Vehicle recall 04V159000 · April 7, 2004

Mack CH, LE and 1 more model

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.

Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.

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.
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.
Remedy: 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.
Notes: Mackrecall no SC0287.CUSTOMERS can 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: 04V159000
Reported to NHTSA: April 7, 2004
Filed by: MACK TRUCKS, INC
Manufacturer campaign: SC0287
Owner notification: April 6, 2004
Vehicles potentially affected: 317
Initiated by: the manufacturer
Components: Fuel system, other › Storage › Tank assembly › Pressure relief devices

Recall 04V159000 on nhtsa.gov, with the manufacturer’s documents

Vehicles covered

As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.

Mack CH (1995-2004): 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995
Mack LE (1995-2004): 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995
Mack MR (1995-2004): 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995

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