2001 Mack MR Problems: 0 Complaints, 3 Recalls

The worst 2001 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.

Service brakes, air: drumReported June 7, 2004 · 36 vehicles affected

What is wrong: On certain class 8 chassis built with hendrickson lift axles which contained webb brake drums, the brake drums could experience premature crack of the braking surface resulting in reduction or complete loss of braking on that wheel end or loss of brake drum pieces.
Risk: Loss of braking ability could result in a vehicle crash, possibly causing injuries or death.
Remedy: Webb wheel is conducting the owner notification and remedy for this campaign. Webb will notify customers, inspect the brake drums and replace any drums that fail inspection. Owners should contact webb at 1‑800‑633‑3256 or mack at 1‑610‑709‑3337.

Recall number 04V258000 · Recall details

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

Service brakes, air: controls, pedals and linkagesReported August 1, 2001 · 8,268 vehicles affected

What is wrong: Vehicle description: heavy duty trucks equipped with certain meritor-wabco brake system two and four port relay valves. The valve may stick open when a high-pressure application is released.
Risk: When the valve sticks open, it can result in a total loss of air from either the service or the park brake system. The driver may lose braking ability under a service application, possibly resulting in a vehicle crash.
Remedy: Dealers will replace these valves. Owner notification began november 16, 2001. 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 1‑610‑709‑3011 or meritor wabco at 800‑535‑5560.

Recall number 01V189004 · 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 2001 Mack MR before you buy

Is the 2001 Mack MR reliable?

Owners have filed 0 complaints about the 2001 Mack MR.

What is the most common problem with the 2001 Mack MR?

There are not enough complaints to tell.

How many recalls does the 2001 Mack MR have?

3 recalls, covering service brakes, air and fuel system, other.

See the problems and recalls for an exact car

Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.