I was in my garage standing next to my car, had just pulled into the garage. With my keys in my pocket and the doors unlocked, the doors locked themselves after 30 or so seconds. Thinking maybe I pushed the lock button inadvertently, I unlocked the doors.. only for them to lock again. Mind you, there was no beep to indicate the button had been pushed. I unlock again and again the doors lock with no beep. Now I’m freaking out a little. I take the keys out of my pocket, sit them on the roof of the car and it happens again! Is this normal? I don’t recall experiencing this before.

Is your fob lock button stuck? Does your spare fob do the same thing? If it isn't a fob issue, the most likely culprit is a bad cylinder switch in the driver's door.

If you unlock your car but don't get in, it will lock in 30 or so seconds. If that's what you are describing, mine does this too. If I want to leave my car unlocked but change my mind about getting in, I just open the drivers side door and close it. Don't touch the fob again.

Think of it as a safety feature; one I quite like if I'm being honest.

Ilya wrote: ↑

Tue Oct 17, 2023 8:16 pm

If you unlock your car but don't get in, it will lock in 30 or so seconds. If that's what you are describing, mine does this too. If I want to leave my car unlocked but change my mind about getting in, I just open the drivers side door and close it. Don't touch the fob again.

Think of it as a safety feature; one I quite like if I'm being honest.

That's exactly what I experienced. I never noticed that before. Thought my car was haunted!

Big_Tone wrote: ↑

Tue Oct 17, 2023 4:03 pm

Thinking maybe I pushed the lock button inadvertently, I unlocked the doors.. only for them to lock again.

I inferred from your original post that it was locking immediately after the first 30 second episode. If it always does it after the 30 expires, Ilya has it right, it's a feature. If it re-locks immediately, that means something is wrong.

Big_Tone wrote: ↑

Wed Oct 18, 2023 10:51 am

Ilya wrote: ↑

Tue Oct 17, 2023 8:16 pm

If you unlock your car but don't get in, it will lock in 30 or so seconds. If that's what you are describing, mine does this too. If I want to leave my car unlocked but change my mind about getting in, I just open the drivers side door and close it. Don't touch the fob again.

Think of it as a safety feature; one I quite like if I'm being honest.

That's exactly what I experienced. I never noticed that before. Thought my car was haunted!

Hahah...nah, expected. My car is haunted though.

Now that I live in a climate which gets cooler than FL, my car has started up with it's random alarm issue again. I swear it has to do with the temperature cause I was plagued by it while living in NY, didn't have much of a problem in FL for 2.5 years, and now 2 months into living in NC it's starting again.

The car is rarely used and I keep it on a battery tender. Just now I ran an errand with it, got home and within 5 minutes of parking it the alarm went off randomly.

Nissan's door cylinder switches are a very common problem with mystery alarms and rolled-down windows in the rain. They also tend to misbehave worse with cold temperatures, especially coupled with wet conditions.

VStar650CL wrote: ↑

Wed Oct 18, 2023 12:37 pm

Nissan's door cylinder switches are a very common problem with mystery alarms and rolled-down windows in the rain. They also tend to misbehave worse with cold temperatures, especially coupled with wet conditions.

Is that switch the one that pushes in with your thumb on the door jam? Or is it in the door somewhere or the lock itself?

Most of the early ones were stand-alones attached to the door cylinder itself, later ones are inside the lock assembly and connected to the cylinder by a linkage rod. I'd expect the OP's '11 to have the latter, so you'd replace the lock assembly.

VStar650CL wrote: ↑

Wed Oct 18, 2023 1:39 pm

Most of the early ones were stand-alones attached to the door cylinder itself, later ones are inside the lock assembly and connected to the cylinder by a linkage rod. I'd expect the OP's '11 to have the latter, so you'd replace the lock assembly.

Ahh, gotcha. That sounds expensive...since you'd have to recut keys, etc.

No, even on the ones that are directly attached, the switch is a separate piece. On the later stuff the expense is in the cost of the lock/latch assembly, but it's attached by a linkage rod so the cylinder is unchanged. There's no rekeying, just a new lock.

VStar650CL wrote: ↑

Wed Oct 18, 2023 5:23 pm

No, even on the ones that are directly attached, the switch is a separate piece. On the later stuff the expense is in the cost of the lock/latch assembly, but it's attached by a linkage rod so the cylinder is unchanged. There's no rekeying, just a new lock.

Ahh, gotcha.