2018 Chevrolet Malibu: brake failure

Filed Sep 26, 2026 · Acceleration, Brakes · IL

I was driving in town through a stoplight when I noticed my brakes stopped working. Also when I had stopped the car still in drive and the car had shut off completely in the middle of the road and was not able to turn back on. The car would keep trying start but none were successful. My car also stated that there was reduced power to the engine and the car would hesitate to gain speed as well. My safety and others were put to risk because my brakes stopped working so I could’ve caused an accident. When we trying to find what was wrong with it through a code reader we had noticed the piece had shattered inside of the engine. No insurance, police or manufacturer has inspected the issue.

Filed Aug 3, 2026 · Brakes, Engine · MS

I own a 2018 Chevy Malibu. At approximately 57,000 miles, the original engine experienced a vacuum pump failure that resulted in catastrophic engine damage. The engine was replaced by General Motors under the vehicle's warranty. I then drove the vehicle for approximately another 52,000 miles with the warranty replacement engine. At that point, I experienced a sudden loss of braking while driving. My vehicle was again diagnosed with a vacuum pump failure, and the vacuum pump was replaced. Approximately one week after the vacuum pump replacement, the warranty replacement engine suffered catastrophic failure. The repair facility diagnosed cylinder #3 scoring and informed me that the engine required replacement. I was told that the engine failure was related to the vacuum pump failure. Because the warranty replacement engine was no longer covered under warranty, General Motors initially declined to cover the repair. Initially, neither General Motors nor the Chevrolet dealership was willing to accept responsibility for the issue. After continued discussions, General Motors ultimately agreed to provide partial financial assistance as a goodwill adjustment. However, I was still left responsible for paying a substantial amount out of pocket to purchase and install a third engine. The cost has created a significant financial burden that I have struggled to afford, especially because the repair involved a component that I was informed has a known history of failure. I was also informed that vacuum pump failures are a known issue with these vehicles and that General Motors is aware of the problem, although no recall has been issued. I am submitting this complaint because I have experienced multiple vacuum pump failures, two catastrophic engine failures, and have now required three engines in the same vehicle. This has resulted in significant financial hardship, loss of use of my vehicle, and serious concerns about the safety and reliability of this vehicle.

Filed Jul 16, 2026 · Brakes, Engine · KS

While coming down McClure pass in Colorado my brakes failed. The the car went to engine power reduced mode. After getting the car to an independent mechanic I was told that the vacuum pump failed and exploded the parts into the camshaft. After 2 days of repairs I was finally able to get my car back to working order. This could have been a fatal car accident coming down a mountain pass. I was able to get stopped safely because I know the road. I had just driven 700 miles over Eisenhower Pass, Vail Pass, Glenwood Canyon, and then the final pass being McClure pass where it failed. I bought this car brand new and I probably won't buy another Chevy after this. This was a terrifying experience that I will have lasting trauma from.

Filed Jun 9, 2026 · Brakes, Engine · 150,000 miles · FL

The contact owns a 2018 Chevrolet Malibu. The contact stated that while driving on the interstate and attempting to exit the ramp at 40-45 MPH, the brakes failed. After restarting the vehicle, the check engine warning light illuminated. The contact related the failure to the federal safety agency Campaign Number: 18V576000 (Service Brakes, Hydraulic). The vehicle was towed to the local dealer, where it was diagnosed that the vacuum pump had failed. The vehicle was not repaired. The manufacturer was contacted, confirmed there was no recall and referred the contact to the federal safety agency Hotline. The approximate failure mileage was 150,000.

Filed Jan 6, 2026 · Brakes, Engine · 111,000 miles · AZ

The contact owns a 2018 Chevrolet Malibu. The contact stated that while coming to a stop, the brake pedal suddenly became inoperable. There was no warning light illuminated. The contact stated that excessive force was required to depress the brake pedal. The contact stated that the brake pedal went to the floorboard while stopping the vehicle. The contact then stated that after pulling into a parking lot, the contact attempted to restart the vehicle; however, the vehicle failed to start with the check engine warning light illuminated. The vehicle was taken to an independent mechanic, but was not diagnosed or repaired. The dealer was contacted, but the vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 111,000.

Filed Nov 22, 2025 · Acceleration, Brakes · UT

After diagnostic troubleshooting from DTCs on a check engine light, it was discovered that the brake vacuum pump connected to the engine was completely nonfunctional. Previous symptoms included stiff brake, loss of brake power at random brake periods which could have cause and accident with other drivers, and finally malfunctioning sensors attributed to the exhaust system. This also led the vehicle to be unable to pass state regulated Emissions testing because of the inability to maintain proper emissions levels. Brake Vacuum pump that was removed from vehicle to inspect and diagnose is still available for inspection. Recent findings show that Chevrolet/GM is aware of the issue in their vehicles but refuses to address or replace faulty brake vacuum pumps. It is a common problem amongst 2013-2022 Chevrolet Malibus. Vehicle that is in question was inspected by a certified mechanic shop with failed emissions test. Solid check engine light appeared once the brake had become harder to push and stop the car. OBD scans show DTC codes that were pertaining to MAF and MAP malfunctions in readouts and communications to the ECM. After further inspection, the ABS module had been acting as "backup" for hydrolic brakes system that had zero vacuum to power the brake booster, this could have caused the engine to stall, longer than normal stopping distances (stronger risk of rear ending other drivers), and multiple components and sensors to fail, requiring them to also be replaced.

Filed Nov 17, 2025 · Brakes · OK

The vacuum pump for the brake assist is made from bad metal which can break and screw up the camshaft, chevy knows of this problem they have a recall for the 2017 model but not the 2018 which they both have the same exact problem, they need to take care of this it is a major safety issue, I have no brakes and it could potentially ruin my engine.

Filed Apr 10, 2025 · Brakes · IN

I am filing a complaint regarding a brake vacuum pump failure in my 2018 Chevrolet Malibu. The failure of the vacuum pump led to a complete loss of brake assist, making the brake pedal significantly harder to press. This issue directly resulted in a complete loss of braking ability, which posed a serious safety risk while driving. The vacuum pump in these models is camshaft driven, and its failure caused damage to the camshaft. This issue is documented under GM Technical Service Bulletin PIP5835 and is known to affect certain 2016-2022 Chevrolet Malibu models equipped with the 1.5L LFV engine. The brake failure due to this issue could have led to a life-threatening accident, and I am deeply concerned that other drivers may experience this same risk. Despite reaching out to GM and the dealership, goodwill assistance was denied for this known defect. I believe this is a major safety hazard that needs to be addressed immediately. Vehicle Mileage ~120,000 Repair Estimate: $2106 for camshaft, vacuum pump, and related components Incident: The brakes became unsafe leading to a dangerous life threatening driving situation

Filed Sep 13, 2024 · Brakes · IL

Defective vacuum pump damaged camshaft, reduced engine power, and caused loss of brakes while driving.

Filed Sep 29, 2023 · Electrical, Transmission · CA

Today is 41 days with noises coming out of my car to 41 days to shift to park message again today my car wanted to turn off at the stop luckily I made it home to parking and again shift to park message came on GM supervisor never called me to the federal safety agency never helps so who do I run to for help I don't want to be injured or killed in this car on August 18,2023 while driving lost power to no gas no brakes to driving like this for five minutes to shutting down I'm I to be injured or killed in that when the federal safety agency gonna help me GM should be shut down and the federal safety agency should not say there helping you both are jokes....Help me and help all of us that have making complaints on these dam cars.....

Filed Sep 17, 2023 · Electrical, Transmission · CA

Warning lights never come up for the five years I've had it On August 18, 2023 while driving I lost power to no gas no brakes to driving like this for five minutes at the end shift to park message came on I was scared thank God I didn't die. On September 15,2023 Ed Denas dealership stated my car fine I disagree with them as again shift to park message comes up. On September 17, 2023 when I parked at my driveway I got the message shift to park. Please help me and please help 2018 Chevy Mailbu customers. That gm implement the recall or gm replacement or gm repurchase these 2018 Chevy Malibu this is the only car I have please help me. Thank you

Filed Oct 11, 2022 · Brakes, Engine · GA

My car just stopped in the middle of the road , and would not start again for a few minutes. Then is was in low power mode , no brakes either after that , found that problem to be a bad Vaccum pump , which G M didn’t even have , and a faulty Accelerator Pedal sensor !