Tag Archives: Brake Problems

Mercedes-Benz Expands S-Class Brake Hose Recall

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If you drive a recent-model Mercedes-Benz S-Class, Maybach, or AMG sedan, take note: Mercedes-Benz USA (MBUSA) has broadened an earlier safety campaign regarding potential front brake hose failure. Filed under NHTSA Campaign Number 26V-638, this action covers 30,064 vehicles across multiple high-end model lines.

What Is the Defect?

According to Mercedes-Benz AG (MBAG), the front axle brake hoses on affected vehicles may suffer from accumulated material fatigue. Over time, increased thermal and mechanical stresses sustained during regular driving can cause the brake hoses to rupture and leak fluid.

The Risk

Vehicles use a dual-circuit system. If fluid escapes from a damaged front hose, it leads to a loss of hydraulic pressure in one of the circuits. While the backup circuit ensures the car can still stop, overall stopping performance will be significantly reduced, increasing stopping distances and raising the risk of a crash.

Affected Vehicles

This expanded action affects 2022–2025 model year vehicles in the flagship S-Class (223 platform) lineup:

  • 2022–2025 Mercedes-Benz S 500 4MATIC
  • 2022–2025 Mercedes-Benz S 580 4MATIC
  • 2023–2025 Mercedes-Benz S 580 e 4MATIC
  • 2022–2025 Mercedes-Maybach S 580 4MATIC
  • 2022–2025 Mercedes-Maybach S 680 4MATIC
  • 2024–2025 Mercedes-AMG S 63 E Performance

How Did the Investigation Unfold?

This update builds upon NHTSA Campaign 25V-116, originally filed in February 2025.

  • The Initial Scope: MBAG initially attributed the brake hose failures to specific production windows and hot, humid regions where early cases were clustered.
  • New Field Data: Between March and August 2025, MBAG received additional field reports from outside the U.S. involving vehicles operated in different climates and built outside the original production time frame.
  • Engineering Review: MBAG launched a dedicated Field Engineering Activity in March 2026 to collect and analyze field components. Laboratory and durability testing completed in July 2026 confirmed that the risk applied to all vehicles produced up to the implementation of a redesigned brake hose in series production.
  • Current Status: On September 25, 2026, MBAG officially decided to broaden the affected population. While three U.S. reports were identified between April and August 2026, there have been no reports of crashes, injuries, or property damage related to this condition.

Warning Signs to Watch For

Due to the nature of material fatigue, there are no advance warning signs before a leak develops.

However, if fluid loss occurs while driving:

  1. A red brake fluid warning message will display in the instrument cluster.
  2. You may notice increased brake pedal travel or reduced stopping power.

2025 Ford and Lincoln Brake Assist Issue Could Increase Crash Risk

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Ford Motor Company has announced a safety defect affecting several 2025 Ford and Lincoln models due to a potential braking issue. Certain vehicles may experience a loss of power brake assist, which could extend stopping distances and increase the risk of a crash—particularly when Advanced Driver Assistance System (ADAS) features are in use.

Which Ford And Lincoln Vehicles Are Affected?

The recall involves specific 2025 models, including:

  • Ford F-150
  • Ford Expedition
  • Ford Bronco
  • Ford Ranger
  • Lincoln Navigator

Ford’s investigation found that the Electronic Brake Booster (EBB) module may malfunction while driving or when ADAS features are active.

What’s the Problem?

The issue was first detected on May 14, 2025, when the Expedition/Navigator Rapid Response Team identified a Ford Management Lease Vehicle with a loss of brake boost. The malfunction triggered a Diagnostic Trouble Code (DTC), prompting Ford to review connected vehicle data, driver reports, and incident logs.

Customers reported a sudden loss of brake boost, along with extended brake pedal travel and longer stopping distances. While Ford confirmed that affected vehicles still meet Federal Motor Vehicle Safety Standards (FMVSS 135, 105, and 126), the unexpected nature of the issue poses a safety risk.

Incident Reports

  • Between March 13 and June 26, 2025, Ford received 37 warranty claims related to this problem.
  • As of July 14, 2025, there has been one alleged low-speed crash potentially linked to the defect.
  • No injuries or fires have been reported.

The Recall Process

On July 18, 2025, Ford’s Field Review Committee approved a field action.

  • The fix involves an Electronic Brake Booster software update, which can be delivered over-the-air (OTA) or performed at a dealership.
  • Owner notification letters are expected to be mailed on August 25, 2025.
  • Ford recall number: 25S77
  • NHTSA campaign number: 25V-488

What Owners Should Do If Their Ford Or Lincoln Is Affected

If you own one of the affected vehicles:

  1. Schedule a dealer visit or wait for the OTA update if applicable.
  2. Monitor your braking performance, especially when using ADAS features such as adaptive cruise control or automatic emergency braking. If you experience unusual brake feel or extended stopping distances, seek service immediately.

Safety Reminder

Even with this issue, Ford states the braking systems remain functional, but stopping distances may be longer without power brake assist. Extra caution is advised until the repair is complete.

Braking Safety Concern In 2025 Nissan And Infiniti Vehicles

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Nissan has issued a recall for certain 2025 model year Murano, Pathfinder, and Infiniti QX60 vehicles due to a potential braking safety issue. The problem affects the front brake caliper assemblies, which may have reduced strength and could break, leading to reduced braking performance.

The issue was discovered in January 2025 during a routine production brake test on a 2025 Nissan Pathfinder. A technician reported a failure of the front right-hand brake caliper assembly, prompting Nissan to quarantine the defective part and launch an investigation. Further analysis revealed that the suspect brake caliper had been produced with a common supplier production lot code (51A), which was found to have an inadvertent modification to an internal parameter setting. This modification reduced the material’s strength, making it more prone to failure.

The supplier’s investigation confirmed that a total of 3,115 caliper castings were produced in the affected lot and shipped to Nissan for assembly into vehicles. Through traceability records, Nissan identified 2,341 vehicles that may have received a potentially affected brake caliper. Of these vehicles, 711 were held for inspection, while 200 had been exported and 1,430 had previously been shipped to the US.

According to Nissan, if one or both of the front brake calipers fail, it can result in reduced braking performance and may not comply with certain performance requirements of Federal Motor Vehicle Safety Standard (FMVSS) 135. This could increase the risk of a crash, particularly if drivers are unable to stop their vehicles in time. Affected customers may notice uneven braking performance, and the “Low Brake Fluid” warning light may illuminate in certain cases.

To address the issue, Nissan will be recalling affected vehicles and asking owners to return to their dealerships for an inspection and replacement of the front brake caliper assemblies as necessary. Owner notification letters are expected to be mailed on May 9, 2025. The recall is identified as Nissan’s numbers PD137 and PD138, and the NHTSA campaign number is 25V-173. This issue highlights the importance of rigorous testing and quality control measures in ensuring the safety of vehicles on the road.

2025 Chrysler Pacifica PHEVs – Insufficient Bolt Torque on Front Brake Caliper Bracket

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A potential safety issue has been identified in some 2025 Chrysler Pacifica Plug-In Hybrid Electric Vehicles (PHEVs) that may have been produced with insufficient bolt torque on the front brake caliper bracket. The problem, which affects vehicles produced on December 19, 2024, can lead to a range of serious consequences, including reduced steering control, brake fluid leakage, and diminished front braking performance.

According to FCA US LLC (FCA US), the issue was first identified on February 20, 2025, when the Technical Safety and Regulatory Compliance (TSRC) organization opened an investigation into the matter. The company worked with its engineering team and supplier to understand the potential consequences of the problem and determine if any vehicles with suspect front brake caliper brackets had left the factory.

As of March 13, 2025, FCA US is aware of one warranty claim related to this issue, which was received on January 8, 2025. However, there have been no field reports of accidents or injuries resulting from the problem.

The suspect vehicles were produced with front brake caliper bracket bolts that were not properly torqued, which can cause the bracket to separate from the steering knuckle. This can lead to a range of serious safety issues, including reduced steering control and diminished braking performance. In certain crashes, this can increase the risk of injury to occupants of the vehicle.

To address the issue, FCA US will be conducting a recall of affected vehicles. Dealers will inspect and replace the front brake caliper brackets and bolts as necessary, free of charge. Owner notification letters are expected to be mailed on April 24, 2025. The recall is identified as FCA’s number 27C and the NHTSA campaign number is 25V-191.

Vehicle owners who receive a notification letter should contact their local Chrysler dealer to schedule an appointment for the inspection and repair. It is essential to have the issue addressed promptly to ensure the safety of the vehicle’s occupants and other road users. The recall highlights the importance of regular maintenance and inspections to identify potential safety issues before they become major problems. FCA US’s prompt action in addressing the issue demonstrates its commitment to ensuring the safety and quality of its vehicles.

If you own a 2025 Chrysler Pacifica PHEV, it is essential to be aware of this potential issue and take immediate action if you receive a notification letter. By doing so, you can help ensure your safety and the safety of others on the road.

Unexpected ABS Activation In 2024 Acura ZDX All-Wheel Drive Vehicles

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In a concerning development for Acura ZDX All-Wheel Drive owners, a potentially dangerous issue has been identified within certain 2024 models. The problem, rooted in the vehicle’s anti-lock brake system (ABS), could lead to unexpected activation of the ABS, causing a release of brake pressure that significantly diminishes braking performance. This defect poses an increased risk of accidents, particularly during specific low-speed braking events.

The problem first came to light in July 2024 when Honda, Acura’s parent company, was notified by General Motors (GM) about the issue. GM had received reports of two minor accidents, both allegedly linked to a sudden loss of braking, which were suspected to be caused by a software glitch in the ABS. In addition to these accidents, GM also reported a field complaint regarding the issue, though no accident had occurred in that instance.

Honda quickly launched an investigation into the matter. Upon closer examination, it was discovered that the issue was indeed related to a defect in the anti-lock brake system. Specifically, during certain braking events at speeds below 25 mph on dry surfaces, the ABS may activate with undue sensitivity. If this occurs and a specific sequence of wheel movements follows, the ABS will continue to release brake pressure in the service brake system. The result is a dramatic reduction in stopping performance, or in some cases, a complete failure of the brakes, greatly increasing the risk of a crash.

After confirming the defect, Honda determined that it posed a significant safety risk and initiated a safety recall. The company has emphasized that, as of now, no warranty claims, field reports, or incidents involving injuries or crashes related to this defect have been reported in Acura vehicles.

Affected vehicle owners will be notified of the recall and instructed to perform an iN VIN status inquiry to verify if their vehicle is eligible for the update. This notification is crucial for ensuring that all potentially affected vehicles, including those in new or used vehicle inventories, are addressed promptly.

To resolve this issue, Acura will be updating the electronic brake control module software. This update will be delivered either through an over-the-air (OTA) update or by visiting an Acura dealership. The update is designed to correct the sensitivity of the ABS, preventing the unexpected release of brake pressure and restoring normal braking function.

Acura has designated this recall with the internal number UJE, while the National Highway Traffic Safety Administration (NHTSA) has assigned it the campaign number 24VC-614.

Owners of the 2024 Acura ZDX All-Wheel Drive are urged to check whether their vehicle is affected by this recall. If you own one of these vehicles, it’s important to respond to the recall notice and ensure that the necessary software update is performed as soon as possible. This proactive step will help avoid the risks associated with the ABS defect and ensure your vehicle operates safely.

Cadillac Lyriq Defective Brake Performance

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A potential safety issue has been identified in certain 2023-2024 Cadillac Lyriq all-wheel-drive vehicles. This defect could affect the vehicle’s braking performance, posing a risk to drivers and passengers.

The investigation into this issue began in May 2024, when General Motors (GM) received reports of two minor accidents allegedly caused by a sudden loss of braking. Both incidents were suspected to be linked to a software problem within the vehicles’ Anti-lock Braking System (ABS). In addition to these accidents, GM was also alerted to a separate field complaint that, while not resulting in an accident, seemed potentially related to the same problem.

To get to the bottom of the issue, GM’s investigation team gathered and analyzed field data from various sources. Despite the initial reports, they found no additional cases that could be connected to this defect. However, through careful analysis, they determined that the problem could indeed occur, but only in extremely rare situations. Specifically, the issue arises when a false ABS event occurs on a dry road at speeds under 25 mph. During this event, if a particular series of wheel movements takes place, the ABS system might continue to release brake pressure in the vehicle’s service brake system, even when it shouldn’t.

Fortunately, GM has confirmed that no injuries or fatalities have been associated with this condition. However, given the potential risk, GM’s Safety Field Action Decision Authority (SFADA) decided in August 2024 to issue a safety recall for the affected vehicles.

The defect report explains that under certain rare braking conditions on dry surfaces at speeds below 25 mph, the ABS may become overly sensitive. If the ABS falsely activates and a specific sequence of wheel movements occurs, the system might continue to release brake pressure, which can significantly reduce the effectiveness of the service brakes. This could lead to a reduction in stopping performance or even cause the brakes to become inoperative, thereby increasing the risk of a crash.

To address this issue, GM has made an update to the electronic brake control module software. This update can be installed either through an over-the-air (OTA) update or by visiting a GM dealership. If you own one of the affected vehicles, GM urges you to take action as soon as possible. The recall number for this issue is N242453471, and the National Highway Traffic Safety Administration (NHTSA) campaign number is 24V-598.

RAV 4 SUV Squeaks And Brake Problems

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The Toyota RAV4 is known as a compact SUV renowned for its dependable performance, adaptability, and impressive fuel efficiency. While it has earned a commendable reputation overall, certain model years have seen reported issues, prompting owners to navigate through a spectrum of challenges.

Some common problems experienced by RAV4 owners include:

Brake problems emerge as a recurring concern among RAV4 drivers, including issues such as premature brake pad and rotor wear, disconcerting brake noises, and unsettling brake fluid leaks. These problems not only compromise safety but also demand timely intervention from skilled mechanics to conduct thorough inspections and execute requisite repairs. The intricate interplay of brake system components necessitates meticulous attention to detail to ensure optimal functionality.

Another issue encountered by RAV4 owners revolves around squeaking noises emanating from various areas of the vehicle. These auditory disturbances could originate from suspension bushings, brake pads, or even interior trim pieces, confounding both drivers and mechanics alike in their quest for pinpointing the exact source. Addressing squeaking noises entails a systematic diagnostic approach, coupled with the technical acumen to remedy underlying causes effectively.

Transmission issues represent a notable headache for certain RAV4 owners, manifesting in the form of erratic shifting patterns, disconcerting hesitation, or ominous slipping sensations. Tackling these transmission problems often entails a multifaceted approach, including fluid replenishment, software updates, and in more severe instances, complete transmission overhauls.

Electrical problems cast a shadow of uncertainty over RAV4 ownership experiences, as drivers contend with an electrical system susceptible to a myriad of maladies. From temperamental sensors to glitchy infotainment interfaces and vexing electrical shorts.

Certain RAV4 models have encountered engine-related issues, ranging from excessive oil consumption and rough idling to outright engine stalling. These afflictions, though relatively rare, underscore the imperative of adhering to stringent maintenance protocols and promptly addressing emerging issues to safeguard the longevity and performance of the vehicle’s powerplant.

Phantom Braking Issue In Certain 2023 Chevrolet Colorado and GMC Canyon Trucks

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2023 Chevrolet Colorado and GMC CanyonIn the realm of automotive safety, the emergence of advanced driver assistance systems (ADAS) has promised to revolutionize the driving experience, offering heightened levels of safety and convenience. However, as with any technological advancement, occasional glitches and malfunctions can arise, potentially jeopardizing the safety of drivers and passengers alike. Such is the case with the “phantom braking” issue that has plagued certain 2023 Chevrolet Colorado and GMC Canyon trucks.

The issue came to light in September 2023, when reports of unexpected automatic emergency braking (AEB) incidents surfaced in General Motors (GM) vehicles in China. GM initiated an investigation through its Speak Up For Safety (SUFS) program, aiming to identify the root cause of the problem and implement appropriate corrective measures.

Upon investigation, it was discovered that the faulty behavior stemmed from the Front Camera Module (FCM) system, a crucial component responsible for detecting obstacles and triggering AEB when necessary. Under certain conditions, the FCM’s software exhibited erroneous detection of obstacles, resulting in unwarranted activation of the AEB system. This phenomenon, referred to as “phantom braking,” poses a significant safety risk, potentially leading to accidents and injuries.

GM, in collaboration with its supplier, conducted rigorous testing and analysis to pinpoint the underlying cause of the malfunction. This involved examination of field data from various sources, including different versions of the FCM software, vehicles produced in different periods, and reports from both the U.S. and China.

A total of 234 field complaints in the U.S. were potentially linked to the phantom braking issue. Among these incidents, four resulted in accidents, with three causing minor injuries to occupants. GM’s Safety Field Action Decision Authority (SFADA) made the decision to initiate a safety recall in February 2024.

The recall, identified by GM as A232424660 and by the National Highway Traffic Safety Administration (NHTSA) as campaign number 24V-133, involves a corrective measure aimed at rectifying the software glitch in the FCM. Authorized dealerships will apply updates to the FCM software, effectively addressing the root cause of the phantom braking issue and restoring the intended functionality of the AEB system.

In conclusion, while the emergence of advanced driver assistance systems has undoubtedly enhanced automotive safety, incidents such as the phantom braking issue serve as a stark reminder of the importance of vigilance and proactive intervention. Through swift action and collaboration between manufacturers, suppliers, and regulatory agencies, the automotive industry can continue to push the boundaries of safety innovation, ensuring that drivers can enjoy the benefits of technology without compromising their well-being on the road.