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June 7, 2024 NHTSA CAMPAIGN NUMBER: 24V421000
Engine Shutdown from Loose Ground Connection
An unexpected engine shutdown increases the risk of a crash. An overheated ground connection can increase the risk of a fire.
NHTSA Campaign Number: 24V421
Manufacturer Nova Bus (US) Inc.
Components ELECTRICAL SYSTEM
Potential Number of Units Affected 45
Summary
Nova Bus (US) Inc. (Nova Bus) is recalling certain 2022-2023 LFS buses. The ground connection on the bus bar in the HVAC roof unit may not be secured properly, which can result in an unexpected engine shutdown or an overheated ground connection.
Remedy
Nova Bus will inspect and tighten the ground connection on the bus bar, free of charge. Owner notification letters are expected to be mailed August 8, 2024. Owners may contact Nova Bus customer service at 1-800-350-6682. Nova Bus’s number for this recall is CR5605.
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 :
April 14, 2023: Nova Bus service representative was informed of the issue.
May 15, 2023: Nova Bus started an internal investigation.
May 29, 2023: The issue was raised to the Product Safety Evaluation Committee as a potential risk for evaluation.
June 16, 2023: Nova Bus opens a formal potential safety related issue investigation.
June 19, 2023: Survey was launched by roof unit supplier to help identify potential affected market.
March 9, 2024: Supplier completed the survey.
May 23, 2024: Product Safety Evaluation Committee evaluates and raises to Product Safety Committee.
June 4, 2024: Product Safety Committee determination of product defect.
June 7, 2024: Nova Bus files 573 with NHTSA that a voluntary recall will be released to address the safetyrelated defect.
There have been no accidents or injuries related to this defect. There have been no warranty claim related to this defect.
2 Affected Products
Vehicle
MAKE | MODEL | YEAR |
NOVA BUS | LFS | 2022-2023 |
2 Associated Documents
Recall 573 Report
RCLRPT-24V421-9193.PDF 215.646KB
Recall Acknowledgement
RCAK-24V421-8124.pdf 645.371KB
Latest Recalls Documents
https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=24V421&docType=RCL
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SEOCONTENT-START
OMB Control No.: 2127-0004
Part 573 Safety Recall Report 24V-421
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Nova Bus (US) Inc. JUN 07, 2024 NHTSA Recall No. : 24V-421 Manufacturer Recall No. : CR5605 Manufacturer Information :
Manufacturer Name : Nova Bus (US) Inc. Address : 260 Banker Road
PLATTSBURGH NY 12901
Company phone : 450-472-6410
Population :
Number of potentially involved : 45 Estimated percentage with defect : 100 %
Vehicle Information : Vehicle 1 : 2022-2023 Nova Bus LFS
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : The recall population is defined by vehicles built from 01/09/2023 through 03/22/2023, equipped with BCC roof units manufactured between August 2022 and July 2023. There are 45 Nova LFS vehicles MY 2022 through 2023 impacted.
Production Dates : JAN 09, 2023 – MAR 22, 2023 VIN Range 1 : Begin : 4RKYL82J5N9778661 End : 4RKYL82J4P9778752 ✔ Not sequential Description of Defect :
Description of the Defect : Vehicles may have been built with improper torque applied to a ground connection on a bus bar inside the HVAC roof unit. This could lead to a loose ground connection.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : A loose connection could lead to a corruption of the vehicle communication network, causing the engine to stall. An unexpected engine shutdown can increase the risk of a crash. In addition, a loose ground connection may increase the risk of a thermal event.
Description of the Cause : Improper torque applied to ground bus bar connection inside the HVAC roof unit. Identification of Any Warning
that can Occur : There is no warning prior to occurrence.
Involved Components : Part 573 Safety Recall Report 24V-421 Page 2 Component Name 1 : Roof Unit
Component Description : Roof Unit ECO353 40FT Component Part Number : N91985-02 Supplier Identification : Component Manufacturer
Name : Bus Climate Control Corp.
Address : 400 South Salem Church Road York Pennsylvania 17408
Country : United States Chronology :
April 14, 2023: Nova Bus service representative was informed of the issue. May 15, 2023: Nova Bus started an internal investigation.
May 29, 2023: The issue was raised to the Product Safety Evaluation Committee as a potential risk for evaluation.
June 16, 2023: Nova Bus opens a formal potential safety related issue investigation.
June 19, 2023: Survey was launched by roof unit supplier to help identify potential affected market. March 9, 2024: Supplier completed the survey.
May 23, 2024: Product Safety Evaluation Committee evaluates and raises to Product Safety Committee. June 4, 2024: Product Safety Committee determination of product defect.
June 7, 2024: Nova Bus files 573 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 no warranty claim related to this defect. Description of Remedy :
Description of Remedy Program : Vehicles will be recalled and the remedy program will be to inspect
vehicles and reapply correct torque on the bus bar connection. All costs associated with this corrective measure will be covered by Nova Bus. Pre- notification remedies will be addressed using the Nova Bus general reimbursement plan on file with NHTSA. How Remedy Component Differs from Recalled Component : Remedied component will have correct torque applied and torque seal will be visible on the connection. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 24V-421
Page 3
The information contained in this report was submitted pursuant to 49 CFR §573
Identify How/When Recall Condition was Corrected in Production :
A corrective action as part of the supplier’s post delivery inspection was put in place by the supplier on April 1st, 2023 Recall Schedule :
Description of Recall Schedule : Note: Nova Bus does not have a dealer network and the dates entered for
the planned dealer notification begin/end date are only to avoid NHTSA Recall Portal error while submitting the recall report. Owner notification will begin on or before August 08, 2024 Planned Dealer Notification Date : JUN 10, 2024 – JUN 10, 2024
Planned Owner Notification Date : AUG 08, 2024 – AUG 08, 2024
* NR – Not Reported
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