1997 Mack MR Problems: 0 Complaints, 1 Recall

The worst 1997 Mack MR problems

Ranked by number of owner complaints. Mileage and cost come from what owners wrote.

Tap a problem to see which part fails, at what mileage and in which other years.

Fuel system, other: storage: tank assembly: pressure relief devicesReported April 7, 2004 · 317 vehicles affected

What is wrong: 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.
Risk: 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.

Recall number 04V159000 · Recall details

Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.

Used buying checklistWhat to check on a 1997 Mack MR before you buy

Is the 1997 Mack MR reliable?

Owners have filed 0 complaints about the 1997 Mack MR.

What is the most common problem with the 1997 Mack MR?

There are not enough complaints to tell.

How many recalls does the 1997 Mack MR have?

1 recall, covering fuel system, other.

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