Trunk delay

2025 KIA FORTE
300 MILES
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ALYLAROSA485
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So I have a brand new 2025 k4 with only about 300miles on it and I noticed I have an intermittent issue with my trunk. So yesterday I pressed down the trunk button on my key fob and I heard the beep and click as if my trunk were unlatching but it remained closed. It wasn't until the third attempt that it finally opened . Now it's working just fine but there's certain times I'll press the fob and it doesn't unlatch or only partially lifts when trunk is popped. Any ide what the issue could be?
Sep 22, 2025 at 8:43 AM
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STRAILER
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Yep, I would use WD40 on the trunk latch to see if that helps. The electric actuator may be slightly misaligned or stiff from the factory. Sometimes they loosen up after a bit of use. Please upload a video of the problem in your response so I can see?
Sep 22, 2025 at 5:16 PM
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ALYLAROSA485
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After the third time hitting button it released slowly without fully lifting. I rarely use my trunk maybe three times over 4 months
Sep 24, 2025 at 7:55 PM
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STRAILER
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It seems like the gas lift shocks are bad, this is a new car though so it is a strange problem, when you push the button for the trunk to open can you try helping the trunk lid up to see if that helps. This way we can tell if the problem is the latch or the lift shocks. Thanks for the video it helps.
Sep 25, 2025 at 10:11 AM
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ALYLAROSA485
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Rarely use my trunk, been like a month since I last popped it open and today I went shopping and went to pop the trunk and I heard it unlatch but didn’t lift so closed it and tested again and it worked just fine. I noticed an oil residue on the knob’s of the trunk latch as well. Would cold weather in the 30s-40s lately cause it to get stuck or Is this indicative of an actual electrical issue With the trunk?
Nov 13, 2025 at 11:13 AM (Merged)
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ALYLAROSA485
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This is the oil residue
Nov 13, 2025 at 11:13 AM (Merged)
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ALYLAROSA485
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Noticed that when closing trunk a low ringing sound is emitted. It persists for about 10 seconds after the latch is closed. Does it have to do with key fob? Because I keep a spare smart key fob in my purse in the trunk and only when that purse with the extra fob is in the trunk then the trunk emits that noise, otherwise it doesn’t do it.
Nov 13, 2025 at 11:13 AM (Merged)
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STRAILER
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It sounds like the trunk latch is weak, I would replace it and make sure the trunk lift shocks are in good shape.
Nov 13, 2025 at 11:16 AM
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ALYLAROSA485
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Is it common for a latch to be weak? Cars brand new and my grandma has the same car no issues
Nov 24, 2025 at 4:28 PM
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ALYLAROSA485
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Here's another video of what happens
Nov 24, 2025 at 4:34 PM
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STRAILER
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Thanks for the video, yes this will be a programming issue, it looks like the car will need to be updated at the dealer. I would take it back to them and show them what you showed me. They should reflash the BCM and CAN-bus system which will fix the problem. Please let me know how it goes.
Nov 25, 2025 at 9:19 AM
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ALYLAROSA485
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They think maybe the oil from the detailer on the rubber grommets is causing it to stick. Is this possible? They wiped down the trunk rubber and tested and seemed to work but issue is intermittent so wanted to have a full inspection anyway
Nov 28, 2025 at 6:16 AM
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STRAILER
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Yes, that is possible, they probably oiled it to help it open easier. You might need to have the car reprogrammed or updated at the dealer, but I would try a hard system reboot first, here is a video to help you see how:

https://www.youtube.com/watch?v=INiDRO5A5MY

Please let us know what happens.
Nov 29, 2025 at 12:03 PM
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ALYLAROSA485
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Update the Dealership couldn’t replicate the issue so they just cleaned the grommets and connectors and sent me on my way saying that it was likely just the oil from the detailer causing the trunk to stick with lack of use/ weather changes. They said they can’t identify an issue unless it can be replicated and of course it worked when they looked at it
Nov 29, 2025 at 4:11 PM
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STRAILER
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Yep, that makes sense, they need to see the problem or they cant fix it. So it the problem still there now that you have the car back?
Dec 1, 2025 at 9:18 AM
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ALYLAROSA485
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I haven't tested yet but is it possible they just needed to clean the grommets and connectors? They insisted it probably was just sticking from the oil applied at the detailer
Dec 1, 2025 at 9:58 AM
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STRAILER
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Okay let me know how things go.
Dec 2, 2025 at 9:02 AM
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ALYLAROSA485
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Hit button on key fob and trunk unlatches but doesn’t always lift open. It pops open but doesn’t lift. Already been to the dealership 3x and they can’t replicate issue because ii’s intermittent. They had taken harness apart And tested latch mechanism and circuits and then applied silicone oil and issue persisted. Any ideas? I uploaded the dealership info as well as a video of the issue. Hope this helps! Thanks a bunch
Dec 12, 2025 at 5:03 PM (Merged)
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STRAILER
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It sounds like the latch is the problem,(not opening fulling sometimes) I would swap it out which should fix the problem.
Dec 13, 2025 at 8:48 AM
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ALYLAROSA485
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They said they tested the latch and it was fine and they also took apart the harness. I sent you a picture previously of the dealer report
Dec 29, 2025 at 11:49 AM
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STRAILER
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There must be something wrong since you keep having issues, I would replace the latch anyway since nothing else works. Is the weather stripping sticky like the rubber is degrading?
Dec 30, 2025 at 9:25 AM
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ALYLAROSA485
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No but I noticed there were grease marks on the rubber border of the trunk where the grommets align. I already went to the dealer over 4x and they ran a bunch of tests and looked at the actuator, latch, etc and couldn’t replicate the issue and it’s intermittent which drives me crazy
Dec 30, 2025 at 12:00 PM
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STRAILER
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Yep, it sounds like there are missing something. I would try the latch because if it doesn't fully release sometimes it will cause this issue.
Dec 31, 2025 at 9:10 AM
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ALYLAROSA485
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I’m just sick of going and they say they can’t replicate the issue. They Claimed to test the latch and everything u can read the dealer info I previously submitted as well if you’d like. It’s honestly so frustrating when I went to two different dealers with undiagnosed issue. They told me previously at the first dealer that if it continued after they took the harness apart and tested the circuits and latch and basically the entire trunk assembly that they’d have to open a tech case with the manufacturer and have to keep my car at The dealer . It’s just been a headache
Jan 3, 2026 at 5:51 PM
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Yep, intermittent problem are tough to find to say the least especially when it does not malfunction at the time of service and you have no codes in the CAN BUS system.
Jan 4, 2026 at 9:03 AM