Sudden braking, false collision warnings, and unexpected system failures—Honda’s Collision Mitigation Braking System (CMBS) has been a source of frustration and safety concerns for many owners. Since a federal investigation in 2018, reports of collision mitigation system problems such as ‘phantom braking‘ and malfunctioning sensors have only increased, leading to potential risks on the road.
Understanding these issues and knowing the right solutions can help Honda owners maintain safety and ensure their vehicle’s advanced safety and collision avoidance systems function properly. Here’s what you need to know about the most common CMBS problems, troubleshooting steps, and Honda’s response to these concerns.
Most Common Honda’s Collision Mitigation System Problems
Drivers have reported over 1,294 complaints regarding Honda’s CMBS, with major concerns involving phantom braking—when the system detects an obstacle that isn’t there, triggering unnecessary braking.
Key CMBS Issues:
- False Braking Alerts: The system may trigger sudden stops without obstacles, increasing the risk of rear-end collisions.
- Sensor Malfunctions: The radar sensor (located in the front grille) or camera system may misinterpret objects, leading to false alarms or failure to detect real hazards.
- Adaptive Cruise Control Errors: The system may disengage unexpectedly, making highway driving unpredictable.
- Forward Collision Warning Issues: Some drivers experience alerts that activate too late or not at all, reducing the effectiveness of crash prevention.
- Lane Keeping Assist Malfunctions: Misaligned or dirty sensors can cause incorrect lane correction, making the vehicle veer unexpectedly.
These Honda braking issues have been linked to 47 crashes and 93 injuries, making it essential for Honda owners to recognize warning signs and seek proper solutions.
Diagnosing and Troubleshooting System Problems
If your Honda Collision Mitigation Braking System is acting unpredictably, diagnosing the issue is the first step toward a fix.
How to Identify CMBS Problems:
- Check for Dashboard Alerts: Error codes related to CMBS can indicate a system malfunction.
- Inspect Sensors for Obstructions: Dirt, ice, or debris can interfere with proper functioning.
- Monitor Braking Behavior: If your vehicle is braking unexpectedly, it’s a strong indicator of system failure.
- Look for Software Updates: Honda periodically releases software patches to improve performance.
Troubleshooting Steps:
- Clean or Realign Sensors: If dirt or misalignment is causing false alerts, professional calibration may be necessary.
- Reboot the System: Turning the CMBS off and restarting the vehicle can sometimes reset minor glitches.
- Visit a Honda Service Center: If issues persist, dealership technicians can run a full diagnostic scan and recalibrate the system.
A faulty radar sensor or camera misalignment is a frequent culprit, and recalibration or replacement may be needed to restore functionality.
Maintenance and Repair: What Honda Owners Should Know
Regular maintenance and timely repairs can significantly reduce the likelihood of CMBS malfunctions.
Preventative Measures:
- Keep the Front Radar Sensor Clean – Dirt and debris can lead to false warnings.
- Perform Regular System Checks – A routine diagnostic scan at a Honda dealership can catch potential issues early.
- Ensure Proper Sensor Alignment – A misaligned sensor can lead to inaccurate readings and unexpected braking.
- Update Your Software – Honda periodically releases software updates to fix known system flaws.
Estimated Repair Costs:
- CMBS Sensor Recalibration: $150 – $300
- Radar Sensor Replacement: $500 – $1,200
- Camera System Repairs: $600 – $1,500
Honda has issued technical service bulletins (TSBs) and recalls addressing collision mitigation braking issues, and affected owners should check their VIN on the Honda recall website for eligibility.
Safety & Reliability Concerns
Affected Models & Safety Risks
The National Highway Traffic Safety Administration (NHTSA) has received thousands of complaints related to CMBS issues, prompting federal investigations and class-action lawsuits.
Honda models affected include:
- 2020-2022 Accord
- 2019-2022 CR-V, Insight, and Passport
- 2018-2022 Pilot and Ridgeline
A 2022 class-action lawsuit alleges that Honda’s failure to address CMBS defects has led to an increased risk of accidents, further damaging consumer trust in the brand’s safety technology.
Recalls, Updates, & Next Steps for Owners
Honda’s Response & Fixes
The NHTSA investigation led Honda to expand its recall efforts in 2024, covering nearly 3 million vehicles, including Accords and CR-Vs.
What Owners Should Do:
- Check for Recalls: Enter your VIN on Honda’s recall website or the NHTSA recall database.
- Schedule a Free Repair: If your vehicle is included, visit an authorized Honda dealership for CMBS recalibration or sensor replacement at no cost.
- Stay Updated: Keep track of the latest software updates and safety notices issued by Honda.
Honda’s Future Safety Measures
To restore consumer confidence, Honda is actively working on improving CMBS technology in newer models, including enhanced radar sensors and improved AI-based object recognition.
Do Collision Mitigation System Problems Make Your Honda a Lemon?
If you’re experiencing persistent CMBS failures despite multiple repair attempts, your vehicle may qualify for relief under lemon laws.
How Lemon Law Can Help:
- You may be eligible for a full refund, replacement vehicle, or cash compensation.
- Legal action may be necessary if Honda fails to fix recurring safety issues.
- Consulting a lemon law attorney can help determine your rights and options.
For expert legal assistance, LemonLawFirm.com specializes in Honda CMBS claims and can help you navigate your case. Contact us today for a free case evaluation and find out if your Honda qualifies as a lemon.
Stay Safe on the Road
Understanding the problems and fixes for Honda’s Collision Mitigation Braking System is key to staying safe behind the wheel. If your vehicle continues to experience phantom braking, false alerts, or safety malfunctions, take action now by scheduling an inspection or seeking legal recourse if necessary.
Have ongoing issues with your Honda CMBS? Contact LemonLawFirm.com today for expert guidance on your legal rights and next steps.