2002–2004 Orion Vii Recall: ON CERTAIN BUSES EQUIPPED WITH COMPRESSED NATURAL GAS OR DIESEL ENGINES…
NHTSA campaign 04V544000 · Engine and Engine Cooling · filed Nov 11, 2004 · verified Sep 13, 2026
The defect
ON CERTAIN BUSES EQUIPPED WITH COMPRESSED NATURAL GAS OR DIESEL ENGINES, THE HYDRAULIC COOLING FAN MOTOR PIPES CAN LEAK.
The risk
A HYDRAULIC LEAK WHICH IS NOT ATTENDED TO READILY MAY CONTINUE TO PROVIDE EXPOSED OIL IN THE ENGINE COMPARTMENT.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
DEALERS WILL REPLACE THE HYDRAULIC PIPES WITH FLEXIBLE HOSES. AN INTERIM OWNER NOTIFICATION LETTER WAS MAILED ON MAY 17, 2005. THE RECALL BEGAN ON SEPTEMBER 30, 2005. OWNERS SHOULD CONTACT ORION AT 905-403-7832.
CUSTOMERS CAN ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S AUTO SAFETY HOTLINE AT 1-888-DASH-2-DOT (1-888-327-4236).
Affected vehicles
Related recalls
More Orion Orion Vii recalls
Other campaigns involving Orion vehicles
Source: NHTSA recall database, campaign 04V544000. Data last verified Sep 13, 2026.