Mack/nexgen/lng relief valves
Defect Summary
On certain chassis built with lng engines, the nexgen lng tank's primary and secondary relief valves could fail to open and relieve tank pressure.
Safety Consequence
This could cause ice buildup on the discharge side of the primary and secondary pressure system allowing the relief system to freeze and become blocked resulting in over pressurization of the lng tanks creating the risk of catastrophic tank rupture which could cause serious injury or death.
Corrective Action
Dealers will retrofit the lng tanks with a new primary relief valve pipe away tube and a new ventilated shroud. the recall began april 6, 2004. owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact mack at 1-610-709-3337.
Similar Recalls
Other recalls from Mack Trucks, Inc. or involving Fuel System, Other.
FAQ: Recall 04V159000
Your rights, the repair process, and what each field on this page means.
What is recall 04V159000?
NHTSA recall 04V159000 was issued by Mack Trucks, Inc. on April 7, 2004. It addresses: Mack/nexgen/lng relief valves. The recall affects approximately 317 vehicles, with the defect involving the Fuel System, Other component.
How do I get this recall repaired?
Contact any authorized Mack Trucks, Inc. dealer and reference NHTSA recall ID 04V159000 or the manufacturer campaign number SC0287. 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.