CR5577 – Engine Coolant Return Hose May Fail – 2020-2024 Nova Bus LFS

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March 27, 2024 NHTSA CAMPAIGN NUMBER: 24V231000

Engine Coolant Return Hose May Fail

An unexpected engine shutdown can increase the risk of a crash. Additionally, transferring passengers from the disabled bus can increase the risk of injury.

 

NHTSA Campaign Number: 24V231

Manufacturer Nova Bus (US) Inc.

Components ENGINE AND ENGINE COOLING

Potential Number of Units Affected 641

 

Summary

Nova Bus (US) Inc. (Nova Bus) is recalling certain 2020-2024 LFS vehicles. The engine coolant return hose may fail, leaking coolant and causing an engine shutdown.

 

Remedy

Nova Bus will replace the engine coolant return hose, free of charge. Owner notification letters are expected to be mailed May 26, 2024. Owners may contact Nova Bus customer service at 1-800-350-6682. Nova Bus number for this recall is CR5577.

 

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.

 


Chronology :

2023-02-28: Nova Bus was informed of Engine Coolant Return Hose failures.

2023-07-24: An internal investigation and problem resolution process was initiated.

2023-12-22: A Technical Service Bulletin (BS5511) was released to replace the Engine Coolant Return Hose with an updated version of the Engine Coolant Return Hose.

2024-02-14: In preparation for a review of the Technical Service Bulletin with NHTSA, the details of the investigation were reviewed and further information gathered to understand the potential vehicle behavior for loss of engine coolant.

2024-03-07: Product Safety Evaluation Committee raises the investigation to PSRI status and additional field information is reviewed.

2024-03-14: Product Safety Evaluation Committee evaluates the investigation findings and raises to the Product Safety Committee.

2024-03-20: Product Safety Committee reviews the information provided and requests additional information.

2024-03-22: Product Safety Committee makes the determination of a product safety defect.

2024-03-27: Nova Bus files DIR with NHTSA that a voluntary recall will be released to address the safety-related defect.

There have been no accidents or injuries related to this defect. There have been 236 warranty claims where the Engine Coolant Hose was replaced. The warranty claims were received as follow: April 2023: 1, June 2023: 3, July 2023: 5, August 2023: 9, September 2023: 1, October 2023: 44, November 2023: 24, December 2023: 77, January 2024: 49, February 2024: 21, March 2024: 2. Total of 236 claims.

 


5 Affected Products

Vehicle

MAKE MODEL YEAR
NOVA BUS LFS 2020-2024

 


2 Associated Documents

Defect Notice 573 Report

RCLRPT-24V231-4331.PDF 215.99KB

 


Recall Acknowledgement

RCAK-24V231-8358.pdf 645.365KB

 


Latest Recalls Documents

For the Latest and Most recent Recall Information Visit the link below…

https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=24V231&docType=RCL

 


 

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Last update on 2024-03-23 / Affiliate links / Images from Amazon Product Advertising API

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