2021-2024 Kia Sorento and Sportage Front Brake Judder TSB

Kia has issued Technical Service Bulletin (TSB) 126V (Revision 1, dated October 2024) to address customer complaints of front brake judder in certain 2021-2024 Kia Sorento (MQ4a) and 2023-2024 Kia Sportage (NQ5a) vehicles. This bulletin provides the procedure for replacing the front brake discs to resolve the issue. This bulletin has been revised to include additional information, with new or revised sections indicated by a black bar in the margin.

Symptoms

Owners of affected vehicles may notice a distinct "vibrating and/or pulsing sensation (front brake disc judder)" when applying the brakes during driving. This sensation can be felt through the steering wheel, the brake pedal, and even the seat. If you experience this symptom, your vehicle may be eligible for the repair outlined in TSB 126V to correct the Kia Sportage front brake judder or Kia Sorento front brake judder.

Important Warnings for Owners

Kia has provided several important notices regarding this service bulletin:

• "A Technical Service Bulletin is a field fix repair program without customer notification that may be performed during the warranty period."
• "This bulletin should only be performed with valid customer complaint of front brake judder."
• "Once the repair is performed and the brake rotors are replaced, TSB CHA126V is complete. Any subsequent or follow-up concerns must be addressed according to normal Service/Warranty Guidelines."
• "As per the Warranty and Consumer Information manual, Brake linings, including pads and shoes, and clutch linings are warranted for 12 months/12,000 miles, whichever comes first, if they fail to function properly during normal use."

Diagnosis / Trigger Conditions

This TSB specifically addresses a customer's complaint of front brake judder. For the repair to be performed, the "customer complaint of brake judder must be stated in the opening RO and Claim Notes" by the dealership. Technicians will inspect the vehicle to confirm the presence of brake judder before proceeding with the repair.

Repair Procedure Summary

The repair involves replacing both front brake discs on the affected vehicle. Technicians are instructed to refer to the detailed repair procedures found in the applicable Shop Manual on KGIS under "Brake System → Brake System → Front Brake Disc → Repair procedures." An important note highlights that flange bolts are not reusable and new parts must be installed. Torque specifications for these new parts are also outlined in the shop manual.

Required Tools and Parts

To perform this repair, a special service tool (SST) and specific replacement parts are required:

• Required Tool:
  • Piston Expander: Part Number 09581 11000
• Required Parts:
  • For Sorento (MQ4a) models:
    • Front Brake Disc: Part Number 51712 R5000 (Quantity: 2)
    • Bolt-Flange: Part Number 51735 B1100 (Quantity: 4, two for each side)
  • For Sportage (NQ5a) models:
    • Front Brake Disc: Part Number 51712 L0100 (Quantity: 2)
    • Bolt-Flange: Part Number 51735 3M100 (Quantity: 4, two for each side)

Warranty Information

This repair is covered under warranty with specific codes and labor operations. The warranty information is as follows:

• N Code: N99
• C Code: C99
• Repair Description: "Brake Judder inspection (NG) + Front Disc Replacement"

For Sorento (MQ4a) models, the Labor Operation Code is 240A34RO with an estimated operation time of 0.7 hours. For Sportage (NQ5a) models, the Labor Operation Code is 240A34R1, also with an estimated 0.7 hours. These details help dealerships process the claim correctly. Owners should note that the repair is considered complete once the brake rotors are replaced, and any subsequent concerns should be addressed according to normal service guidelines. For information on substitute transportation, refer to the Service Policy and Procedures Manual (SPPM) 6.11 “Kia Substitute Transportation.”

NHTSA ID: 10255850