Alternator Belt May Overheat Seized Bearing – 2020 Volvo 9700

April 6, 2022 NHTSA CAMPAIGN NUMBER: 22V222000

Alternator Belt May Overheat Seized Bearing

An overheated alternator bearing can increase the risk of a fire.


NHTSA Campaign Number: 22V222000

Manufacturer Volvo Bus Corporation


Potential Number of Units Affected 47



Volvo Bus Corporation (Volvo Bus) is recalling certain 2020 Volvo 9700 DOT vehicles. In the event of the alternator front bearing seizing, the alternator belt may continue to operate, causing the bearing to overheat.



Volvo Bus will replace the alternator belt, free of charge. Owner notification letters September 30, 2022. Owners may contact Volvo Bus customer service at 1-866-870-2046.



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



10-21 -2022



On vehicles affected by this recall, the heavy duty alternator belt (with aramid cord reinforcement) may continue to turn the alternator pulley after an alternator bearing failure. If the pulley continues to turn, it could lead to front bearing overheat.

Therefore, the heavy duty aramid belt must be replaced by a polyester belt as needed following the interchange table provided.

Before reinstalling the polyester belt, the alternators front bearing must be inspected for damage and the alternator(s) replaced as needed.

Please take note that only the vehicles equipped with a Remy 55S 250 amp alternators are affected by this bulletin.



Chronology :

-2022-03-15 Prevost initiate an internal inquiry to analyse root cause of thermal event related to alternator front bearing. A link between the introduction of new belts and an increase of thermal events related to alternator’ front bearing failure was identified. This new case would be presented to Volvo Product Safety Committee (PSC)

-2022-03-30 Case presented to PSC. PSC decided there is a safety related defect and a recall is required. As some Volvo 9700 vehicles use the same type of belt, it was decided to include this vehicles on the recall

-2022-03-31 Preliminary discussion with NHTSA to expose the findings

-2022-04-06 Prevost submitted the vehicle defect report to NHTSA


1 Affected Product


VOLVO BUS 9700 2020


11 Associated Documents

Recall Acknowledgement

RCAK-22V222-6536.pdf 645.407KB



Defect Notice 573 Report

RCLRPT-22V222-6814.PDF 213.821KB



Recall 573 Report-Amendment 1-04/12/2022

RCLRPT-22V222-9414.PDF 213.982KB



Recall 573 Report-Amendment 2 – 05/26/2022

RCLRPT-22V222-6753.PDF 213.983KB



ISSUED Interim Owner Notification Letter(Part 577)

RIONL-22V222-1177.pdf 192.9KB



Safety Bulletin

RCSB-22V222-4072.pdf 578.97KB



ISSUED Owner Notification Letter(Part 577)

RCONL-22V222-4625.pdf 220.197KB



Safety Bulletin

RCSB-22V222-0027.pdf 1009.206KB



Recall Quarterly Report #1, 2022-3

RCLQRT-22V222-5709.PDF 211.123KB



ISSUED Owner Notification Letter(Part 577)

RCONL-22V222-9560.pdf 265.1KB



Recall Quarterly Report #2, 2022-4

RCLQRT-22V222-4681.PDF 211.236KB



Latest Recalls Documents

For the Latest and Most Recent Recalls Information Visit the link below…


1 Associated Investigation

Alternator Front Bearing Failure
Dated opened: May 13, 2021

NHTSA’s Office of Defects Investigation (ODI) is opening a Preliminary Evaluation after receiving a tip from a fleet safety manager concerning alternator front bearing failures that cause elevated temperatures within the engine compartment, resulting in the fire suppression system (FSS) activating, immediately shutting the engine down, and rendering the bus inoperable.

Review of Early Warning Reporting Data identified 9 field reports for Model Year (MY)2015 through MY2019 H3 and X3 Prevost buses, describing alternator failures in any of 3 alternators equipped on the bus. In some cases, a minor fire occurred damaging nearby electrical harnesses.

An immediate shut down of the bus can increase the risk of a crash or injury of passengers when transferring to another bus.

ODI is opening this investigation to evaluate the cause, consequence, scope and frequency of the alleged defect in the subject Prevost buses.


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Last update on 2023-11-21 / Affiliate links / Images from Amazon Product Advertising API

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