Recalls › United Kingdom › ALEXANDER DENNIS ENVIRO 400 H

ALEXANDER DENNIS ENVIRO 400 H — recall

Automotive · United Kingdom · 2025-11-05

Alexander Dennis ENVIRO 400 H engine piston crown may crack, causing fracture

Country	United Kingdom
Category	Automotive
Published	2025-11-05
Manufacturer	ALEXANDER DENNIS
Models affected	ENVIRO 400 H
Units affected	401
Defect	On vehicles with the affected engine the piston crown may develop a crack creating elevated crankcase pressure leading to a fracture of the valve cover. A fractured valve cover may allow oil to escape and in the presence of an ignition source increases the risk of a fire.
Remedy	Install a crankcase pressure sensor and a pressure relief valve.
Recall number	R/2025/419
Official notice	View source ↗

What this means for sellers

Likely platform / channel actions	OEMs/dealers will run the remedy (repair, replace or refund); component suppliers in the chain may face traceback.
Self-check for comparable products	Check your comparable products' design, materials and QC records against the defect described here.
Rules & standards likely involved	the destination market's product-safety rules and mandatory standards

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