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NHTSA·Commercial vehicles·September 3, 2026

Nova Bus recalls Casco engine coolant level sensors over false signals that can shut down the engine

The coolant sensor could send a false signal that makes the engine shut down without warning, which can raise the risk of a crash and of injury when passengers are moved off the disabled bus.

What to do

Owners can contact Nova Bus customer service at 1-800-350-6682 and give recall number ER5937. Nova Bus will reimburse owners for replacing the sensor, and letters are expected to be mailed November 2, 2026.

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NHTSA recall page

Recall details

Product
Casco Coolant Level(Ecl) Sensor
Company
Nova Bus (US) Inc.
Hazard
An unexpected engine shut down can increase the risk of a crash. Additionally, transferring passengers from the disabled bus can increase the risk of injury.
Units
591 pieces of equipment
Reported to NHTSA
September 3, 2026
Identifiers
  • NHTSA campaign number: 26E062000
  • Manufacturer campaign number: ER5937

The headline, summary and steps above are written in plain English from the official notice below. Identifiers are copied exactly as the agency published them. Always check the official notice before you act.

Official notice

The notice's own wording from NHTSA.

Component
ENGINE AND ENGINE COOLING:COOLING SYSTEM
Defect
Nova Bus (US) Inc. (Nova Bus) is recalling certain Casco engine coolant level sensors with part number N108036. The coolant sensor could send a false signal, causing the engine to shut down.
Consequence
An unexpected engine shut down can increase the risk of a crash. Additionally, transferring passengers from the disabled bus can increase the risk of injury.
Corrective action
Nova Bus will reimburse the owners for the replacement of the sensor, free of charge. Owner notification letters are expected to be mailed November 2, 2026. Owners may contact Nova Bus customer service at 1-800-350-6682. Nova Bus's number for this recall is ER5937. This recall expands 25E012.

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