2025 Buick Enclave Brake Problems? Master Cylinder Failure

Class Action Investigation

Updated on September 3rd, 2025 Author: Sergei Lemberg

Lemberg Law is reviewing reports of brake system failures in the 2025 Buick Enclave. Drivers say their brake pedals suddenly sink to the floor, warning messages such as “brake system failure” appear, or the vehicle loses stopping power altogether. Early evidence points to a defect in the brake master cylinder, a critical component of the braking system. This same issue has also been reported in the GMC Acadia and Chevy Traverse.

What’s Going On with the 2025 Enclave Brakes?

Owners have described frightening symptoms:

• Brake pedal drops when pressed—sometimes before starting the vehicle.
• Sudden loss of braking power while driving, even at high speeds.
• Dashboard warning reading “brake system failure.”
• Dealer diagnosis is often inconclusive; some blame sensors or report part shortages.

Real Complaints from Enclave Owners

Owners have shared the following experiences:

“Just bought a 2025 Enclave, 10 months ago… driving at 65 mph… my brakes went out, and the dash said ‘brake system failure.’”

“Purchased a 2025 Enclave Avenir with only 3 miles on it. Within a week, the brake pedal went to the floor before starting. Dealer couldn’t replicate it after keeping it a week. It’s happened multiple times.”

“Brakes failed before leaving the dealership. They said it was a sensor.”

What Is GM Saying? TSB N242482170 Explained

In December 2024, General Motors issued Service Update N242482170 for certain 2024 and 2025 vehicles, including the Buick Enclave. The bulletin revealed a defect in the brake master cylinder: a missing internal cartridge seal inside the e-Boost module.

• The risk: Without the seal, hydraulic pressure may fail, leading to inconsistent or total brake loss.
• The fix: Replace the brake master cylinder with a corrected unit.

Brake Problems in Your 2025 Buick Enclave? Contact Lemberg Law.

If your 2025 Buick Enclave has experienced brake failure, you’re not alone. Lemberg Law is actively investigating claims involving defective master cylinders and unsafe braking systems.

Call our Helpline or fill out our contact form today.
Free case evaluation. No fees unless we win.

Sources:

1. N242482170 Brake Master Cylinder TSB
2. National Highway Traffic Safety Administration Complaint Database

About the Author:

Sergei Lemberg is an attorney focusing on consumer law, class actions related to automotive issues, and personal injury litigation. With nearly two decades of experience, his areas of practice include Lemon Law (vehicle defects), Debt Collection Harassment, TCPA (illegal robocalls and texts), Fair Credit Reporting Act, Overtime claims, Personal Injury cases, and Class Actions. He has consistently been recognized as the nation's "most active consumer attorney." In 2020, Mr. Lemberg represented Noah Duguid before the United States Supreme Court in the landmark case Duguid v. Facebook. He is also the author of "Defanging Debt Collectors," a guide that empowers consumers to fight back against debt collectors and prevail, as well as "Lemon Law 101: The Laws That Lemon Dealers Don't Want You to Know."

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