have the same issue. Good one Samsung. Such a waste of time.

[AndreaM]

I got a brand new car in September and everything was working fine until last Saturday 12/6 > I was in a call while driving and it just cut out and the audio has not worked since on my phone. It did this ui8 update on 11/20. I've uninstalled and reinstalled and forgot reset the connection for the Bluetooth and the Wi-Fi and Android auto and I've wiped all the caches over and over and over again and turned my phone off and on my car off and on and it's honestly exasperating because nothing fixes it and there's no way to do a phone call through the car now. It's illegal in Chicago to touch your phone while you're driving so it's actually really dangerous to even try to answer a phone call but sometimes I am in traffic for over an hour and I have to speak to my work or my partner. Samsung needs to fix this!