Service Brakes owner reports
Based on 3 owner reports that included mileage.
| Problem | Severity | Lower mileage | Middle mileage | Higher mileage | Relation to your mileage |
|---|---|---|---|---|---|
| Service Brakes owner reports | High severity | 71,274 mi | 85,547 mi | 101,774 mi | Reported mileage range is unknown |
Check this specific car
- 1Ask the inspector to test the named system and note any warning lights, noises, leaks, or stored codes.
Sources and limits
Source recordEvidence: Medium confidence
The records describe a possible crash, fire, injury, or loss of control.
“The contact owns a 2020 Chevrolet Malibu. The contact stated that while driving approximately 45 MPH and approaching a stop light the braking system malfunctioned when pressing the brake pedal causing the vehicle to crash into the rear of a second vehicle. The contact indicated that the vehicle did not reduce speed when pressing the brake pedal and the collision avoidance feature did not activate. A police report was taken at the scene. The police officer also confirmed no skid marks at the crash site. During the crash, the contact sustained injuries to the left arm and right shoulder that did not require medical attention. Both the driver and front seat passenger of the second vehicle sustained undisclosed injuries and were transported to the hospital. The vehicle was towed away and later deemed destroyed by the insurance company. The cause of the failure has not yet been determined. The manufacturer was notified of the incident. The local dealer was not contacted. The failure mileage was 57,000.”
Source recordEvidence: Medium confidence
The records describe a possible crash, fire, injury, or loss of control.
“While driving, the brakes became hard and the vehicle was difficult to stop. The brake pedal required excessive force, brake assist was reduced, and the stopping distance increased, creating a serious safety hazard. The check engine light had been illuminated for approximately two years before the brake failure occurred. In January 2024, I reported brake-related concerns to a Chevrolet dealership while the vehicle was under warranty, but the root cause was not diagnosed. In November 2025, after the brake pedal became hard, an independent repair facility inspected the vehicle and determined the brake problem was caused by a failing engine vacuum pump. They advised that the vehicle be repaired by a Chevrolet dealership. By January 2026, the brake condition had worsened to the point that the vehicle was no longer safe to drive and had to be towed. A Chevrolet dealership later confirmed that the engine vacuum pump had seized and damaged the camshaft, requiring replacement of both components. The vehicle remains inoperable. The failed vacuum pump caused loss of brake assist, resulting in a hard brake pedal, reduced braking ability, and an increased risk of a crash. I believe this represents a serious safety defect because failure of the vacuum pump significantly impairs the driver’s ability to stop the vehicle safely. I understand GM has issued service information regarding vacuum pump failures on this engine, and I am submitting this complaint because I believe other drivers may experience the same dangerous brake failure.”
Source recordEvidence: Medium confidence
The records describe a possible crash, fire, injury, or loss of control.
“To Whom It May Concern, I am writing to formally report a critical safety defect regarding my 2020 Chevrolet Malibu. This defect resulted in a life-threatening incident while I was driving on the highway, during which my vehicle failed to stop as required. While operating at highway speeds, the brake pedal became extremely hard to depress, making it nearly impossible to decelerate or bring the vehicle to a complete stop. This sudden loss of power assist forced me to manage an incredibly dangerous situation in high-speed traffic. Based on the symptoms, I am concerned that the brake booster vacuum pump has suffered an internal failure, a documented issue for this model year where oil sludge or debris causes the pump to seize. In addition to the physical resistance of the pedal, I am concerned about the reliability of the Electronic Brake Control Module (EBCM). The failure experienced on the highway demonstrates that this vehicle is unsafe for public roads, as the force required to engage the brakes in an emergency is far beyond safe operating standards. I request that the NHTSA investigate this brake failure and determine if a mandatory recall is necessary to prevent similar incidents from resulting in catastrophic collisions. Please contact me if you require further information Thank you [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)”
Source recordEvidence: Medium confidence
The records describe a possible crash, fire, injury, or loss of control.
“I am writing to report a serious and dangerous issue that occurred with my 2020 Chevrolet Malibu LT on April 27th 2026. While driving on the interstate after work, my vehicle suddenly experienced a failure that made it extremely unsafe to operate. The brake pedal became extremely hard to press, and the vehicle did not want to slow down or stop properly. This created a very dangerous situation while I was driving at highway speeds. Additionally, I noticed that nearly all of the engine oil was gone, which is extremely concerning and may be related to the failure. Based on these symptoms, it appears the vacuum pump may have failed while the vehicle was in motion. This issue placed me at significant risk of an accident and could have resulted in serious injury. I am requesting an immediate investigation into this matter and assistance with repairs. I would also like to know if there are any recalls, known defects, or extended warranties related to this issue. Please advise on the next steps as soon as possible, as the vehicle is currently unsafe to drive.”
Source recordEvidence: Medium confidence
The records describe a possible crash, fire, injury, or loss of control.
“While driving the brake pedal became hard to push out of no where. Once the car got to the shop it stopped cranking. The shop is stating that the brake vacuum pump is the cause of the brake pedal messing up, and that it also caused other engine damages estimating $3000.00”
Source recordEvidence: Medium confidence
The records describe a possible crash, fire, injury, or loss of control.
“The contact owns a 2020 Chevrolet Malibu. The contact stated that while driving approximately 60 MPH on the freeway and depressing the brake pedal to slow down, the brake pedal was difficult to depress, and the vehicle failed to immediately stop. During the failure, the check engine and traction control warning lights were illuminated. The vehicle was slowly driven to the residence and parked. The cause of the failure was not yet determined. The local dealer was notified of the failure. The manufacturer was not yet contacted. The failure mileage was 85,547.”
Source recordEvidence: Medium confidence
The records describe a possible crash, fire, injury, or loss of control.
“The contact owned a 2020 Chevrolet Malibu. The contact stated that while driving approximately 65 MPH, the brake pedal became inoperable. There was a warning light illuminated. The contact stated that the brake pedal failed to function properly while attempting to stop the vehicle. Additionally, while the vehicle was parked and turned off, the contact became aware that brake fluid was leaking onto the engine. A mobile independent mechanic inspected the vehicle and determined that the brake vacuum pump had failed and needed to be replaced. The vehicle was not repaired. The dealer was not contacted. The manufacturer was not made aware of the failure. The failure mileage was approximately 118,000.”
Source recordEvidence: Medium confidence
The records describe a possible crash, fire, injury, or loss of control.
“I was unaware that when I purchased this vehicle that when the oil is low, the breaks go out and the break power booster shatters. The beaks have gone out on me 2x already and thankfully I’ve only had to replace the break power booster only once. Now once the oil is changed the breaks go back to normal, there is no grinding of any sort heard, so now going forward I pay real close attention to my engine, I listen and pay attention to the feeling and sound of the breaks, once the oil begins to become low knowing it’s time for an oil change around 40% is when I start to feel a bit of the difference in the breaks and I can feel a little bit of grinding, no oil light has come on at this time nor has the oil light or any type of signal has ever come on at anytime to let me know that it was time for an oil change. I’ve checked for recalls, I’ve checked message boards, mechanics have no clue about this problem, but at least my mechanic does now!”