B1352 on 2021-2025 Kia K5 — Ignition Key-In Circuit Failure
1 vehicles · 1 makes · $10-$400 repair
How to diagnose and fix B1352: most-reported vehicles
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Kia K5 · 2021–2025
The electric trunk latch mechanism on the K5 is prone to sticking or failing to release, leaving the trunk locked. The issue is more common in cold weather when moisture gets into the latch mechanism and freezes. The trunk release button on the key fob, interior button, and exterior trunk handle may all fail to open the trunk when the latch is stuck. Some owners report the latch actuator motor failing entirely, requiring manual release from inside the trunk via the emergency release handle.
Common Symptoms
- Trunk will not open from key fob button
- Interior trunk release button unresponsive
- Trunk latch clicks but does not release
- Trunk opens intermittently or requires multiple presses
- Trunk stuck closed in cold weather
How to Fix
Lubricate the trunk latch mechanism with white lithium grease or silicone spray every 6 months to prevent sticking ($5-$10). If the latch actuator motor has failed, replace the entire trunk latch assembly ($100-$200 for parts, $100-$200 labor). In an emergency, access the trunk from the rear seat pass-through or use the emergency release handle inside the trunk. The dealer can reprogram the trunk open/close module if the issue is software-related. Apply dielectric grease to the latch electrical connector to prevent corrosion.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Kia 81230-L0000 trunk-lid latch assemblyOEMKia 81230-L0000
Replace a mechanically or electrically failed trunk latch after command and alignment diagnosis Fitment/availability: 2021-2024 Kia K5 trunk lid; confirm VIN/current EPC before purchase.
- Genuine Kia 81230-L8000 trunk-lid latch assemblyOEMKia 81230-L8000
Replace a mechanically or electrically failed trunk latch on the facelift branch Fitment/availability: 2025 Kia K5 trunk lid; confirm VIN/current EPC before purchase.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Owner tips & cautions
- TipSpray the trunk latch with silicone lubricant before winter. This prevents moisture from freezing the mechanism shut in cold weather. Takes 30 seconds and saves a lot of frustration.
Sources for this issue (1)
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B1352 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does B1352 mean?
B1352 stands for "Ignition Key-In Circuit Failure." B1352 indicates a failure in the 'key-in ignition' circuit, which is how the body control module (or instrument cluster) detects whether the key is physically present in the ignition lock cylinder. This circuit drives the key-in/headlamp-on warning chime and related reminders. A fault means that detection is unreliable, which can cause chime issues and, on some Ford/Jaguar applications, contribute to no-crank or theft-system concerns. It generally won't leave you stranded but can drain the battery if the chime or related logic misbehaves.
What are the most common causes of B1352?
The most common causes of B1352 are: Faulty key-in ignition switch/cylinder sensor, Corroded or damaged wiring near the ignition switch, Faulty door chime or warning module, Loose or corroded connector at the ignition switch, Faulty body control module (or GEM), Open or short in the key-in signal circuit. The specific cause varies by vehicle.
How much does it cost to fix B1352?
Repair costs for B1352 range from $10 to $400, depending on the vehicle and root cause.
Which vehicles are affected by B1352?
Au7o has documented B1352 across 1 vehicle models from 1 manufacturers: Kia.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.