Debris in Engine May Cause Stall – 2022-2023 Toyota Tundra & Lexus LX600

May 30, 2024 NHTSA CAMPAIGN NUMBER: 24V381000

Debris in Engine May Cause Stall

A loss of drive power increases the risk of a crash.

 

NHTSA Campaign Number: 24V381

Manufacturer ToyotaeBay logo Motor Engineering & Manufacturing

Components ENGINE AND ENGINE COOLING

Potential Number of Units Affected 102,092

 

Summary

ToyotaeBay logo Motor Engineering & Manufacturing (ToyotaeBay logo) is recalling certain 2022-2023 Tundra and Lexus LX600 vehicles equipped with a V35A engine. Debris from the manufacturing process may contaminate the engine and cause the main bearings to fail, which can result in an engine stall and loss of drive power.

 

Remedy

The remedy is currently under development. Interim letters notifying owners of the safety risk are expected to be mailed July 15, 2024. A second notice will be sent once the remedy is available. Owners may contact ToyotaeBay logo customer service at 1-800-331-4331. ToyotaeBay logo’s numbers for this recall are 24TB07/24TA07 and 24LB04/24LA04.

 

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

 

Check if your Vehicle has a Recall

 


SAFETY RECALL 24TA07

On May 30, 2024, ToyotaeBay logo filed a Defect Information Report (DIR) with the National Highway Traffic Safety Administration (NHTSA) informing the agency of our intent to conduct a voluntary Safety Recall on certain 2022-2023 model year Tundra vehicles.

 

Condition

There is a possibility that certain machining debris may not have been cleared from the engine when it was produced. In the involved vehicles, this can lead to potential engine knocking, engine rough running, engine no start and/or a loss of motive power. A loss of motive power while driving at higher speeds can increase the risk of a crash.

 

Remedy

ToyotaeBay logo is currently developing the remedy for this issue.

 

Covered Vehicles

There are approximately 98,600 vehicles covered by this Safety Recall. Approximately 900 vehicles involved in this Safety Recall were distributed to Puerto Rico.

 

Owner Letter Mailing Date

ToyotaeBay logo will notify owners by late July 2024.

ToyotaeBay logo makes significant effort to obtain current customer name and address information from each state through industry resources when mailing owner letters. In the event your dealership receives a notice for a vehicle that was sold prior to the Safety Recall announcement, it is the dealership’s responsibility to forward the owner letter to the customer who purchased the vehicle.

Please note that only owners of the covered vehicles will be notified. If you are contacted by an owner who has not yet received a notification, please verify eligibility by confirming through TIS prior to performing repairs. Dealers should perform the repair as outlined in the Technical Instructions found on TIS.

 


SAFETY RECALL 24LA04

On May 30, 2024, Lexus filed a Defect Information Report (DIR) with the National Highway Traffic Safety Administration (NHTSA) informing the agency of our intent to conduct a voluntary Safety Recall on certain 2022-2023 model year LX vehicles.

 

Condition

There is a possibility that certain machining debris may not have been cleared from the engine when it was produced. In the
involved vehicles, this can lead to potential engine knocking, engine rough running, engine no start and/or a loss of motive
power. A loss of motive power while driving at higher speeds can increase the risk of a crash.

 

Remedy

Lexus is currently developing the remedy for this issue.

 

Covered Vehicles

There are approximately 3,500 vehicles covered by this Safety Recall. Approximately 50 vehicles involved in this Safety Recall
were distributed to Puerto Rico.

 

Owner Letter Mailing Date

Lexus will notify guests by late July 2024.

Lexus makes significant effort to obtain current guest name and address information from each state through industry resources when mailing owner letters. In the event your dealership receives a notice for a vehicle that was sold prior to the Safety Re call announcement, it is the dealership’s responsibility to forward the owner letter to the guest who purchased the vehicle.

Please note that only guests of the covered vehicles will be notified. If you are contacted by a guest who has not yet received a notification, please verify eligibility by confirming through TIS prior to performing repairs . Dealers should perform the repair as outlined in the Technical Instructions found on TIS.

 


Description of Problem:

The subject vehicles are equipped with a specific V35A engine that contains crankshaft main bearings which allow the crankshaft to rotate within the engine assembly while running. During a specific production period, there is a possibility that engine machining debris of a particular size and amount may not have been cleared from the engine during manufacturing and subsequently contaminated the engine assembly during the production process. For these engines in the subject vehicles, the pressure on the main bearings due to the engine configuration is such that, if the aforementioned machining debris adheres to the bearings and operation of the engine continues at higher loads over time, failure of the bearings may occur. This can lead to potential engine knocking, engine rough running, engine no start and/or an engine stall. In the subject vehicles, an engine stall while driving leads to a loss of motive power. A vehicle loss of motive power while driving at higher speeds can increase the risk of a crash.

 

Chronology of Principal Events:

March 2022 – December 2022
In early March 2022, ToyotaeBay logo received a field report that indicated a vehicle equipped with a V35A engine stalled. ToyotaeBay logo recovered the involved parts and performed an investigation of the engine failure. Through this investigation, it was found that the crankshaft main bearings had seized.

In late July 2022, a ToyotaeBay logo field report and a dealer report were received that alleged the failure of two different V35A engines with damaged bearings. ToyotaeBay logo recovered the involved parts and performed an investigation of the engine failures. Through this investigation, it was found that the crankshaft main bearings had been damaged, but due to the nature of the failures, ToyotaeBay logo could not determine the cause of the damage. ToyotaeBay logo hypothesized that debris could be present from the engine machining process. To reduce the possibility of engine contamination during manufacturing, ToyotaeBay logo implemented cleanliness process changes at its engine manufacturing plants.

January 2023 – August 2023
After cleanliness process changes were implemented, ToyotaeBay logo continued to monitor the market for any increase in trend related to the issue. During this time, ToyotaeBay logo also recovered V35A parts alleged to contain engine contamination to confirm the adequacy of the manufacturing process changes.

September 2023 – January 2024
ToyotaeBay logo observed an increase in dealer and ToyotaeBay logo field reports related to engine failure involving debris.
In mid-October, ToyotaeBay logo began an investigation into the design validation process of the V35A engine and the installation validation process of the engine manufacturing equipment. It also continued to assess the effectiveness of manufacturing process changes implemented earlier.

ToyotaeBay logo also continued to recover V35A engines from the field. ToyotaeBay logo used these engines to inspect the oil filters and engine parts for debris. ToyotaeBay logo also used these engines to study the effect of debris in the engine over time.
As part of its investigation into the design validation process of the V35A engine, in November 2023, ToyotaeBay logo began analyzing the bearing durability studies that were performed during the development of the V35A engine.

In January 2024, the Alabama engine manufacturing plant was requested to provide all quality testing swatches used to capture debris samples at specified intervals dating back to the beginning of production of the V35A engine for analysis. These samples represented the size and amount of debris present for production periods, or lots, of engines.
In January 2024, ToyotaeBay logo presented the status of the ongoing investigation items to NHTSA.

February 2024 – May 2024
As a part of its investigation into recovered parts from V35A engines, in February 2024, ToyotaeBay logo began collecting and tearing down good engines recovered from the field. ToyotaeBay logo used these engines to analyze the oil for metal content and to perform an inspection of the oil passages. ToyotaeBay logo noted that certain recovered engines showed some levels of bearing degradation or damage but had not shown signs of failure. These bearings were sent to ToyotaeBay logo’s engine design teams in Japan for further analysis.

The bearing durability studies were completed in March 2024. From these studies, maximum operation stress during driving, stress limits of each bearing, and size of debris that each bearing was designed to withstand under normal loading were identified.

In early March 2024, ToyotaeBay logo began scanning the testing swatch samples which were collected from the Alabama engine manufacturing plant for further analysis.

In late March 2024, ToyotaeBay logo presented an update of the status of the ongoing investigation items to NHTSA.
In early May 2024, the analysis that was being performed on bearings recovered from good V35A engines was completed. The results showed that the damage that was seen on the bearings was from debris created during the engine machining process, and that there were sufficient debris sizes and amounts present to cause a bearing to fail.
ToyotaeBay logo also finished its scanning and analysis of testing swatch samples from the Alabama manufacturing plant. A statistical study was applied to the data to create probability models.

Based on the results of the above investigation, ToyotaeBay logo determined that during a specific production period, there is a possibility that engine machining debris of a particular size and amount may not have been cleared from the engine during manufacturing and subsequently contaminated the engine assembly during the production process. For these engines in the subject vehicles, if the aforementioned machining debris adheres to the bearings and operation of the engine continues at higher loads over time, failure of the bearings may occur. This can lead to potential engine knocking, engine rough running, engine no start and/or an engine stall. In the subject vehicles, an engine stall while driving leads to a loss of motive power. A vehicle loss of motive power while driving at higher speeds can increase the risk of a crash.

May 23, 2024
ToyotaeBay logo decided to conduct a voluntary safety recall campaign.

As of May 20, 2024, based on a diligent review of records, ToyotaeBay logo’s best engineering judgement is that there are 166 ToyotaeBay logo Field Technical Reports and 824 warranty claims on the engines in the subject vehicles that have been received from U.S. sources that relate or may relate to this condition and which were considered in the decision to submit this report.

 

Description of Corrective Repair Action:

All known owners of the subject vehicles will be informed that remedy is under investigation and that they will be contacted when further information is available.

 

Reimbursement Plan for pre-notification remedies

As the owner notification letters will be mailed out well within the active period of the ToyotaeBay logo or Lexus New Vehicle Limited Warranty (“Warranty”), all involved vehicle owners for this recall would have been provided a repair at no cost under ToyotaeBay logo’s Warranty. The owner letter will instruct vehicle owners who have paid to have this condition remedied prior to this campaign to seek reimbursement pursuant to ToyotaeBay logo’s General Reimbursement Plan.

 


4 Affected Products

Vehicles

MAKEMODELYEAR
LEXUSLX2022-2023
TOYOTAeBay logoTUNDRA2022-2023

 


5 Associated Documents

Recall 573 Report

RCLRPT-24V381-6004.PDF 216.448KB

 


Manufacturer Notices(to Dealers,etc) May 30, 2024 – 2022 – 2023 Model Year LX 600 Engine May Stall During Driving

RCMN-24V381-1577.pdf 707.691KB

 


Recall Acknowledgement

RCAK-24V381-9859.pdf 692.289KB

 


TOYOTAeBay logo May 30, 2024 DEFECT INFORMATION REPORT

RMISC-24V381-8150.pdf 130.753KB

 


Manufacturer Notices(to Dealers,etc) May 30, 2024 – 2022 – 2023 Model Year Tundra Engine May Stall During Driving

RCMN-24V381-3977.pdf 267.284KB

 


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