When i open the bonnet to check coolent level and close the bonnet properly. But bonnet open warning alarm on dash

Post:
Hi everyone,
I have a problem with my BMW E87 — the warning light for an unfastened passenger seat belt is always on. It shows the seatbelt and airbag light even when there’s no one sitting in the passenger seat.
I already disconnected and reconnected the plug under the passenger seat, but it didn’t help. I also disconnected the battery (and even replaced it with a new one), but the warning still stays on.
Does anyone know what else I can check? Could it be the seat occupancy sensor (mat) that’s faulty?

Thanks in advance for any advice!

I have these warning lights on every time I start the car. They reset after a while, but there’s no specific time — it can be 5 minutes, or sometimes they don’t reset the whole day. It doesn’t depend on the weather, whether it’s hot or cold. I’ve replaced the ABS sensor and the ABS ring. Can you help me figure out what it could be?
I should mention that while the warning lights are on, until they reset, I have no driver control over the windows, wipers, or sunroof.

, le tableau de bord ne s'allume plus, et la voiture ne démarre plus. J'ai vérifié tous les fusibles et ils sont OK.

Hello. Vehicle is sometimes losing power during accelerating. The revs fly up as if i had the clutch engaged, and then drop again. Happens usually around 2500rpm.