If your 2024–2025 Kia Sorento makes a dull clunk from the back over every little bump, you may have discovered Kia Sorento TSB CHA127V the hard way. After waves of complaints, Kia quietly issued this bulletin to address a defective rear shock design that can cause annoying suspension noise on rough or bumpy roads.

For many owners, CHA127V is the missing link between “we can't find anything wrong” and finally getting a real fix.

What Is TSB CHA127V?

A Technical Service Bulletin (TSB) is Kia's internal repair playbook. CHA127V tells dealers that certain 2024–2025 Sorento (MQ4a) vehicles can develop a clunking noise from the rear suspension because the gas pressure inside the rear shock absorber drops. When that happens, the shock develops play and you hear a soft thud every time the suspension moves.

The bulletin instructs dealers to replace both rear shock absorbers with updated parts and follow specific installation steps. It's done under warranty if your vehicle and complaint qualify.

Does Your Sorento Qualify?

Coverage depends on your VIN and build date, not just the model year. CHA127V applies to a defined production window of 2024–2025 Sorentos; your dealer can check this instantly in Kia's system.

To find out:

• Call your dealer and ask them to check for TSB CHA127V on your VIN.
• Mention that you're hearing a right-rear or rear suspension clunk over small bumps.
• If you're in Canada, ask whether the bulletin has been adopted there yet—some owners reported delays.

Even if your Sorento falls just outside the bulletin, similar symptoms should still be investigated under warranty.

What to Expect at the Dealer

Most dealers won't install new shocks unless they can duplicate the noise. That means:

• Ask to ride along with the technician on a rougher side street.
• Point out the exact sound and where it's coming from.
• Make sure the repair order clearly references rear suspension noise / clunk and any mention of CHA127V.
• Keep copies of every visit and note days when the SUV is in the shop.

If parts are on backorder, your Sorento may sit for days or weeks – important for potential lemon law calculations.

Your Rights in New York and New Jersey

TSBs are different from recalls: Kia doesn't mail you a notice, and the fix only happens if you complain and the dealer agrees there's a problem. But repeated rear suspension repairs, or long stretches without your Sorento, can still be a legal issue, not just an annoyance.

Owners with substantial and recurring problems may be entitled to a refund or replacement under the lemon law. Other owners may have claims for breach of warranty under the Magnuson-Moss Act.

If you're in NY or NJ and your Sorento keeps clunking even after a CHA127V repair (or your vehicle has been in the shop multiple times) – contact us for a free consultation. The Law Office of Howard Gutman can review your repair history, explain your rights, and help you explore your options.

Sources:

• NHTSA – 2025 Kia Sorento Complaints & Communications
• Center for Auto Safety – 2025 Kia Sorento Defects & Recalls
• Kia Forums – Rear Suspension Noise in New 2025 Sorento (TSB Discussion)
• Facebook - 2024 + Kia Sorento 4owners & Accessories

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