2004 Freightliner Business Class M2 Recall: ON CERTAIN TRUCKS, INCORRECT SPRINGS WERE INSTALLED IN THE EXHAUST PORT OF…
NHTSA campaign 04V220000 · Service Brakes, Air · filed May 6, 2004 · verified Jul 30, 2026
The defect
ON CERTAIN TRUCKS, INCORRECT SPRINGS WERE INSTALLED IN THE EXHAUST PORT OF CERTAIN AIR MANAGEMENT UNIT (AMU) SOLENOID VALVES AND THEY MAY NOT TURN OFF AFTER ACTUATION.
The risk
DEPENDING ON THE FUNCTION AFFECTED, THIS COULD RESULT IN REAR SUSPENSION AIR PRESSURE LOSS, MALFUNCTION OF THE ENGINE BRAKE, PERMANENT ENGAGEMENT OF THE REAR AXLE DIFFERENTIAL LOCK, OR PREVENT ENGAGEMENT OF THE FIFTH WHEEL SLIDE LOCK. IF THE WARNING INDICATORS IN THE DASH ARE NOT HEEDED, A CRASH COULD OCCUR.
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 AFFECTED VALVES. THE RECALL BEGAN JUNE 29, 2004. OWNERS SHOULD CONTACT FREIGHTLINER AT 1-800-547-0712.
FREIGHTLINER RECALL NO. FL-423.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
| Make | Model | Model years |
|---|---|---|
| Freightliner | Business Class M2 | 2004 |
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Other campaigns involving Freightliner vehicles
All Freightliner Business Class M2 recalls → · All Freightliner recalls →
Source: NHTSA recall database, campaign 04V220000 (manufacturer number FL-423). Data last verified Jul 30, 2026.