2025 Hyundai Elantra Cooling Fan Vibration TSB

Symptoms

Owners of certain 2025 Hyundai Elantra (CN7) vehicles equipped with the 2.0L AKS NU PE engine may notice a distinct vibration in the steering wheel. This Hyundai Elantra cooling fan vibration typically occurs when the engine's cooling fan is operating at high speed. The vibration can be a nuisance and may indicate an underlying issue with the cooling fan assembly.

Diagnosis / trigger conditions

To diagnose the Hyundai Elantra cooling fan vibration, technicians will use a diagnostic tool connected to the Data Link Connector. The diagnostic process involves turning the ignition ON and performing an "Actuation Test." Specifically, they will select "ENGINE" and then activate the "Fan Motor Control-High Speed" function. While the cooling fan is running at high speed, the technician will place a hand on the steering wheel to check for any vibration.

If no vibration is detected during this test, the Technical Service Bulletin (TSB) 25-EE-001H does not apply, and further diagnosis for other potential issues would be necessary. However, if vibration is felt, it confirms the presence of the issue, and the cooling fan assembly replacement procedure should be initiated.

Repair procedure summary

The repair involves inspecting and, if necessary, replacing the engine cooling fan assembly. The general steps include:

1. Preparation: Disconnect the negative battery terminal and the coolant overflow hose. Remove the filler neck assembly, air cleaner assembly, and intake shield to gain access to the cooling fan.
2. Fan Removal: Disconnect the cooling fan controller connector. Secure the coolant filler neck away from the fan using a bungee cord. Carefully remove the cooling fan assembly from the radiator.
3. Coolant Drainage: Drain the coolant from the overflow tank attached to the old cooling fan assembly.
4. Documentation: Take a photograph of the old cooling fan assembly, including the last 6 digits of the vehicle's VIN and the date of inspection, and upload it to the STUI system for warranty purposes.
5. New Fan Installation: Transfer the overflow hose from the old cooling fan assembly to the new one. Install the new cooling fan assembly and reassemble all previously removed components in reverse order.
6. Coolant Replenishment: Replenish the coolant overflow tank with approximately 10 fluid ounces of Pink Coolant and 10 fluid ounces of diluted/filtered water, filling it to the 'F' line.
7. Verification: Verify the proper operation of the newly installed engine cooling fan assembly.

Required tools or parts

To address the Hyundai Elantra cooling fan vibration, the following parts and equipment are required:

• Cooling Fan Assembly: Part Number 25380-AA200
• Pink Coolant: Part Number 00232-19098 (One gallon can treat up to 12 vehicles; approximately 10 oz. is needed per vehicle)
• Bungee Cord: Or an equivalent tool for securing components during the repair.

Important warnings

Owners and technicians should be aware of the following critical information:

• Radiator Hoses: Technicians are advised NOT to disconnect the upper engine coolant radiator hoses during the repair process.
• Part Return: Incident parts are subject to callback through the Warranty Technical Center (WTC) parts return process. A warranty claim is subject to debit if the part is not returned.
• Radiator Damage: The cooling fan assembly must be removed carefully from the vehicle. Damage may occur to the radiator assembly if excessive force is used.
• Torque Specifications: Applying the recommended torque to all fasteners is essential to reduce potential issues from occurring after the service procedure.

Owner action

If you own a 2025 Hyundai Elantra (CN7) with the 2.0L AKS NU PE engine and experience Hyundai Elantra cooling fan vibration in the steering wheel when the cooling fan runs at high speed, you should contact your authorized Hyundai dealer to schedule an inspection. This issue is covered under warranty, and the service procedure (Op. Code 25380F00) has an estimated operation time of 0.6 hours. Ensure your dealer is aware of TSB 25-EE-001H for proper diagnosis and repair.

Source: NHTSA TSB ID 11016113