Sealion 7 weak network signal

fooozbazzii | 2026-01-08 10:51 | 31 views

Hello, Our 1 month old BYD Sealion 7 is dealing with weak network signal issues. I know.. Solution is to reset the system via. The volume button. This works fine. For an hour. Then we are back at the same problem. We are resetting several times a day, every day, for weeks. There has been snow here for a week, and it is below 0 degrees. Sucks very much that I cannot preheat my car at all. Having an app to preheat my car was a major persuasion to buy an EV. I have tried contacting the BYD service department, but they do not have a solution for me, other than resetting. After weeks of frustrations, I am getting to the point where I am actively advising my peers against buying BYD cars. Anyone experiencing anything similar, or know what to do? If not, I guess I will need to find another car.

Comments (14)

Eastern37 2026-01-08 10:56

Try taking out the sim card and putting it back in. That fixed a similar issue in my Atto 3 a couple years ago, haven't had issues since. Not sure how easy it is to get to on your car, the Atto 3 has it behind a panel in the passenger foot well.

Panklas 2026-01-08 11:45

Im quite sure it's the 3.10/3.0 version which did this I have the exact same issue (S7 Excellence)

JuanSmittjr 2026-01-08 13:53

Yes very annoying. I have to go so close to my car it's better to sit in and start heating manually.

SnooAbbreviations901 2026-01-08 16:20

Same issue in Europe with Sealion 7.

Simple_Equipment4811 2026-01-08 20:08

I noticed in my sealion7 that if u turn on the car via the key the signal came back strong. If I leave it overnight, the morning after I can’t use the app, I have to go in Bluetooth range or old the key to turn on the car.

SantiGutierrez1970 2026-01-08 20:34

Not easy in SL7

SantiGutierrez1970 2026-01-08 20:35

Same here 👋🏻

SantiGutierrez1970 2026-01-08 20:35

Yap

tamboerke 2026-01-09 06:13

Same issue for me in the Netherlands. V3.0.1 Snow and below zero temperatures. Car is losing 4G connection all the time. It is in the street in a city environment with good 4G coverage.When thee car is started once, it seems that reception is better.

Consistent-Basis8452 2026-01-09 06:20

I'm my atto2, I have exactly the opposite experience, I can access the car in my garage underground where the is no mobile connection on my phone, maybe it's more to do with the SIM they supply locally rather than the car?

fooozbazzii 2026-01-09 07:28

This actually helped! I unlocked my car, and locked it, with the key fob, then after a few seconds I was able to turn on the heating through the app. Thanks! Still annoying that the scheduling does not work. But I guess I need to adjust my morning routine by waking up earlier, open/lock doors with fob from the window, then go to app and heat the car. But better than nothing.

WinterBarnacles 2026-01-09 10:11

It's a fault, if you can't fix it yourself take it back to the dealer who sold it to you and get it fixed. I had a temporary problem, then I tried to take the sim card out (easy to do in the Seal, I think it's harder with the Sealion) and while I was futzing with it it fixed itself. I took it to the dealer and they took the sim card out and cleaned it and put it back in and I haven't had the problem recur since (touch wood).

colonelmattyman 2026-01-10 06:05

How's the tbox? Maybe take it in and get it checked out. Tbox's in the SL7 and Sharks in Australia have been failing.

Chubtor 2026-01-12 12:34

I have this when I try and preheat via app, it's says poor network. Then I try again and it works fine.

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