Vehicle recall 04V220000 · May 6, 2004
2004 Freightliner Business Class M2
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.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- 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.
- Consequence
- 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.
- Remedy
- Dealers will replace the affected valves. The recall began June 29, 2004. Owners should contact freightliner at 1-800-547-0712.
- Notes
- 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).
Recall details
- NHTSA campaign
- 04V220000
- Reported to NHTSA
- May 6, 2004
- Filed by
- FREIGHTLINER LLC
- Manufacturer campaign
- FL-423
- Owner notification
- June 29, 2004
- Vehicles potentially affected
- 1,700
- Initiated by
- the manufacturer
- Components
- Service brakes, air › Supply › Check valve
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
- Freightliner Business Class M2 (2004): 2004
Has your Freightliner been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Freightliner dealer can also check your VIN. Recall repairs are free.