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.
2018 Chevrolet Malibu brakes complaints
Page 2 of 3: complaints 11 to 40 of 69, newest first, as owners wrote them.
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.
Shift to park
The rear knuckles on these cars are constantly going bad and the parts are expensive and so is the labor. So we have to pay a fortune to fix a common issue that GM should be recalling and fixing for the people who buy these vehicles. It's crazy how common this issue is and it's still not recalled. If you hear a clunking/rattling noise coming from the back of your car then it's almost certainly a knuckle problem.
I was informed the vacuum pump went bad and rendered the vehicle inoperable. The vehicle would lose acceleration, shut off during auto stop and caused me to block traffic. The brakes also locked up, which almost caused me to crash in a residential neighborhood. I tried to see if there was a recall on this but I was told the recalls were handled in January of 2020 but I started driving the vehicle between July and August of 2020. This incident I'm reporting just happend 3 weeks ago. I realized there are many other issues regarding this matter and need this addressed because this almost caused bodily harm. The dealership wants me to pay for repairs on a vehicle that seem to have defective parts that jeopardise customer safety and is not being rectified.
Vacuum pump stopped working and shattered into my engine. Breaks suddenly stopped working while driving.
The contact owns a 2018 Chevrolet Malibu. The contact stated that while attempting to stop the vehicle, the brake pedal was firm while depressed, and the vehicle failed to immediately stop. The vehicle was taken to the independent mechanic who diagnosed that the brake vacuum pump was faulty and needed to be replaced. The vehicle was not repaired. The local dealer and manufacturer were notified of the failure, but no assistance was provided. The failure mileage was 104,000.
[XXX] , hard brake vacuum pump something’s wrong car won’t push down break INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
I am writing to formally report a serious safety concern with my 2018 Chevy Malibu related to the brake booster vacuum pump. My vehicle has exhibited dangerous symptoms, including a hard brake pedal and reduced braking power, which I’ve now learned may be connected to a known defect affecting 2013–2022 Malibu models. These issues have significantly compromised my safety and that of others on the road. I’ve had to deal with sudden braking difficulties, and the repairs have caused financial stress I was not prepared for. I am now aware of the pending class action lawsuit (Johnson v. General Motors LLC) that details this same problem.
loud knocking or banging noises, the check engine light turning on and/or other driving performance issues, such as reduced propulsion cranksaft
My breaks locked up on me pulling out of my driveway. The break pedal was hard to press down and I had to step on the braks really hard to stop .
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
My car brakes kept locking up and it was hard to get my car to finally stop today. There was no brake sensor or warning light. Should there be a warning light or sensor on my desk board to tell me something is wrong with my brakes ?
Brake vacuum booster exploded into the engine.
I repeatedly get a “reduced power to engine” alert on my dash which causes my car to decelerate and I lose my power steering. This last time, the alert popped up on my dash, my car decelerated, and then my brakes would not work. I could not push the brake down to stop my car and ended up in a ditch. My brakes are now hard and I cannot start my car because of it. I have already had the recall for this issue fixed in the past but this will be the 3rd time I have brought my vehicle in for the same problem. I had diagnostic codes ran on my car soon after the accident happened and have attached the pictures to this form.
While driving the speed suddenly reduced and brakes locked up on me. I was lucky enough to be able to veer to the left and get off the busy street without crashing into anyone or anything. When I stopped the car cut off and would not start back up even with a jump. This happened to me twice before and they did a recall on the same part. I need ot fixed again. I also had to replace the battery every time including this time.
Defective vacuum pump damaged camshaft, reduced engine power, and caused loss of brakes while driving.
Brake pedal became hard to press down and could not stop car without having to jam down on the pedal. Per dealership the vacuum pump malfunctioned causing metal to enter engine
While driving th vehicle the component that ruptured was the vehicles vacuum brake booster pump which connected directly to the engine. The ruptured caused shards of metal to be launched into the engine resulting in no brake power and needs an engine swap. There was a recall on this model vehicle for the Pedal sensor malfunction that results in the cars engine going into a reduced power mode abruptly and suddenly while driving. This malfunction has occurred on this vehicle and I was not aware of this vehicle models recall history but it stated that the recall was successfully closed out in 2020. I purchased my 2018 Chevy Malibu in the year 2021 and the issue still persist. I am not confident that the recall on this vehicle was either fully completed or successfully fixed before purchasing. The car is now at the dealer and the repair team explains the vehicle needs a new engine. I questioned about the pedal sensor malfunction and asked if it was possible that this malfunction sending the vehicle into a reduced power mode so suddenly could have effected or cause wear and tear on brake booster pump connected to the engine. The dealers repair team wasn’t confident in saying it wasn’t possible. This is likely a design issue and if a recall was completed and I was sold a vehicle uninformed of this potential issue but the malfunction still persisted I do not believe I should have to cover the full cost of repairs for this chain of events. This malfunctioned put me at danger and if it had occurred while my wife and 3 children were in the car it could have been life threatening not only to us but the other drivers around as well. With the engine reduced you can’t accelerate and with the booster pump ruptures mid drive you lose all brake power. It is hard to understand the faulty design in this but I have read reviews that others have had the same issue so I do not believe I am alone in this.
Driving normal. Upon application of brakes, brake pedal became stiff and brakes did not function normal. Had to apply immense pressure to stop and it sounded like brakes kept locking up. Vacuum pump that supplies vacuum for engine with turbo to function, along with the brake booster to be able to apply normal braking power, was destroyed. The inside of the vacuum pump is in pieces and part of the bushing that connects into the engine was broken. Caused by faulty vacuum pump, or faulty cam shaft. If this had happened while in traffic, it is likely a crash would have happened. Damage caused to the vacuum pump resulted in metal pieces in the engine block as well.
Car does not recognize when the shift is on park. States to put car in park despite it being in park. Could take up to 10 minutes for the system to finally recognize the gear.
The contact owns a 2018 Chevrolet Malibu. The contact stated while operating the vehicle, the message "Engine Power Reduced" was displayed and the vehicle would not properly accelerate above 30 MPH. Additionally, while depressing the brake pedal, the vehicle failed to immediately stop, and the pedal was firm when depressed. The vehicle was later towed to the local dealer. The cause of the failure was unknown. The manufacturer was not yet notified of the failure. The failure mileage was 50,000.
I was driving down the highway and took the exit and went to hit the brake pedal and it was hard to push down. Took it into a shop for diagnosis/repair. Mechanic found that vacuum pump for brakes came apart. There is currently metal in the engine that I cannot afford to fix after already paying $500 for the new vacuum pump.
I was driving my small child to school and my car had a service message pop up that said engine power reduced and then my brake pedal became stiff to the point where I could not push it down at all to stop at a red light. Luckily by quick thinking I push down my emergency brake to avoid from hitting other cars. From doing research this is not the only complaint about this same similar situation on this car (2018 Chevy Malibu LS) It's ridiculous. It's going to cost me over $2000 for parts and for labor.
The contact owns a 2018 Chevrolet Malibu. The contact stated while driving approximately 60 MPH, the braking system failed, and the brake pedal became firm while depressed. The "Engine Power Reduced" message was displayed, and the vehicle went into LIMP Mode, causing the vehicle to decelerate. The vehicle was later towed to the local dealer who diagnosed the vehicle and determined that the braking system vacuum booster pump had failed and needed to be replaced, along with the camshaft and crank case which were damaged during the failure. The vehicle was not yet repaired. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 107,000
Vacuum Booster Pump failed while driving on the highway with my girlfriend and her small child in the car and this common problem for this specific Chevrolet motor and endangered our lives significantly. Over 500 complaints on the federal safety agency website. No recalls to date. $4,000 damage. Filed official complaint and requested that Chevrolet cover the costs.
Service Stabilitrak warning will pop up on my dash. The car loses power. Push on the gas and it sputters. Had it serviced by GMC 2 years ago and now it is happening again. More frequent in colder weather. There are thousands of reddit posts about this same issue from other 2018 Chevy Malibu owners. GMC refuses to acknowledge it is a quality or performance issue on their end.
I was driving the vehicle on a busy road and a message came up on the display above the steering column saying Engine Power Reduced. I went to brake and was unable to push the pedal in as it was extremely stiff. There were vehicles around me and I tried to use both feet and stand on the brakes and was able to get a little bit of movement but the car still didn't slow down. I had my significant other and brother-in-law in the car and we were all horrified we were going to get into an accident. I turned the hazard lights on and was able to steer to avoid hitting several vehicles and when traffic finally cleared I was able to get over and off the road into a gas station that was uphill and allowed us to slow down and finally stop because I put the vehicle in neutral tried the parking brake which got us to a complete stop and shut the vehicle off. There had been no previous issues with the brakes or messages such as the one that came up right before this issue occurred. The vehicle had to be towed and the repair shop told me the cam driven vacuum pump failed which caused the brake booster to not function. When this failure occurred, it damaged the intake and exhaust camshafts, crankshaft, and several other components. The cooling system and oil to be flushed out as I was told there was metal debris from the damaged parts caused by the vacuum pump failure in the fluids which had been all completely flushed and changed including cooling system, transmission fluid, and oil change The total cost of repairs as a result of the vacuum pump failure setting off a Domino effect of damage was $3536.40.
Just now getting to Walmart my shift to park message came on my 2018 Chevy Mailbu
Today again shift to park message came on
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