Navistar 2017-2021 School Buses: Fire Risk from Fuel Heater
Navistar is recalling certain 2017-2021 school buses with Cummins diesel engines due to a fire risk from overheating fuel heaters. Owners must contact Cummins for free repairs to prevent potential fires and engine stalls.
Use caution until it’s fixed
A fire increases the risk of injury. An engine stall can increase the risk of a crash.
Contact the company
What happened, in plain English
Navistar is recalling 2017-2021 school buses with specific Cummins diesel engines that have a risk of fire from overheating fuel heaters. This could lead to engine stalls and crashes, so owners should get repairs to prevent injuries. Read more at govinfonow.com/recall/79672-navistar-2017-2021-school-buses-fire-risk-from-fuel-heater.
Source Summary by GovInfoNow · govinfonow.com/recall/79672-navistar-2017-2021-school-buses-fire-risk-from-fuel-heater · Updated October 5, 2026 · Official notice: NHTSA #20V220000
Cite this page
“Navistar 2017-2021 School Buses: Fire Risk from Fuel Heater.” GovInfoNow, updated October 5, 2026. https://govinfonow.com/recall/79672-navistar-2017-2021-school-buses-fire-risk-from-fuel-heater. Based on NHTSA recall #20V220000 (https://www.nhtsa.gov/recalls?nhtsaId=20V220000).
Why it’s dangerous
The electric fuel heater inside the fuel module can overheat, melting plastic parts and potentially causing a fire. This overheating may also cause the engine to stall, increasing crash risk.
Who’s affected
Owners of 2017-2021 Navistar school buses with Cummins B6.7 diesel engines and fuel module option numbers FS90301 or FS90453 are affected. Drivers and passengers are at risk if the fuel heater overheats.
How to tell if you have this one
Check if your school bus has a Cummins B6.7 diesel engine with fuel module option numbers FS90301 or FS90453. The recall covers 2017-2021 model years.
- Brand
Navistar- Category
Vehicle
What to do — step by step
Contact Cummins
Call 1-800-286-6467 to get free repairs for the fuel heater.
Have Fuel Heater Fixed
Dealers will disable the fuel heater by installing a plug or cover to prevent overheating.
What NHTSA says to do
Cummins will notify the affected Navistar customers and dealers will disable the fuel heater by either installing a plug in place of the heater or otherwise rendering the fuel heater non-operable and remove the fuse supplying electrical power to the fuel heater and install a cover over the wire harness connector, free of charge. The recall began May 28, 2020. Owners may contact Cummins customer service at 1-800-286-6467.
How this recall unfolded
Recall timeline
2 dated steps over 41 days.
- NHTSA received the defect report
- Recall began
Dates from the agency record only; steps without a date are left out.
Contact Navistar
We’ve drafted a message you can send Navistar to request your refund or repair — edit it as you like.
Subject: Recall 20V220000 — Navistar 2017-2021 School Buses: Fire Risk from Fuel Heater Hello, I own a Navistar 2017-2021 School Buses: Fire Risk from Fuel Heater that is covered by recall 20V220000 from Navistar. The official recall notice states: Cummins will notify the affected Navistar customers and dealers will disable the fuel heater by either installing a plug in place of the heater or otherwise rendering the fuel heater non-operable and remove the fuse supplying electrical power to the fuel heater and install a cover over the wire harness connector, free of charge. The recall began May 28, 2020. Owners may contact Cummins customer service at 1-800-286-6467. I’m writing to arrange the remedy described in the recall (a refund, repair, or replacement as applicable). Could you please tell me the next steps to resolve this? Thank you.
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Where this comes from
The facts (hazard, remedy, dates, manufacturer) are pulled from the official NHTSA recall record. The plain-language summary and step-by-step checklist are written by GovInfoNow to make the official notice easier to act on — they don’t replace it.
- Official source: NHTSA Recall #20V220000 (April 17, 2020)
- Plain-language summary written by qwen3:4b on October 5, 2026, from the official record above. Not reviewed by a person — if it conflicts with the NHTSA notice, the notice is correct. Report an error on this page.
- GovInfoNow is an independent service and is not a government agency. We republish official NHTSA recall data; we don’t issue, amend or administer recalls.