I have an Android Head Unit car stereo in my 2022 Chevrolet and for about two months now it disconnects from Bluetooth every time I get to certain places in the city. It mainly happens when I drive near the shopping district, and I have to turn the car off and back on again for it to reconnect. Is it an interference problem or something's wrong with my unit?
It's probably interference. Commercial areas have a ton of WiFi signals, 4G/5G mobile networks, and other devices using the 2.4GHz band, which is exactly where Bluetooth operates. When there's a lot of frequency saturation, the car stereo loses the connection because your phone and the head unit can't maintain the pairing.
The first thing you can do is forget the device from the car stereo and re-pair your phone from scratch. Sometimes the stored data gets corrupted and a fresh connection works better. If it keeps disconnecting in those places anyway, try disabling WiFi on your phone while driving (if it's safe), because sometimes the phone tries to jump between networks and that causes conflicts with Bluetooth. Also update the head unit's firmware if there's an update available; manufacturers often release updates specifically to improve Bluetooth connection stability.
If none of that works, the car stereo's Bluetooth module might be starting to fail, though that's less likely if it only happens in certain places. In that case you'd need to have the module replaced or check if there's a loose cable connected to the head unit that's causing intermittent issues.
Something similar happened to me when I'd park my car near the shopping center in my neighborhood, and after looking into it a bit I found out my phone was automatically connecting to the public WiFi networks there, which was causing my Bluetooth to become unstable or drop completely. What worked for me was disabling automatic connection to open WiFi networks on my phone, so my Bluetooth stays more stable that way.
Besides that, I'd also recommend you try resetting the Bluetooth pairing between your phone and your car stereo: delete the device from the car stereo, forget the car stereo on your phone, and pair them again from scratch. Sometimes that fixes the connection conflicts that interference causes in those specific areas.
Does your phone automatically connect to WiFi networks in those areas? Because that's probably the culprit. When your phone latches onto a strong public WiFi (shopping malls have dozens of them), Bluetooth degrades quite a bit because both use the same 2.4GHz frequency and compete for bandwidth. Something similar happened to me with my car a while back: every time I went into the shopping mall the music would cut out, and it turned out my phone was automatically connecting to the mall's WiFi. The simplest solution is to disable automatic WiFi connection on your phone, or at least turn off WiFi when you're driving. You can also try re-pairing your phone with the car stereo (unpair and pair it again), because sometimes devices have memory issues when there's a lot of electromagnetic interference.
Log into answer.
