Preliminary Evaluation · Closed

Alternator Front Bearing Failure

Action number

PE21011

Opened

May 13, 2021

Closed

Oct 3, 2022

Outcome

Recall 22V222

Manufacturer: Volvo Bus Corporation

This investigation led to a recall

NHTSA links this probe to recall campaign 22V222.

Campaign 22V222 predates our recall archive — check NHTSA.gov for details.

What NHTSA is examining

NHTSA's Office of Defects Investigation (ODI) opened a Preliminary Evaluation after reviewing field reports 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.Analysis of the data provided by Prevost Car (US) Inc. showed high failure frequency and thermal events. An immediate shutdown of the bus can increase the risk of a crash or injury of bus occupants. In response to this investigation, Prevost Car (US) Inc. and Volvo Bus Corporation decided to conduct recalls 22V-221 and 22V-222. By submitting Part 573 Defect Information Reports on April 6, 2022, Prevost Car (US) Inc. and Volvo Bus Corporation notified ODI of a safety defect in certain model year (MY) 2010-2023 Prevost H3-45; X3-45; X3-45 Com; H3-45 VIP: X3-45 VIP and 2020 Volvo 9700 vehicles; some of these buses may have experienced thermal events after failure of the alternator front bearing, because the alternator belt continues to turn the alternator after the bearing failure.These recall actions address the safety concern that led to the opening of this investigation.Therefore, with these recall actions, this investigation is closed. The recalls encompass all model and MY vehicles addressed by the investigation. However, the closing of this investigation does not constitute a finding by NHTSA that a safety-related defect does not…

Vehicles under investigation

2010 Prevost H3-402011 Prevost H3-402012 Prevost H3-402013 Prevost H3-402010 Prevost H3-412011 Prevost H3-412012 Prevost H3-412013 Prevost H3-412014 Prevost H3-412015 Prevost H3-412016 Prevost H3-412017 Prevost H3-412018 Prevost H3-412019 Prevost H3-412021 Prevost H3-412022 Prevost H3-412010 Prevost H3-45 Vip2011 Prevost H3-45 Vip2012 Prevost H3-45 Vip2013 Prevost H3-45 Vip2014 Prevost H3-45 Vip2015 Prevost H3-45 Vip2016 Prevost H3-45 Vip2017 Prevost H3-45 Vip2018 Prevost H3-45 Vip2019 Prevost H3-45 Vip2020 Prevost H3-45 Vip2021 Prevost H3-45 Vip2022 Prevost H3-45 Vip2023 Prevost H3-45 Vip2010 Prevost H3-452011 Prevost H3-452012 Prevost H3-452013 Prevost H3-452014 Prevost H3-452015 Prevost H3-452016 Prevost H3-452017 Prevost H3-452018 Prevost H3-452019 Prevost H3-452020 Prevost H3-452021 Prevost H3-452022 Prevost H3-452023 Prevost H3-452010 Prevost H3 Vip2010 Prevost H3-Vip2011 Prevost H3-Vip2012 Prevost H3-Vip2013 Prevost H3-Vip2014 Prevost H3-Vip2015 Prevost H3-Vip2016 Prevost H3-Vip2017 Prevost H3-Vip2018 Prevost H3-Vip2019 Prevost H3-Vip2010 Prevost H32011 Prevost H32012 Prevost H32013 Prevost H32019 Prevost H32020 Prevost H32011 Prevost X3-45 Coach2012 Prevost X3-45 Coach2013 Prevost X3-45 Coach2014 Prevost X3-45 Coach2015 Prevost X3-45 Coach2016 Prevost X3-45 Coach2010 Prevost X3-45 Commuter2011 Prevost X3-45 Commuter2012 Prevost X3-45 Commuter2013 Prevost X3-45 Commuter2014 Prevost X3-45 Commuter2015 Prevost X3-45 Commuter2016 Prevost X3-45 Commuter2017 Prevost X3-45 Commuter2018 Prevost X3-45 Commuter2019 Prevost X3-45 Commuter2020 Prevost X3-45 Commuter2021 Prevost X3-45 Commuter2022 Prevost X3-45 Commuter2023 Prevost X3-45 Commuter2013 Prevost X3-45 LE Mirage Coach2010 Prevost X3-45 Vip Entertainer2011 Prevost X3-45 Vip Entertainer2012 Prevost X3-45 Vip Entertainer2013 Prevost X3-45 Vip Entertainer2014 Prevost X3-45 Vip Entertainer2015 Prevost X3-45 Vip Entertainer2016 Prevost X3-45 Vip Entertainer2017 Prevost X3-45 Vip Entertainer2018 Prevost X3-45 Vip Entertainer2010 Prevost X3-45 Vip2011 Prevost X3-45 Vip2012 Prevost X3-45 Vip2013 Prevost X3-45 Vip2014 Prevost X3-45 Vip2015 Prevost X3-45 Vip2016 Prevost X3-45 Vip2017 Prevost X3-45 Vip2018 Prevost X3-45 Vip2019 Prevost X3-45 Vip2020 Prevost X3-45 Vip2021 Prevost X3-45 Vip2022 Prevost X3-45 Vip2023 Prevost X3-45 Vip2010 Prevost X3-452011 Prevost X3-452012 Prevost X3-452013 Prevost X3-452014 Prevost X3-452015 Prevost X3-452016 Prevost X3-452017 Prevost X3-452018 Prevost X3-452019 Prevost X3-452020 Prevost X3-452021 Prevost X3-452022 Prevost X3-452023 Prevost X3-452020 Prevost X3 Coach2021 Prevost X3 Coach2022 Prevost X3 Coach2020 Prevost X3 Com2021 Prevost X3 Com2022 Prevost X3 Com2018 Prevost X3 Commuter2019 Prevost X3 Commuter2012 Prevost X3-Vip2013 Prevost X3-Vip2014 Prevost X3-Vip2015 Prevost X3-Vip2016 Prevost X3-Vip2010 Prevost X32011 Prevost X32012 Prevost X32013 Prevost X32014 Prevost X32015 Prevost X32016 Prevost X32017 Prevost X32018 Prevost X32019 Prevost X32020 Prevost X32014 Prevost X3VIP2015 Prevost X3VIP2016 Prevost X3VIP2017 Prevost X3VIP2018 Prevost X3VIP2019 Prevost X3VIP2020 Volvo Bus 9700

Source: NHTSA Office of Defects Investigation records, updated daily. An investigation is not a determination that a defect exists; many probes close without a recall.