NHTSA Preliminary Evaluation: Electronic Brake Module Component Failure in 2023 Cadillac Lyriq (PE24-011)
Opened April 11, 2024 · General Motors, LLC
NHTSA opened a preliminary evaluation (PE24-011) on April 11, 2024 into electronic brake module component failure in 2023 Cadillac Lyriq. The investigation is closed on August 21, 2026.
PE24-011 at a glance
| NHTSA action number | PE24-011 |
|---|---|
| Type | Preliminary Evaluation |
| Opened | April 11, 2024 |
| Status | Closed August 21, 2026 |
| Vehicles | 2023 Cadillac Lyriq |
| Component | Service Brakes |
| Manufacturer | General Motors, LLC |
| Resulting recall | None listed |
What is NHTSA investigating in the Cadillac Lyriq?
From NHTSA’s investigation summary:
On April 11, 2024, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE24011 after receiving complaints concerning a loss of brake assist in 2023 MY Cadillac Lyriq vehicles.
These complaints allege a hard brake pedal, followed by a "Brake System Failure" message at start up or while driving.
GM shared records regarding several internal investigations for loss of brake assist due to alleged spindle fractures in the eBoost system.
GM has stated that in the event of a spindle fracture, anti-lock brakes (ABS), stability control, and traction control remain functional until the vehicle comes to a complete stop.
At this point, ABS, brake assist, stability control, and traction control functions are lost.
The loss of these functions causes the vehicle to set one of three Diagnostic Trouble Codes (DTCs) based on failed performance criteria for the Electronic Brake Control Module (EBCM).
These DTCs, in turn, activate several driver alerts: an audible chime, a visual "Service Brake System" message in the display, and multiple illuminated Malfunction Indicator Lights (MILs) for the ABS, Traction Control, and Brakes informing the driver of loss of functionality.
The vehicle speed will also be limited to 70 KPH (43 MPH).
Since opening PE24011, ODI has continued to receive reports of loss of brake assist.
Some of these reports describe symptoms inconsistent with GM's description of a spindle failure.
These reports allege an immediate loss of brake assist functionality as opposed to the loss occurring after the vehicle comes to a complete stop.
The sudden loss of brake assist during a braking event could result in extended braking distance, which increases the risk of a crash or injury.
ODI believes further analysis is necessary to assess the potential for failures in GM's eBoost system to resulting in safety-related outcomes.
At this time, ODI is aware of the following vehicles that are equipped with this eBoost system: 2023-2026 MY Cadillac Lyriq, Chevrolet Colorado, and GMC Canyon; 2024-2026 MY Buick Enclave, Envision; Chevrolet Blazer EV, Equinox EV, Traverse; Cruise Origin; and GMC Acadia; 2025-2026 MY Cadillac Celestiq and Optiq.
ODI is also aware of 2024-2026 MY Acura ZDX and 2024-2026 MY Honda Prologue vehicles that were built with this system.
The Acura and Honda vehicles were manufactured by GM in a joint venture with Honda, and will be included in the Engineering Analysis as peer vehicles.
ODI is upgrading this Preliminary Evaluation to an Engineering Analysis, EA26006, to gain further understanding ofthe safety-related consequences of a failed eBoost system.
In addition, ODI is expanding the scope of the investigation to encompass all GM vehicles that share this eBoost system.
To review the ODI reports cited in the Closing Resume ODI Report Identification Number document, go to NHTSA.gov.
What is a preliminary evaluation?
Preliminary Evaluation is the first stage of a federal defect investigation. NHTSA reviews complaints, crash reports and manufacturer data to decide whether a safety defect may exist. It can close with no action, be upgraded to an engineering analysis, or end with a recall.
Did this investigation lead to a recall?
NHTSA closed this investigation on August 21, 2026 without listing a recall. That can mean NHTSA did not find a safety defect it could prove, or that the manufacturer addressed the issue another way. A closed investigation does not mean owners have no lemon law claim if the problem keeps happening.
Which vehicles are part of this investigation?
| Model years | Make | Model |
|---|---|---|
| 2023 | Cadillac | Lyriq |
What are Cadillac Lyriq owners reporting to NHTSA?
NHTSA’s public database lists 22 owner complaints filed since 2020 for the vehicles in this investigation (all components). Complaints are unverified owner reports.
What should owners do?
- Check your VIN at nhtsa.gov/recalls for any open recall on your vehicle.
- If you have the problem NHTSA is investigating, take the vehicle to a dealer now and get a repair order, even if the dealer cannot find anything.
- Keep a log of every time the problem happens: date, mileage and what happened. Photos and videos help.
- File your own complaint at nhtsa.gov/report-a-safety-problem. Owner complaints are what start and expand investigations.
- If the problem keeps coming back, talk to a lemon law attorney.
Recalls on the same vehicles
- 2027 Chevrolet Bolt EV Owner's Manual Recall (26V114)
- 2024 Cadillac Lyriq Backup Camera Software Recall (26V082)
- 2026 Cadillac Vistiq High-Voltage Battery Recall (25V483)
- 2023-2024 Cadillac Lyriq Instrument Cluster Recall (25V356)
- 2023-2025 Cadillac Lyriq Stabilizer Bar Recall (25V232)
- 2025 Cadillac Lyriq Owner's Manual Recall (25V193)
- 2023-2024 Cadillac Lyriq Antilock Brake Control Module Recall (24V589)
- 2024 Cadillac Lyriq Electric Drive System Recall (24V320)
- 2023-2024 Cadillac Lyriq Seat Belt Anchor Recall (23V785)
- 2023 Cadillac Lyriq Body Control Module Software Recall (23V682)
Can a recall or defect investigation make my car a lemon in California?
Not by itself. What matters is whether a covered defect keeps coming back or keeps your vehicle at the dealer, and a federal investigation or recall is strong evidence that the problem is real.
Under California’s Song-Beverly Consumer Warranty Act, a manufacturer that cannot fix a warranty defect that substantially impairs a vehicle’s use, value or safety within a reasonable number of attempts may have to repurchase or replace it (Civ. Code 1793.2(d)). Within the first 18 months or 18,000 miles, the law presumes a reasonable number of attempts after two repairs of a defect likely to cause death or serious injury, four repairs of the same defect, or more than 30 days out of service (Civ. Code 1793.22(b)).
An owner who prevails can recover reasonable attorney fees and costs from the manufacturer (Civ. Code 1794(d)). You pay nothing, win or lose. We are paid only if you win, and the manufacturer pays our fees, including in settlements. If a case is lost, our firm covers the costs.
In our cases, a recall repair visit counts as a repair attempt, and it's strongest when the owner complained about the problem before the recall came out. A recall shows the defect is real and that enough owners reported it for the manufacturer to issue a fix.
The biggest mistake I see is waiting too long. The mileage offset starts at your first repair visit for the problem, so the sooner you take it in, the better. If the problem comes and goes, take it in when it happens. You can't go back to that date later.
If you get a recall notice, call a lemon law attorney right away. You may have taken the car in for the same problem before and forgotten, or there may be other recalls related to it.
Jacob Shayesteh, Esq. (SBN 362320), Founder and Managing Attorney. Quotes lightly edited for clarity. Prior results do not guarantee a similar outcome.
Frequently asked questions
Does the recall fixing my car mean I have no case?
Not necessarily. Even if the recall repair fixed it, you may still have a case, and a car that's a year or more old can still qualify.
Do used cars qualify for California lemon law?
We take certified pre-owned, demo and dealer vehicles. Since the California Supreme Court's Rodriguez decision in 2024, ordinary used cars generally do not qualify.
How long does a recall lemon law case take?
Recall-related cases typically resolve in one to three months from your first call. Prior results do not guarantee a similar outcome.
What does a lemon law attorney cost?
You pay nothing, win or lose. We are paid only if you win, and the manufacturer pays our fees, including in settlements. If a case is lost, our firm covers the costs.
Sources
- NHTSA investigation, recall and complaint data, accessed October 7, 2026
- California Civil Code 1793.22
Jacob Shayesteh, Esq., Founder and Managing Attorney of America’s Lemon Lawyer (Wynn Law Group, APC). Licensed by the State Bar of California, No. 362320. His practice focuses on California lemon law under the Song-Beverly Consumer Warranty Act.
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Attorney advertising. America’s Lemon Lawyer is a trade name of Wynn Law Group, APC. Responsible attorney: Jacob Shayesteh, Esq. (SBN 362320). This page reports public NHTSA data and is general information, not legal advice. Not affiliated with NHTSA or any vehicle manufacturer. Prior results do not guarantee a similar outcome.