Buick recalls Regal vehicles over loss of brake assist

Warren, MI – July 17, 2022 – General Motors (NYSE:GM), which owns the Buick brand, has issued a recall for 23,734 Regal sedans because of a potential loss of brake assist.

The recall covers the 2018–2020 Buick Regal mid-size cars.  

Recall summary

The brake assist function helps in stopping the car faster during emergency braking. This is achieved through a pump that boosts the brakes’ stopping power by removing all the air inside the booster, creating a vacuum. The pump is regulated by the electronic brake control module, or EBCM.  

In the affected vehicles, a software error may lead to the EBCM failing to engage the brake booster function.

If there is no assist, the vehicle may take a longer distance to stop, depending on the force exerted by the driver on the brake pedal.

The component involved in this recall is the electronic brake control module software, with multiple part numbers including 39135331, 39187211, 39187212 and 39215669.    

Recall risks

Read more about the risks of this defect in our recent article about a similar brake recall issued by Toyota. 

Warning signs 

When the vacuum-brake assist has failed to engage, a message will appear on the dashboard. This will be accompanied by a malfunction warning light, and drivers may observe that the brake pedal becomes harder to press.  

Other Buick recalls 

As part of recent Buick Regal recalls, the 2010-2013 model years were among those included in a recall issued in January over suspension issues. The rear suspension toe links used in the affected vehicles could break due to the supplier’s excessive use of protective coating, which could fail to shield the part against corrosion. This could lead to the toe links wearing down and breaking, causing the rear wheels to wobble. 

The repair

Dealers will reflash the EBCM software used in the affected vehicles. There will be no charge for this service. General Motors will reimburse owners who paid to have the problem fixed prior to the recall order.   

Affected owners will be notified by August 15, 2022. 

Is your vehicle part of this recall?

More than 23,000 vehicles are included in this Buick Regal brake recall. To see if your vehicle is affected, run a Buick recall check using MotorSafety’s free vehicle lookup tool.  

Joseph EstabilloBuick recalls Regal vehicles over loss of brake assist

General Motors recalls vehicles for contaminated brake booster

Pleasanton, CA – Sept 24, 2020 – General Motors (GM) (NYSE: GM) has recalled 6 different vehicle models which may have a contaminated component in the braking system. This contamination could disrupt sensor communications to the brake booster, making it harder to stop the vehicle and increasing the risk of a crash. The recall includes:

  • 2020-2021 Buick Encore GX subcompact SUVs
  • 2020 Cadillac CT4 and CT5 luxury sedans
  • 2020 Cadillac XT4 compact SUVs
  • 2020 Chevrolet Corvettes
  • 2021 Chevrolet Trailblazer crossovers

Recall summary  

The recall concerns the brake-by-wire system, which uses an electronic brake booster to help stop the car quickly without depending on how hard the driver presses the brake pedal. 

In June, GM launched an investigation after receiving multiple complaints about the strength of the brakes. They discovered that, due to a factory cleaning issue, the connector between the rotor position sensor and the electronic brake control module had been contaminated.

This contamination can disrupt communication between the two parts and disable the electronic brake booster.

Safety tips

Drivers with a failing brake booster may notice that their brakes are difficult to press. They may also notice an increase in the car’s stopping distance. 

Own one of these affected vehicles? It may be wise to keep an eye on the instrument panel, which will display a warning message if the brake booster fails. If this happens, keep the increased stopping distance in mind as you drive.

The repair

Dealers will replace the vehicles electronic brake control module for free. However, this repair is not yet available, as GM is still working on sourcing enough replacement brake boost modules. The company will notify owners when the repair becomes available.

Is your vehicle part of this recall?

Over 3,000 vehicles are part of this GM recall. To see if your car is one of them, use MotorSafety’s free vehicle lookup tool.

Rebecca RandGeneral Motors recalls vehicles for contaminated brake booster