2025-2026 Hyundai Ioniq 5/Ioniq 9 Front Motor Noise TSB

Hyundai has released Technical Service Bulletin (TSB) 26-01-029H, also identified as Limited Coverage Campaign LA9, to address a specific noise issue affecting certain 2025 Hyundai Ioniq 5 (NEA EV) and 2026 Hyundai Ioniq 9 (ME1A EV) vehicles. Owners may notice a high-frequency noise from the front motor area during low-speed deceleration.

This bulletin provides detailed instructions for Hyundai certified technicians to replace the front motor and reduction gear assembly, aiming to resolve the 2025 Hyundai Ioniq 5 front motor noise and similar issues in the Ioniq 9.

Important Warnings for Owners

Hyundai emphasizes several critical points regarding this service action:

• Dealer Action: Dealers are required to perform this field action on all affected vehicles within the 10-year/100,000-mile High Voltage Warranty period for original owners. This warranty is transferable to subsequent owners. The repair must be completed prior to customer retail delivery or whenever an affected vehicle is in the shop for any maintenance or repair.
• Certified Dealers Only: To prevent potential damage to IONIQ vehicles, repairs related to this TSB can only be performed by IONIQ certified dealers.
• Warranty Coverage: The parts and repair procedures outlined in TSB 26-01-029H are covered under the applicable High Voltage Warranty. Owners should ensure their vehicle is within the warranty period by checking the mileage and Warranty Start Date.

Symptoms

Owners of affected 2025 Hyundai Ioniq 5 and 2026 Hyundai Ioniq 9 vehicles may experience a specific symptom: a "high-frequency noise from the front motor area during low-speed deceleration." This 2025 Hyundai Ioniq 5 front motor noise is the primary indicator that your vehicle may require this service.

Repair Procedure Summary

The repair outlined in Hyundai TSB 26-01-029H involves replacing the front motor and reduction gear assembly. The general steps for technicians include:

1. Assembly Replacement: The front motor and reduction gear assembly (part A in the service manual diagrams) is replaced. This requires following specific removal and installation procedures detailed in the shop manual under "Motor and Reduction Gear System."
2. Digital Documentation: Technicians must use the STUI camera function to take a clear photo of the newly installed Front Motor & Reduction Gear Assembly, ensuring the serial number is visible. This photo is then uploaded to STUI. If the STUI camera is unavailable, the last 6 digits of the VIN and the repair date must be written on a piece of paper and included in the photo.
3. Reinstallation: All remaining parts are reinstalled in the reverse order of their removal.
4. Fluid and Calibration: Coolant is refilled, and air bleeding is performed. An "Automatic Resolver Offset Calibration" must be completed as detailed in the shop manual.
5. Wheel Alignment: A wheel alignment is performed, following the procedures in the shop manual under "Suspension System > Tires/Wheels > Alignment > Inspection."
6. Verification: The technician verifies normal vehicle operation and confirms that the "high-frequency noise from the front motor area during low-speed deceleration" is no longer present.
7. Completion: The service procedure is then considered complete.

Required Tools or Parts

To address the 2025 Hyundai Ioniq 5 front motor noise, the following parts are required:

• Motor-Gear Drive Unit Assy, FRT: Part Number 44000-18FA1 (Quantity: 1)
• Clip: Part Number 49557-F2000 (Quantity: 2)
• Nut-Castle: Part Number 49551-4T000 (Quantity: 2)
• Pink Antifreeze/Coolant: Part Number 00232-19098 (Quantity: 2 gallons)

Owner Action

If you own a 2025 Hyundai Ioniq 5 or 2026 Hyundai Ioniq 9 and notice a high-frequency noise from the front motor area during low-speed deceleration, you should contact an IONIQ certified Hyundai dealer. This repair, identified by TSB 26-01-029H and Campaign LA9, is covered under the High Voltage Warranty, provided your vehicle meets the eligibility criteria.

---

Source: NHTSA ID: 11030326