V-band clamp assembly
Defect Summary
Daimler buses north america (dbna) is recalling certain model year 2010 orion vii transit buses manufactured from november 2010 through january 2011, equipped with a cummins isb, isx, isc, or isl diesel engine. the v-band clamp assembly, part numbers q187684, q187685, and q187686, used to connect the inlet and outlet cone sections to the diesel oxidation catalyst (doc)/diesel particulate filter (dpf) include a t-bolt which can fracture and fail when subjected to stress or load. a fracture or failure of the t-bolt may cause the clamp to loosen and the inlet or outlet sections attached to the doc/dpf housing to disconnect.
Safety Consequence
If the inlet or outlet sections disconnect, hot exhaust gases can vent prior to exiting the tailpipe, creating the risk of combustion and a fire. if both clamps fail, there is a risk in some applications that the doc/dpf housing may detach completely, creating a road hazard.
Corrective Action
Dbna is working with cummins to identify and notify owners of the recall campaign. repairs will be performed by authorized cummins dealers free of charge. the safety recall began on october 12, 2011. owners may contact cummins at 1-812-377-5000 or dbna at 905-403-1111.
Similar Recalls
Other recalls from Daimler Buses North America or involving N/A.
FAQ: Recall 11V421000
Your rights, the repair process, and what each field on this page means.
What is recall 11V421000?
NHTSA recall 11V421000 was issued by Daimler Buses North America on August 15, 2011. It addresses: V-band clamp assembly. The recall affects approximately 96 vehicles, with the defect involving the N/A component.
How do I get this recall repaired?
Contact any authorized Daimler Buses North America dealer and reference NHTSA recall ID 11V421000 or the manufacturer campaign number NR (Not Reported). Under federal law, the repair is completely free regardless of vehicle age or owner history.
Is my vehicle included in this recall?
The only way to confirm is to look up your 17-character VIN at nhtsa.gov/recalls. NHTSA's tool will tell you if VIN-by-VIN this exact recall applies.
How long do I have to get a recall repair done?
There is no expiration on most federal safety recalls. Even if your vehicle is years old and you bought it used, the manufacturer is required to perform the repair at no cost.
Where does the data on this page come from?
All information on this page is sourced directly from the U.S. Department of Transportation public dataset for NHTSA recalls. Last refreshed: 2026-05-22. For the most current official notice, visit nhtsa.gov/recalls.