Improperly Welded Cross Braces Above Air Tanks – 2022-2024 Hyundai Translead CGN3-20/40 & CGNS-20/40 12-Pin Extended Chassis

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-685 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Hyundai Translead Submission Date : OCT 12, 2023 NHTSA Recall No. : 23V-685 Manufacturer Recall No. : NR Manufacturer Information : Manufacturer Name : Hyundai Translead Address : 8880 Rio San Diego Drive, #500 San Diego CA 92108-164 Company phone : 819-574-1500 Population : Number of potentially involved : 562 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2022-2024 20/40 12PIN EXTEN CHASSIS CGN3-20/40 & CGNS20/40 Vehicle Type : TRAILERS Body Style : OTHER Power Train : NR Descriptive Information : After attending a customer concern, we conducted a thorough investigation and discovered that other units were also affected by this condition. It was discovered that the three cross braces that sit just above the chassis air tanks could potentially have incomplete welding. To prevent an accident, our Engineering team created a retrofit which will address this condition. There were 21 productions potentially affected by this condition. Production Dates : AUG 31, 2021 – AUG 08, 2023 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : We discovered that the three cross braces that sit just above the chassis air tanks could potentially have incomplete welding. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : In the worst-case scenario, if the welds break it could cause the cross brace to fall off the unit and cause a road accident, or it could hit an air tank airline which in turn could potentially result in an unwanted brake lock / air issue. Description of the Cause : NR Identification of Any Warning that can Occur : NR Involved Components : Part 573 Safety Recall Report 23V-685 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : Diagonal Reinforcement Component Description : Diagonal Reinforcement 8x65x787 Component Part Number : X520-DD010-H03 Component Name 2 : Diagonal Reinforcement Component Description : Diagonal Reinforcement 6.4x158x1330 Component Part Number : X520-DD011-H05 Component Name 3 : Diagonal Reinforcement Component Description : Diagonal Reinforcement 6.4x158x1620 Component Part Number : X520-DD012-H01 Component Name 4 : Diagonal Reinforcement Component Description : Diagonal Reinforcement 6.4x158x1430 Component Part Number : X520-DD011-H06 Supplier Identification : Component Manufacturer Name : Hyundai Translead Address : 8880 Rio San Diego Dr Ste 600 San Diego California 92108 Country : United States Chronology : 10/02/2023. HT Sales receives customer concern in regards to chassis cross bars not being properly welded. 10/04/2023. HT QC inspects (3) units in Carson CA, found (1) of (3) units missing weld in cross bars. Starts internal investigation 10/06/2023. HT WTY concludes internal investigation and determines there are 21 productions that potentially omitted welding in this area. 10/09/2023. HT Engineering creates repair procedure to fix issue. Same day HT orders repair parts fabrication. Part 573 Safety Recall Report 23V-685 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 10/12/2023. HT WTY notifies customers of potential safety issue and recommends to put unit out of service until unit is inspected/repaired. 10/12/2023. HT WTY submits above information to NHTSA. Description of Remedy : Description of Remedy Program : Hyundai Translead is to reach out to customer via phone and email to ask these units be put out of service. Will coordinate with shops to have welds applied and bracket installed by welding on cross brace bracket to better support these junctions. Hyundai Translead will pay repair shop or customer if does in-house repair, paying via check NET 30 days after receiving the invoice. How Remedy Component Differs from Recalled Component : The existing welds that hold the cross braces are to be removed so we can apply new complete weld. After completing new welds, a reinforcement bracket will be welded to the cross brace plate to better support the area. No parts are being replaced, just weld re-work and new reinforcement bracket application. Identify How/When Recall Condition was Corrected in Production : It was first brought to our attention 10/02/2023, from 10/04 to 10/06 reviewed units in production line as well as in storage yard and determined some units were missing the weld. Retrofit procedure was placed 10/09 and units still at the factory are being retrofitted. Repair parts are being fabricated to fix this condition internally and externally. Recall Schedule : Description of Recall Schedule : Already sent customers e-mail notifying potential safety concern. Once NHTSA approved notification letter, will be sending formal email / correspondance with more information. Plan on notifying all customers by 10/13/2023. Planned Dealer Notification Date : OCT 13, 2023 – OCT 13, 2023 Planned Owner Notification Date : OCT 13, 2023 – OCT 13, 2023 * NR – Not Reported

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OCT.05.2023 Rev. A 20’/40’ Combo Chassis Modification Modification Manual A. GENERAL. The following modification procedure is to provide guidelines for chassis inspection and modification for combo 20’/40 chassis with missing welding’s over diagonal braces located on slider. B. MATERIAL REQUIRED. 1) X520-DD018-H01 REINFORCEMENT BRACKET As required PRIMER & PAINT 1) 10073084 PRIMER 65% ZINC SPECTRACRON #SEP79745 0.050 GL 2) 10073086 CURE AGENT FOR PRIMER PPG #GXM77957A 0.017 GL 3) 10087949 PPG BLACK URETHAN DELFLEET, HSI993519 0.048 GL 4) 10059329 CURE AGENT FOR PAINT PPG #GXH1080 0.012 GL C. TOOL REQUIRED. 1) Telescoping inspection mirror 2) Hand light 3) Spatula or scraper 4) Carbon Steel Wire Cup Brush 5) Arc Welding M/C 6) Welding wire AWS E71T-1 FLUX or WELDING ROD_Ø4.0 S7016. 7) Painting brush 8) Spray gun 9) Safety equipment (gloves, safety glasses, etc..) D. MODIFICATION. 1. Prior to repair, the chassis is required to be placed in a safe workplace & review the procedure. Place chassis on a flat leveled surface & apply parking brakes; Instructions described under this procedure must be performed by trained personnel & must take all necessary safety precautions 2. Every chassis combo 20’/40’ Spread 109” or TRI-Axle has to be inspected looking for missing welding between diagonal braces and X-member and/or gussets. 3. For the inspection use a telescoping inspection mirror and a hand light to verify missing welding application at each end of diagonal braces as show in following sketch indicated by arrows. 4. During inspection it’s important to verify the quantity of weld applied on each hole, less than 50% or missing will need, need to follow step 16,17 & 18. Missing welding 5. Locate the ABS valve and using a sharpie pen, mark the valve on top for ABS sensor location, do the same thing for each sensor as follow: 6. Disconnect ABS power cables too. 7. After welding inspection of all diagonal braces, sealant has to be removed on top of brace using a scraper or spatula. 8. For above operation, chassis need to be extended. 9. Using a carbon steel wire cup brush, remove the paint for welding application. Remove this sealant Bracings to repair ( rear portion) 10. Apply welding on top between gusset or X-member and diagonal brace as follow: 11. Using a chisel, remove weld spatters from weld, then use a carbon steel wire cup brush or a wire brush to clean better the welded area. 12. Repeat steps 6, 8, 9 & 10 for remaining areas, still with chassis w/ slider extended. 13. Keep the brakes on the axles and slide back the main frame just enough to have access to repair remaining diagonal braces located at front. 14. After all welding application is done, apply primer over all area welded to avoid corrosion top surface and under diagonal brace. 15. After primer is dry, apply paint over all areas repaired, on top and under diagonal brace. 16. For those diagonal braces that have a missing/partial (less than 50%) welding , it’s not necessary to apply welding underneath, bracket X520-DD018-H01 has to be installed (over the area already repaired) ONLY for those diagonals with missing/partial weld on bottom hole as shown on picture of step 3 & 4. 17. Locate the area or diagonal brace where welding was missing, then extend chassis or slide to have clear access to top area. Missing welding 18. Locate bracket X520-DD018-H01 over the diagonal brace with missing welding on bottom hole to have enough area to apply welding , then weld as below photo (reference only). 19. Repeat above for any missing weld in diagonal brace holes. 20. Using a chisel, remove weld spatters from weld, then use a carbon steel wire cup brush or a wire brush to clean the welded area. 21. Apply primer and paint as required 22. Following step 4, re-connect sensors and power cable.

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Hyundai Translead 8880 Rio San Diego Drive, Suite 600 San Diego CA 92108 800-251-0871 www.translead.com IMPORTANT SAFETY RECALL NHTSA ID # 23V-685 // HT Campaign # 801500 This notice applies to your Hyundai Translead Tri-Axle Chassis on BOM# 30021498 (3 units). VIN list attached. October 18th, 2023 Dear , We are conducting a safety recall and this notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act. Hyundai Translead has decided that a defect which relates to motor vehicle safety exists in certain 20’/40’ 12 Pin Tri-Axle chassis. Important! – Your Extendable Tri-Axle chassis falls within the recall population – You should avoid use and schedule an appointment with Hyundai Translead to have your unit retrofitted. Why is a technical service bulletin being conducted? We discovered that the (3) cross braces that sit just above your chassis air tanks could potentially have incomplete welding. In the worst-case scenario, if the welds break it could cause the cross brace to fall off of the unit and cause a road accident, or it could hit an air tank airline which in turn could result in an unwanted brake lock / air issue which could also cause an accident. What are we doing about the problem? To prevent this issue, we are asking to place the units out of service so we can apply a retrofit which consists in: 1. If original weld was in place but incomplete, we will complete the weld and add weld on top of the diagonal braces as well. 2. If original weld is missing or was applied to less than 50%, we will weld a bracket to the diagonal braces in addition to fixing the existing welds and adding the top weld. What should you do? Please contact Hyundai Translead at 855-482-2739, or e-mail [email protected] and reference Campaign # 801500 or NHTSA ID # 23V-685 at your earliest convenience to arrange an inspection, repair, or training, if required. What if I no longer own this trailer? Notify Hyundai Translead either by phone 855-482-2739, or e-mail [email protected] to inform us you no longer own this vehicle. Please be sure to include your 17 digit VIN number in all correspondence. Hyundai Translead 8880 Rio San Diego Drive, Suite 600 San Diego CA 92108 800-251-0871 www.translead.com Who should you contact if you have further questions or concerns? Please contact a Hyundai Translead representative at 855-482-2739 or [email protected] so we can address any question or concern. If after having attempted to take advantage of this safety recall and you believe you have not been able to have your units remedied without charge and within a reasonable amount of time, you may submit a complaint to the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Ave., S.E., Washington, D.C., 20590; or call the toll-free Vehicle Safety Hotline at 1-888-327-4236 (TTY: 1-800- 424-9153); or go to http://www.safercar.gov. Federal law requires that you forward a copy of this safety recall notice to the lessee within 10 days. We apologize for any inconvenience this safety recall may cause, however your safety is our primary concern. Sincerely, Hyundai Translead

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