2024 Hyundai Elantra Coolant Leak from ITM Module TSB 25-EM-003H
Hyundai has issued Technical Service Bulletin (TSB) 25-EM-003H for certain 2024 Hyundai Elantra vehicles experiencing a coolant leak from the Integrated Thermal Management (ITM) Module's Heat Exchange Port. This TSB outlines the procedure for replacing the affected component.
Certain 2024 Hyundai Elantra vehicles equipped with a 2.0L engine may develop a Hyundai Elantra coolant leak from the Heat Exchange Port located on the Integrated Thermal Management (ITM) Module assembly. This issue is addressed by Hyundai Technical Service Bulletin (TSB) 25-EM-003H, which supersedes a previous bulletin (24-EM-011H) to expand the affected production date range and update warranty information.
Symptoms
Owners of affected vehicles may notice a Hyundai Elantra coolant leak originating from the Heat Exchange Port of the Integrated Thermal Management (ITM) Module assembly. This could lead to visible coolant puddles under the vehicle or a drop in coolant levels.
Repair Procedure Summary
The repair involves replacing the Heat Exchange Port at the ITM assembly. The procedure includes several steps:
- ITM Module Removal: The Integrated Thermal Management (ITM) Module is carefully removed from the vehicle. Technicians are instructed to use a supplied funnel and coolant recovery container to drain and reuse the coolant, preventing contamination.
- Heat Exchange Port Replacement: The insulation cap is installed on the ITM actuator connector. Fixing screw bolts are loosened and removed from the heat exchange port. The port is then detached from its housing. The tightening torque for these bolts is 4.4 lb-ft (53 lb-in or 5.9 N.m).
- Component Disassembly: The Teflon gasket, support, and wave spring are removed in a specific order. The Teflon gasket and Heat Exchange Port (including its O-ring) are replaced, while the support and wave spring are reused. It is crucial to ensure the marking on the new Teflon gasket faces downward during reinstallation.
- Reassembly: When installing the O-ring onto the ITM housing, it must be coated entirely with coolant. The new and old Heat Exchange Ports are photographed side-by-side with the last 6 digits of the VIN and the repair date for
Gallery
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Frequently Asked Questions
- What is TSB 25-EM-003H for the Hyundai Elantra?
- TSB 25-EM-003H is a Hyundai Technical Service Bulletin addressing a coolant leak from the Heat Exchange Port on the Integrated Thermal Management (ITM) Module assembly in certain 2024 Hyundai Elantra vehicles. It provides a detailed repair procedure for technicians.
- What are the symptoms of the Hyundai Elantra coolant leak described in this TSB?
- The primary symptom is a coolant leak from the Heat Exchange Port of the Integrated Thermal Management (ITM) Module. Owners might notice coolant puddles or a decrease in their vehicle's coolant level.
- Which 2024 Hyundai Elantra vehicles are affected by this coolant leak issue?
- This TSB applies to 2024 Hyundai Elantra (CN7) vehicles equipped with a 2.0L engine, produced between August 7, 2023, and April 17, 2024. VINs for these vehicles will begin with 'KMH'.
- What parts are needed to fix the Hyundai Elantra coolant leak?
- The repair requires an ITM Service Kit (part number 25690-2J299QQH), which includes a Heat Exchange Port Assembly (25695-2J299), Teflon Gasket (25696-2J299), ITM Housing Gasket (25623-2J200), Funnel (25697-2J299), Coolant Recovery Container (25698-2J299), and Insulation Cap (25699-2J299). Pink Coolant (00232-19098) is also used.
- Is there a specific torque requirement for the fasteners during the repair?
- Yes, applying the recommended torque is essential. The fixing screw bolts for the heat exchange port require 4.4 lb-ft (53 lb-in or 5.9 N.m), and the ITM reinstallation bolts require 5.1 lb-ft (61 lb-in or 6.9 N.m).
What Hyundai Elantra owners report
Counted from the records in our database across 35 model years.
- 8,883
- Owner complaints
- 62
- Recalls
- 684
- Service bulletins
- 895
- Crashes reported
- 196
- Fires reported
- 735
- Injuries reported
The 2024 model year
62 complaints, the 30th most of 35 model years on file. Owners reported 5 crashes, 1 fire and 2 injuries for this year, which also has 2 recalls on file.
Engine, the system this article covers, accounts for 1,680 of 8,883 complaints (19%), including 10 for 2024.
Complaints by model year
| 2001 | 315 | |
|---|---|---|
| 2002 | 342 | |
| 2008 | 315 | |
| 2010 | 380 | |
| 2011 | 433 | |
| 2012 | 654 | |
| 2013 | 1,324 | |
| 2014 | 388 | |
| 2017 | 770 | |
| 2024 | 62 |
Most-reported systems
- Engine — 1,680
- Air Bags — 1,337
- Steering — 1,152
- Electrical System — 1,110
- Service Brakes — 1,073
Latest recalls for the 2024 model year
- 26V308000 — Electrical System (May 2026)
- 24V308000 — Engine And Engine Cooling (May 2024)
Recent owner reports about engine
The contact owns a 2024 Hyundai Elantra. The contact stated that while driving, check engine light illuminated, with a loss of power when accelerating.
Read owner complaints →My oil plug fell out causing engine damage. They are saying it is fault of wal mart who did last oil change but 2 months and 12,000 miles have passed since oil change and they will not cover under warranty
Complaints are owner reports filed with NHTSA. They are unverified, and counts depend on how many vehicles were sold, so they are not a failure rate.
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