2023-2025 Hyundai Tucson Inoperable Horn TSB 26-BE-003H

Owners of 2023-2025 Hyundai Tucson (NX4A) vehicles may experience an "inoperable horn" due to internal components oxidizing from foreign substances. Hyundai has issued Technical Service Bulletin (TSB) 26-BE-003H to address this issue, providing a detailed procedure for replacing both the low-pitch and high-pitch horn assemblies.

This TSB applies to Tucson (NX4A) models produced between July 26, 2022, and March 30, 2025, specifically those with VINs starting with 5NM.

Symptoms

The primary symptom addressed by TSB 26-BE-003H is an "inoperable horn." This means that when the horn button is pressed, there is no sound or an inconsistent sound from the vehicle's horn.

Diagnosis and Trigger Conditions

The root cause identified for the "inoperable horn" condition is the oxidation of internal horn components, likely due to exposure to foreign substances. To confirm this issue, a technician will need to verify the customer's concern and confirm the horn's inoperability.

Important Warnings for Owners

Hyundai emphasizes that this field action requires a confirmed customer concern and a verified instance of the related symptom before any repair work can proceed. Claims submitted without meeting these justification requirements may be subject to debit. This means that simply requesting a horn replacement without a demonstrable issue will not be covered under warranty.

Repair Procedure Summary

The repair outlined in TSB 26-BE-003H involves replacing both the low-pitch and high-pitch horn assemblies. The general steps are as follows:

1. Preparation: Turn off the ignition and disconnect the negative battery terminal. The battery terminal should be tightened to 6.5 lb-ft (78 lb-in or 8.8 N.m) during reassembly.
2. Bumper Removal: The front bumper assembly must be removed to access the horns. This requires referring to the shop manual for specific instructions on removing the front bumper. Technicians are advised to use plastic trim removal tools and partially remove the fender garnish by detaching the front four clips to prevent damage. The removed portion should be protected with painter's tape and a microfiber rag.
3. Digital Documentation: Before removing the original horns, a photo of the original horn must be taken using the STUI camera function and uploaded. If the STUI camera is not used, the last six digits of the VIN and the repair date must be written on a piece of paper and included in the photo.
4. Horn Removal: Disconnect the electrical connectors from both horns and remove their mounting bolts. The horn mounting bolts should be tightened to 7.25 lb-ft (87 lb-in or 9.8 N.m) when installing the new horns.
5. New Horn Installation: Install the new high-pitch and low-pitch horns in the reverse order of removal.
6. Reassembly and Test: Reinstall the front bumper and reconnect the 12V battery. Finally, test the horns to ensure proper operation.

Required Parts

To perform this repair, the following parts are required:

• Horn Assy - Low Pitch: Part Number 96641-CW500QQH (Quantity: 1)
• Horn Assy - High Pitch: Part Number 96651-CW500QQH (Quantity: 1)

The causal part identified for warranty claims is 96611-N9000.

Warranty Information

Repairs performed under TSB 26-BE-003H are covered under the 5-year/60,000-mile New Vehicle Limited Warranty (NVLW). Claims should be submitted as a "Campaign" type with operation code 50DA07R0 and an estimated operation time of 0.6 hours. The nature code is I14 and the cause code is ZZ3. It is crucial for dealers to ensure the parts and repair procedures fall within the warranty coverage period based on mileage and start date. If parts are out of warranty, a goodwill consideration request may be submitted. All incident parts are subject to callback through the Warranty Technical Center (WTC) return process, and claims may be debited if parts are not returned.

Owner Action

If you own a 2023-2025 Hyundai Tucson (NX4A) and are experiencing an "inoperable horn," you should contact your authorized Hyundai dealership. Explain the symptom to them, as a confirmed customer concern is required for the repair to be covered under warranty. The dealership will diagnose the issue and perform the necessary horn assembly replacement according to TSB 26-BE-003H.

NHTSA ID: 11028954