Investigations
Electronic Brake Module Component Failure
NHTSA Preliminary Evaluation PE24011 — open, opened 2024-04-11 and involving the CADILLAC CADILLAC.
NHTSA investigation PE24011 is a Preliminary Evaluation opened on 2024-04-11 and currently open. The subject of record is CADILLAC CADILLAC, which places this file inside the Office of Defects Investigation queue for CADILLAC. Latest activity on this investigation was logged on 2024-04-11 — NHTSA updates that field whenever an Information Request goes out, a supplement is filed, or a status change is recorded in the public docket.
A Preliminary Evaluation like PE24011 is the entry point of the federal defect-investigation process. NHTSA engineers scan complaint databases, field reports, and manufacturer data to decide whether an Engineering Analysis is warranted, whether a voluntary recall is already sufficient, or whether the pattern does not rise to a defect finding.
Investigators summarized the matter as follows: "The Office of Defects Investigation (ODI) has received multiple Early Warning Reporting field reports alleging a loss of brake boost assist in MY2023 Cadillac LYRIQ vehicles. The reports allege a hard brake pedal, follow..." Investigations are the early-warning layer of the federal auto-safety system, sitting upstream of formal recalls and defect orders. Whether this one closes without action or escalates into an Engineering Analysis, the full history stays in the ODI archive so researchers, litigators, and buyers can pull the paper trail at any time. Related CADILLAC files, listed below, give context on whether this is an isolated concern or part of a broader pattern across the brand.
Investigation Summary
The Office of Defects Investigation (ODI) has received multiple Early Warning Reporting field reports alleging a loss of brake boost assist in MY2023 Cadillac LYRIQ vehicles. The reports allege a hard brake pedal, followed by a “Brake System Failure” message at start up or while driving. The EWR field reports have been verified by General Motors (GM). GM stated the electronic brake control module, also known as “eBoost”, has an internal spindle that can fracture during an Anti-Lock Braking System (ABS) event. GM further stated that due to the fracture, the vehicles can lose brake assist, experience speed limitation, and ABS would lose some functionality. GM indicated a new material clean break point was introduced in the assembly plants in May 2023. GM has also developed an over the air (OTA) update, which will cycle the brake booster similarly to an ABS event at start-up for every key cycle. If the spindle fractures during this start-up cycling, a warning lamp will illuminate to prompt the customer to bring the vehicle to the dealership to be diagnosed and repaired under warranty. This software update was not conducted as a recall. ODI is opening this Preliminary Evaluation (PE) to determine the scope and severity of the potential problem and to fully assess the potential safety-related issues.
About This Investigation Type
A Preliminary Evaluation (PE) is the first phase of NHTSA's investigation process. It is opened when the agency identifies a potential safety defect pattern, usually triggered by consumer complaints, manufacturer reports, or field monitoring. During a PE, NHTSA gathers information to determine whether a formal engineering analysis is warranted.
Other CADILLAC Investigations
Rear-View Camera Failure
Roof Skin Separation While Driving
IEE Passenger Sensing System Mats
REAR DRIVETRAIN COMPONENT FAILURE
FAILURE OF THE REAR DIFFERENTIAL
Data from NHTSA Office of Defects Investigation. Cross-references: NHTSA recall campaign API and NHTSA FARS where fatality records overlap. PlainCars does not rate or recommend vehicles. Learn more.
Read our methodology — how this data is sourced, computed, and verified.