On October 30, 2026, at approximately 3:10 PM, my 2009 Cadillac CTS experienced an apparent engine and brake system failure while I was operating the vehicle. The vehicle lost power, and I was unable to stop despite applying the brakes. The exact component or components that failed have not yet been identified. The vehicle is currently available for inspection by insurance representatives, mechanics, manufacturer representatives, or other authorized investigators upon request. The apparent engine and brake failure created an immediate safety hazard because I was unable to maintain control of the vehicle's speed or bring it to a safe stop. As a result, the vehicle struck utility power equipment near my residence. The incident placed me, nearby residents, pedestrians, and motorists at risk of injury. The collision also caused a power outage affecting homes in the surrounding neighborhood. At this time, the cause of the engine and brake failure has not been reproduced or confirmed by a Cadillac dealer or independent repair facility. The matter remains under investigation pending inspection of the vehicle and its components. The incident was reported to 911, and a police report was generated. The vehicle has been reported to my insurance carrier, USAA. As of the date of this statement, the vehicle has not yet been inspected by General Motors or a Cadillac dealer for purposes of determining the cause of the failure. Additional inspections may be conducted by insurance representatives, repair specialists, or other qualified parties. Prior to the incident, I did not observe any warning lamps, brake system alerts, engine warnings, or other messages that would have indicated an imminent loss of braking capability or engine failure. The failure occurred suddenly on October 30, 2026, at approximately 3:10 PM. The vehicle had recently undergone a 120,000-mile service inspection, and no issues were identified that would have suggested an imminent catastrophic failure.
Cadillac CTS brake failure problems
52 of the 2,220 owner complaints about the Cadillac CTS describe brake failure, most of them for the 2007 model year.
- owner complaints
- 52
- worst model year
- 2007
- typical mileage
- 71,000
By model year
Often reported together
ABS 9No deployment 4Loss of power 3Fuel gauge 3Engine failure 3Sudden acceleration 2Stalling 2Power steering loss 2
What owners say
Component Affected: SERVICE BRAKES Description of Safety Defect & Incidents: Experienced a recurring, systemic mechanical failure within its camshaft-driven brake vacuum assist system, creating an imminent crash hazard on public roadways. On two separate occasions while traveling at operational roadway speeds trying to slow down for an interchange, the vehicle suffered a sudden, catastrophic loss of power brake assistance. The brake pedal instantly became completely rigid, hard pedal, requiring maximum physical exertion to slow the vehicle and drastically extending the emergency stopping distance.Repair History & Manufacturer Involvement: The primary brake vacuum pump was initially replaced by an authorized Cadillac dealership in July 2023. Following that service, the "Brake Assist" warning lamp remained persistently illuminated. I called the dealership to ask how I can reset the warning and no one called me back, so I just lived with it. After driving only approximately 5,000 miles over 3 years, the system completely failed again, causing the second aforementioned on-road moving brake failures.The vehicle was towed back to the authorized Cadillac dealership on June 29, 2026, and has remained continuously out of service in their possession for nearly four months (113+ days) as of late October 2026. Dealership technicians have hit a diagnostic wall. They have repeatedly replaced parts, brake vacuum pump, vacuum sensor hose, brake booster twice during this single visit, and the brake master cylinder. Despite these component replacements, diagnostic fault codes remain active, check engine and brake warning lights remain illuminated, and power braking function cannot be reliably restored.The failure is so severe that the dealership has opened two concurrent General Motors Technical Assistance Center (TAC) cases, and a corporate GM Field Engineer was deployed to inspect the car, which recommended to replace master cylinder on 09/22/2026, no contact since, no loaner.
Brakes failed. This happened at low speed and control was kept of the vehicle. Upon inspection, it was seen the flexible brake line connecting the driver's side brake caliper had separated at the point it transitions from rubber to metal. It happened immediately after turning right at a stop light and there was no warning. The design of the transition meant that there was no leak of fluid (warning) until the connection had corroded to the point it lost its strength, failed and completely detached. The local GM dealership was called and they advised there was no recall and would only work on the vehicle for payment, so it was not taken to them. The components were replaced on both sides. Old parts have been kept.
Complete brake line failure due to corrosion as described in Recall Number 10V105000 / 09149B. Original equipment retained from rear brake line repair for future inspection / litigation. CADILLAC REFUSED TO REPAIR / REPLACE / REIMBURSE FOR BRAKE FAILURE UNDER RECALL BULLETIN 09149B.
Tl* the contact owns a 2003 cadillac cts. While driving various speeds, the brake line failed and the check brake indicator illuminated. The contact took the vehicle to an unknown dealer where it was diagnosed with brake failure. The contact discovered the federal safety agency campaign number: 15v225000 (service brakes, hydraulic), which he related to the failure. The manufacturer stated that the VIN was excluded from the recall. The vehicle was not repaired. The failure mileage was 144,000.
While turning left at low speed the brakes failed so I centered the steering wheel and the car stopped.
Front brake lines rusted causing loss of brake fluid.
My husband was driving home and the brakes went out and he had to pump them to be able to stop. Upon reasearching the campaign number came up. His brake light came and and upon inspecting the brake lines and checking the fluid it was low and the lines appear to be corroded. Cadillac stated there is not active recall.
I just think this needs documenting. My rear brakes leaked fluid and went completely empty about 7 years ago and I had no brakes. Fortunately, I was going slowly and close to home. I had the car towed and they replaced a section of the lines. Cost $208 plus tow. A short time later gm recalled the car because of rusting problems in the front of the car. It was repaired under the recall. Last week I was sitting at a light and my brake pedal began to move closer to the floor. The fluid did not completely leak out and I was close to home and got to my mechanic just as the brakes went completely. This time there was rust in one line near the engine. They said it was behind the fuel filter. He spliced in pieces to both lines. Cost $187. I have owned about 20 cars and never had any problems of this nature, never mind 3 times. Three problems in a potentially life threatening situation is the reason I am notifying you. I looked online and a number of others expressed things concerning this. Thank you.
Was driving and service brake assist message came on two days ago along with the ABS t/c light on the dash. I had no idea what it meant so I've kept driving. About an hour ago I was getting ready to park into my garage and the brakes would not work and I almost crashed into a parked car. Again the service brake assist light came on. I'm 7 months pregnant and this is my only transportation. I'm not looking to get into an accident due to my brakes failing. My service air bags message also comes up and even with a passenger in the car it doesn't state that the passenger air bag is on. I am pretty sure both of these issues were part of a recall but I hadn't owned the car during that time. As of now this car is a fatal accident waiting to happen and I'm unsure as to why there isn't still an open recall to address this brake failure issue.
Related recalls
Service brakes, hydraulic: pedals and linkages
- What is wrong
- General Motors LLC (GM) is recalling certain model year 2015 Cadillac ATS and CTS vehicles. The affected vehicles have a bracket between the brake pedal assembly and the rod that actuates the brakes that may fracture during normal brake pedal operation.
- Risk
- If the bracket fractures, the driver would not be able to apply the brakes, increasing the risk of a crash.
- Remedy
- GM will notify owners, and dealers will inspect the vehicle and replace any affected bracket, free of charge. The recall began July 6, 2015. Owners may contact Cadillac customer service at 1‑800‑458‑8006. GM's number for this recall is 15352.
Recall number 15V358000 · Recall details
Service brakes, hydraulic: power assist: vacuum
- What is wrong
- Gm is recalling certain model year 2012 cadillac cts vehicles manufactured from october 21, 2011, through october 26, 2011. These vehicles may have a condition in which the power vacuum brake boost pushrod retention nut may not be torqued to the proper specification. If the nut is not torqued to the proper specification, the nut could loosen and allow the pushrod to separate from the brake pedal.
- Risk
- This could result in a loss of ability to brake and a vehicle crash without prior warning.
- Remedy
- Cadillac dealers will inspect the power vacuum brake boost pushrod retention nut, and if necessary, torque the nut to the proper specification. This service will be performed free of charge. The safety recall began on november 1, 2011. Owners may contact cadillac at 1‑800‑458‑8006.
Recall number 11V536000 · Recall details
Service brakes, hydraulic: foundation components: hoses, lines/piping, and fittings
- What is wrong
- General motors has notified the federal safety agency of a defect in certain model year 2003-2007 cadillac cts vehicles currently registered in or originally sold in connecticut, delaware, illinois, indiana, iowa, maine, maryland, massachusetts, michigan, minnesota, missouri, new hampshire, new jersey, new york, ohio, pennsylvania, rhode island, vermont, washington d.c., west virginia and wisconsin. Some of these vehicles have a condition in which the front brake hose fitting at the caliper may corrode due to snow or water, containing road salt or other contaminants, entering and being retained in the routing sleeve. If the fitting corrodes significantly, the brake hose-tube interface may develop a leak.
- Risk
- The brake hose-tube interface may rupture suddenly without prior warning and increase vehicle stopping distance may occur increasing the risk of a crash.
- Remedy
- Dealers are to replace both front brake hose assemblies free of charge. The safety recall is expected to begin during may 2010. Owners may contact cadillac at 1‑866‑982‑2339 or at the owner center at www.gmownercenter.com.
Recall number 10V105000 · Recall details
Questions about the Cadillac CTS brake failure
Which Cadillac CTS years have brake failure problems?
The model years with the most reports are 2007 (13 complaints), 2006 (10 complaints) and 2004 (8 complaints).
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