Tag Archives: electrical short

BMW and Toyota Supra Fire Risk

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BMW and Toyota have announced a voluntary safety recall affecting certain 2019–2022 BMW models and 2020–2022 Toyota Supra vehicles due to a potential fire risk involving the engine starter relay. The issue arises when water makes contact with the relay, which over time may corrode and compromise the electrical connection. While corrosion can make it difficult or impossible to start the engine, in more severe cases it can cause the relay to short-circuit and overheat. This overheating poses a significant fire hazard, as a thermal event could occur not only while the vehicle is being driven but also when it is parked with the ignition off.

BMW launched an engineering investigation in July 2024 after reports of thermal events in certain vehicles. Over the following year, engineers analyzed field cases, conducted parts tear-downs, and tested water ingress scenarios in an attempt to replicate the failure. Although no single cause was definitively confirmed, BMW identified production periods that may be at risk. On September 16, 2025, the automaker initiated a recall. Toyota conducted its own review of records and confirmed no U.S. reports of Supra incidents to date, but vehicles remain included in the recall as a precaution.

Owners of affected vehicles are strongly advised to park outdoors and away from buildings until repairs are complete. Dealers will address the issue by replacing the engine starter at no cost to customers. Interim recall notices will begin mailing on November 14, 2025, with a follow-up notice sent once replacement parts are available. The recall is listed under NHTSA Campaign Number 25V-636.

Affected Vehicles Include:

  • 2019–2021 BMW 330i
  • 2021–2022 BMW 430i
  • 2021–2022 BMW 430i Convertible
  • 2020–2022 BMW 530i
  • 2020–2022 BMW X3
  • 2020–2022 BMW X4
  • 2019–2022 BMW Z4

If you own one of these vehicles, stay alert for recall notifications, and in the meantime, take the precaution of parking your vehicle outside until the remedy is performed.

Electrical Issues Affecting 2024 Ford Explorer and Bronco Sport Models

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battery problemsFord Motor Company has announced two significant recalls affecting its 2024 Explorer and Bronco Sport vehicles. Both recalls involve electrical issues that could potentially lead to serious problems for vehicle owners. Here’s what you need to know about each recall:

2024 Ford Explorer Recall (NHTSA Campaign Number: 24V-685)

Ford is recalling certain 2024 Explorer models equipped with 3.3L Hybrid engines. The issue stems from the 12-volt battery cable, which may chafe against the Belt-integrated Starter Generator (BiSG). If this occurs, it could lead to a short circuit.

This kind of electrical short can cause the vehicle to lose power, increasing the risk of a crash. In some cases, the short circuit could also result in a fire hazard. Ford is taking action to notify owners and replace or repair affected parts to ensure safety.

Key Concerns:

  • Affected Vehicles: 2024 Ford Explorers with 3.3L Hybrid engines
  • Problem: 12-volt battery cable could chafe against the BiSG, leading to a short circuit
  • Risks: Potential loss of power and fire hazard

2024 Ford Bronco Sport Recall (NHTSA Campaign Number: 24V-683)

The second recall involves certain 2024 Ford Bronco Sport vehicles. In these models, the body and powertrain control modules may fail to detect changes in the state of charge of the 12-volt battery. This issue can lead to incorrect readings and could affect the vehicle’s performance.

If the control modules fail to detect the battery’s actual charge, the vehicle may stall unexpectedly, which could increase the risk of an accident. Ford plans to update the control module software to fix the issue.

Key Concerns:

  • Affected Vehicles: 2024 Ford Bronco Sport
  • Problem: Control modules may not detect changes in the battery’s state of charge
  • Risks: Vehicle stalling unexpectedly, raising the likelihood of accidents

Ford will notify owners of the affected vehicles and instruct them to take their cars to authorized dealers for inspection and repair. The repairs, include replacing cables or updating control module software.

If you own a 2024 Ford Explorer Hybrid or Bronco Sport, it’s important to stay alert for communication from Ford about these recalls. In the meantime, you can also contact Ford’s customer service or visit the National Highway Traffic Safety Administration (NHTSA) website to check if your vehicle is part of the recall. By addressing these issues promptly, Ford aims to prevent potential accidents and ensure the continued safety of their customers.

Hyundai Kona Potential Engine Compartment Fire From Short Circuit

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Hyundai Motor America (Hyundai) is initiating a recall for certain 2024 Kona models due to a potential risk of electrical short circuiting. This issue arises from the possibility of the battery cables rubbing against the engine control module bracket.

These vehicles are equipped with a 12-volt positive battery cable that could suffer damage during frontal collisions, leading to contact with the engine control module (ECM) bracket. This contact increases the likelihood of an electrical short, which could result in a fire in the engine compartment post-collision. Signs of this problem include smoke or a burning smell emanating from the engine area.

The issue first came to Hyundai’s attention in November 2023, following a report by the Insurance Institute for Highway Safety (IIHS) about an engine compartment fire in a 2024 Hyundai Kona 1.6T-GDI AWD during a crash test. The IIHS observed smoke and flames emerging from the engine area shortly after the test. Their preliminary assessment indicated a short circuit in the ECM, which led to repeated reignitions. The situation was resolved after disconnecting the auxiliary battery. This incident prompted NASO to launch a new investigation.

A joint examination by NASO, HMC, HATCI, and IIHS revealed damage to the alternator and 12-volt positive power wiring beneath the ECM, with exposed copper cores. The ECM bracket was found pressing against the 12-volt positive battery cable, believed to have shifted during the crash and caused the electrical short leading to the fires.

In response, Hyundai conducted crash tests in December with newly designed sheathing to protect the 12-volt positive wiring from shorting due to ECM bracket contact. These tests were successful, showing no damage or electrical shorting. Consequently, HMA’s NASO decided to recall the affected Kona vehicles.

To date, there have been no reported crashes, injuries, or deaths related to this issue, except for the single fire incident during the IIHS test. Hyundai is unaware of any field incidents. Vehicle owners will be notified to return their vehicles to Hyundai dealers for the installation of protective sheathing over the wiring. The recall is designated as number 252, with NHTSA campaign number 23V-900.

OCS Sensors May Short Circuit In Lexus And Toyota Vehicles

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Toyota Motor Engineering & Manufacturing (Toyota) has announced a significant recall affecting a range of Lexus and Toyota vehicles from the 2020 to 2022 model years. This recall, necessitated by a defect in the Occupant Classification System (OCS) sensor, underscores a critical safety issue that could potentially prevent the deployment of the front passenger airbag.

The recall spans a variety of models, including:

  • Lexus ES (2020-2021)
  • Lexus ES Hybrid (2020-2022)
  • Lexus RX and RX Hybrid (2020-2021)
  • Toyota Avalon and Avalon Hybrid (2020-2021)
  • Toyota Camry and Camry Hybrid (2020-2022)
  • Toyota Corolla, Highlander, and their Hybrid variants (2020-2021)
  • Toyota RAV4 and RAV4 Hybrid (2020-2021)
  • Toyota Sienna Hybrid (2021)

The issue originates from the Occupant Classification System sensors located in the front passenger seat. These sensors play a pivotal role in the Supplemental Restraint System (SRS), determining the deployment of the front passenger airbag based on the occupant load. A defect has been identified wherein, during production, the sensor’s Printed Circuit Board (PCB) became deformed. This deformation can cause a crack in a capacitor, leading to moisture intrusion over time and resulting in a short circuit.

The malfunctioning of these sensors poses a significant risk. In the event of a short circuit, the SRS warning lamp and the “Passenger Airbag OFF” lamp will illuminate, accompanied by a message on the Multi-Information Display (MID). The most concerning consequence is that the front passenger airbag may not deploy in certain crashes, markedly increasing the risk of injury to the occupant.

To address this issue, Toyota dealers will conduct inspections and replace the sensor where necessary. The recall is comprehensive in its scope, and owner notification letters are expected to be dispatched starting February 4, 2024.

Toyota has assigned the numbers 23TB15/23TA15 for Toyota and 23LB03/23LA03 for Lexus vehicles to this recall. Additionally, the National Highway Traffic Safety Administration (NHTSA) has registered this recall under campaign number 23V-865.

This recall by Toyota highlights the intricate nature of modern automotive safety systems and the critical importance of their proper functioning. Owners of the affected vehicles are urged to heed the recall notice and have their vehicles inspected and repaired as necessary to ensure their safety and that of their passengers.

Honda’s CR-V Hybrid Battery Cable Safety Issue

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Honda has announced a safety recall for certain 2020-2022 CR-V Hybrid vehicles due to a critical issue concerning the 12-Volt battery cable. This recall comes after a detailed investigation into the safety of these vehicles, revealing a potential risk that could increase during specific types of crashes.

The identified problem lies in the routing of the 12-Volt battery cable, which is situated outside of the body frame and lacks a fuse on the power circuit. This design flaw could lead to the battery cable short-circuiting or overheating, particularly in the event of a crash impacting the left front fender area. Such a scenario raises significant concerns about the possibility of a fire and the risk of injury to the occupants.

Chronology of Events Leading to the Recall

  • May 17, 2021: The first known incident occurs, where a crash led to a short circuit in the battery cables located in the left front fender.
  • May 19, 2021: Honda receives a report from the National Highway Traffic Safety Administration (NHTSA) about this incident.
  • May 28, 2021: Honda collaborates with the NHTSA to inspect the affected vehicle and analyze the issue.
  • August 18, 2021: After discussing the first incident with NHTSA, Honda initially concludes that there are no high-voltage related issues or similar complaints.
  • September 16, 2021: Honda conducts further tests to analyze the issue.
  • October 21, 2021: Honda’s evaluation suggests that the crash angle in the first incident was a rare occurrence.
  • June 13, 2022: Honda starts implementing a fuse in production models to address this potential issue.
  • August 18, 2022: A second incident under similar circumstances prompts another analysis by Honda.
  • August 29, 2023: Honda receives a warranty claim possibly related to the same issue.
  • October 30, 2023: Honda reassesses its stance on the rarity of such occurrences and the likelihood of future incidents.
  • December 6, 2023: Honda acknowledges a defect related to vehicle safety and decides to initiate a recall.

The Recall Process

Honda, adhering to its commitment to safety and customer satisfaction, has decided to recall the affected vehicles. Registered owners will be notified via mail to bring their vehicles to an authorized Honda dealer. Here, the battery cable will be replaced with an improved part that addresses the identified safety concern. Honda’s internal number for this recall is FGB, and the NHTSA campaign number is 23V-844.

Safety and Customer Support

From August 2019 through December 6, 2023, Honda has recorded two warranty claims related to this issue, with no reports of injuries or fatalities. This proactive recall demonstrates Honda’s dedication to the safety of its customers and its responsiveness to potential safety issues. Vehicle owners are encouraged to respond promptly to the recall notice to ensure their safety and the continued reliability of their vehicles.

Ford Fusion PHEV Battery Problem
Risk Of Stall Or Fire

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Ford Fusion with smoke from trunk

Certain Ford Fusion PHEV vehicles may experience damage to their Battery Energy Control Module (BECM) due to excessive voltage and current flow. This issue can lead to a loss of motive power and pose safety risks such as the possibility of a crash or a localized fire around the BECM. Ford is currently working on a fix for this safety issue.

Problem was first discovered in July 2022, when Ford’s Trend and Early Warning Support (TEWS) team alerted the Critical Concern Review Group (CCRG) about five fire reports involving 2019 Fusion PHEV vehicles equipped with 30Ah high voltage batteries. These fires occurred while the vehicles were at dealerships during a replacement BECM service to address various issues like voltage sense Diagnostic Trouble Codes (DTCs), check engine light, no start, or loss of motive power concerns. Ford’s High Voltage Battery Systems Team conducted an analysis and determined that the fires originated from the BECM. Further examination by the supplier revealed that the Current Interrupt Device (CID) had been activated in the high voltage battery cells of the affected units, though the reason behind this activation remains unknown. Due to the rate and severity of the concern, Ford’s CCRG initiated an investigation.

In February 2023, Ford published a Technical Service Bulletin (TSB) that advises replacing the high voltage battery if vehicles come in for service with one or more voltage sense DTCs, instead of just replacing the BECM. This measure aims to address the underlying issue and prevent further damage.

While a permanent remedy is under development, Ford urges owners not to charge their vehicles until the remedy is implemented. To ensure owners are aware of the safety risk, interim letters have been sent to them as of July 14, 2023. Second letters will follow once the remedy becomes available. This recall is identified as 23S33 by Ford, and the NHTSA campaign number is 23V-440.

Toyota and Lexus Airbag Problem

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AirbagToyota and Lexus have announced that they will be reaching out to owners of specific vehicle models due to a critical problem related to the electrical connection inside the steering column. This issue has the potential to disable the driver’s side airbag, leading to non-compliance with Federal Motor Vehicle Safety Standards for Occupant Crash Protection.

The problem first came to Toyota’s attention in May 2023 when they were contacted by the spiral cable assembly supplier. The supplier informed Toyota about an ongoing investigation into the manufacturing process, which revealed contamination in the washing station for specific spiral cable components. As a consequence, a poor welding condition could occur between the Flexible Flat Cable (FFC) and the bus bar, which affects connectivity to various controls on the steering wheel. Extensive testing conducted by the supplier between late-May and late-June indicated that the FFC might detach from the bus bar at the weak weld connection area.

As per the defect report, the steering column assembly in the affected vehicles contains electrical connections to the driver’s airbag module housed within a spiral cable assembly, including the FFC. In cases where the FFC is inadequately welded to the spiral cable’s bus bar, there is a risk of the FFC separating, resulting in one or more open circuits linked through the FFC. This separation specifically impacts the circuit responsible for connecting the driver’s airbag module. If connectivity is lost, the SRS warning light will activate, and the driver’s airbag may be deactivated, failing to deploy in a crash scenario that necessitates its activation. Consequently, this raises the likelihood of driver injury in the event of a crash.

 

The vehicles affected include:

2023-2024 Lexus NX Hybrid
2023-2024 Lexus NX250
2023-2024 Lexus NX350
2023 Lexus RX Hybrid
2023 Lexus RX350
2023 Lexus RX500H
2023 Toyota Corolla
2023 Toyota Corolla Cross
2023 Toyota Corolla Cross Hybrid
2023 Toyota Highlander
2023 Toyota Highlander Hybrid
2023 Toyota Tacoma

Dealers will inspect and replace the spiral cable assembly as necessary. Toyota’s number for this recall is 23TA08, Lexus’ number for this recall is 23LA02 and the NHTSA campaign number is 23V-480.

Ford F-150 BEV Tail Lights Flicker

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Ford will be contacting the owners of certain 2022-2023 Ford F-150 Battery Electric Vehicles (BEVs) due to a problem that may cause inoperative or flickering back-up lights. This issue came to the attention of Ford’s Critical Concern Review Group (CCRG) in March 2023, following reports of moisture in the rear light bar of select F-150 BEV Platinum and Lariat vehicles from the 2022 and 2023 model years. These vehicles feature a rear light bar that spans the tailgate and houses the supplemental tail lamp and reverse lamp functions. Upon further investigation, Ford discovered an increased rate of warranty reports citing moisture in the rear light bar, which consequently resulted in certain claims of malfunctioning or flickering rear supplemental tail lamps and reverse lamps.

Upon examining the returned parts, Ford observed the presence of water droplets or condensation within the lamp, indicating micro cracks in the outer lens of the light bar. Testing conducted on the parts retrieved from the field revealed that over half of them had either inoperative or flickering supplemental tail lamps and/or reverse lamps. The investigation by the CCRG pinpointed the cause of stress on the light bar to be static and dynamic loading during the assembly plant fit process, which involves aligning the tailgate and surrounding components. Additionally, extreme tailgate surface loading in temperatures below -40 Celsius was also identified as a factor. The forces exerted on the light bar and its housing result in stress being transferred to the lens, potentially leading to the development of micro cracks.

To address this issue, owners who receive notices will be required to visit their dealerships to have the rear light bar replaced. Ford has assigned the recall number 23S30 to this specific recall, while the NHTSA campaign number is 23V-418.

In situations where vehicle owners encounter persistent issues with their newly purchased vehicles, such as the problems described above, they may be protected by lemon laws. Lemon laws vary by jurisdiction but are generally designed to provide legal recourse to consumers who unknowingly purchase vehicles with substantial defects that affect their safety, value, or use. These laws typically require manufacturers to either replace the defective vehicle or refund the purchase price if the vehicle cannot be adequately repaired within a reasonable number of attempts. If you suspect that your vehicle is a lemon, it is advisable to familiarize yourself with the lemon law provisions in your jurisdiction and consult with a legal professional to understand your rights and options for resolution.