Mack Mr Recalls & Complaints by Model Year
NHTSA lists 25 safety recalls and 1 owner complaint across 23 model years of the Mack Mr (1977–2007). The most-complained-about year is 1999.
Pick your Mack Mr model year
| Model year | Recalls | Complaints |
|---|---|---|
| 2007 Mack Mr | 3 | 0 |
| 2006 Mack Mr | 2 | 0 |
| 2005 Mack Mr | 4 | 0 |
| 2004 Mack Mr | 6 | 0 |
| 2003 Mack Mr | 4 | 0 |
| 2002 Mack Mr | 4 | 0 |
| 2001 Mack Mr | 3 | 0 |
| 2000 Mack Mr | 4 | 0 |
| 1999 Mack Mr | 5 | 1 |
| 1998 Mack Mr | 3 | 0 |
| 1997 Mack Mr | 1 | 0 |
| 1996 Mack Mr | 1 | 0 |
| 1995 Mack Mr | 1 | 0 |
| 1993 Mack Mr | 1 | 0 |
| 1992 Mack Mr | 2 | 0 |
| 1991 Mack Mr | 2 | 0 |
| 1990 Mack Mr | 3 | 0 |
| 1989 Mack Mr | 2 | 0 |
| 1988 Mack Mr | 2 | 0 |
| 1987 Mack Mr | 1 | 0 |
| 1979 Mack Mr | 2 | 0 |
| 1978 Mack Mr | 2 | 0 |
| 1977 Mack Mr | 1 | 0 |
What Mack Mr owners complain about
Across all model years, owners have filed 1 complaint with NHTSA. The 1999 model year has the most, with 1.
All Mack Mr recalls (25)
Every NHTSA safety campaign that lists a Mack Mr, most recent first, with the model years each one covers.
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Suspension: front
Mack trucks is recalling certain model year 2002-2005 mr and le heavy trucks, manufactured from february 1, 2002, through december 22, 2004. Over time, the vehicles load may result in fatigue cracks of the front axle beam. These cracks can propagate and result in complete fracture of the axle beam.
Remedy: This recall relates to previous recalls 09v-240 and 10v-069. Analysis of these recalls has shown that after the receiving the remedies, the axles may still crack. As such, mack trucks will replace the affected axles on…
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Axle assembly (power train)
Mack trucks is recalling certain model year 2002 through 2004 cl, cv, le, mr, rb, rd, and model year 2003 through 2004 dm heavy trucks manufactured from february 1, 2002 through september 30, 2003, equipped with axle beams manufactured by bharat forge. The axle beam may have transverse shear lines on the bottom of the axle from the…
Remedy: Mack will notify owners, inspect and replace any affected axle beams free of charge. The safety recall began on march 5, 2010. Owners may contact mack at 1-800-866-1177.
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Axle assembly (power train)
Mack is recalling 10,300 model year 2004 and 2005 cl, cv, dm, le, and rb and model year 2004 rd heavy trucks manufactured from october 1, 2003 through september 30, 2004, equipped with axle beams manufactured by bharat forge. The axle beam may have transverse shear lines on the bottom of the axle from the trimming process.
Remedy: Mack will notify owners, inspect and replace any affected axle beams free of charge. The safety recall began on august 14, 2009. Owners may contact mack at 1-800-866-1177.
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Check valve (service brakes)
Mack is recalling 218 my 2006-2007 mr trucks. A check valve was omitted from the secondary supply port of the sr-7 spring brake modulating valve.
Remedy: Dealers will add a check valve to the secondary supply port of the sr-7 spring brake modulating valve and will also repair the sr-7 valve by applying a check valve repair kit as required for the bendix safety recall…
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Parking brake
On certain trucks equipped with bendix sr-7 spring brake modulating valves, the internal rubber check valve may leak causing a delay in the application of the spring brakes to park the vehicle after the operator pulls the dash valve button.
Remedy: Mack is working with bendix to repair these vehicles (please see 07e037). Bendix will install a check valve repair kit for the affected sr-7 spring brake modulating valve free of charge. The recall began on january 10,…
Model years: 2007
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Air (parking brake)
On certain trucks equipped with sr-7 bendix brake valves, the check valve inside the valve cavity may not properly set, causing internal air leakage. If the check valve does not properly seat, the resulting leakage can cause a delay in the application of the spring brakes to park the vehicle after operator pulls the dash valve button.
Remedy: Dealers will inspect the valves and replace it free of charge. The recall began on august 14, 2006. Owners may contact mack trucks at 1-800-528-6586.
Model years: 2007
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Tank assembly (fuel system)
On certain diesel powered heavy duty trucks, the bolts attaching the fuel tank mounting brackets to the frame may have insufficient torque and therefore may result in premature failure of the fuel tank mounting.
Remedy: Dealers will inspect and replace the fuel tank bracket mounting bolts free of charge. The recall began on february 6, 2006. Owners may contact mack trucks at 1-800-528-6586.
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Suspension
On certain heavy duty class 8 trucks equipped with holland air suspension systems, a transverse beam casting may fracture under normal loads. If a casting breaks when the vehicle is traveling on a roadway there is the potential for pieces of the casting to become projectiles and the suspension's transverse beam may drop down low enough…
Remedy: Dealers will inspect and replace the defective transverse beam assemblies. The recall began on august 19, 2005. Owners may contact mack trucks at 610-709-2131.
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Drum (service brakes)
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.
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…
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Pressure relief devices (fuel system)
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.
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…
Model years: 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
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Check valve (service brakes)
Certain heavy duty vehicles fail to comply with the requirements of federal motor vehicle safety standard no. 121, "air brake systems." improper seating of the check valve retainer in the brass fitting housing has occurred. It is possible for the air brake system pressure to push the check valve internal parts into the primary system…
Remedy: Dealers will replace the check valve. Owner notification began november 26, 2003. Owners should contact mack at 1-610-709-3337.
Model years: 2003
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Service brakes, air: controls, pedals and linkages
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.
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…
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Tie rod assembly (steering)
Vehicle description: heavy duty trucks equipped with tie rod assemblies containing 24-dl model ball sockets and manufactured by trw. Certain of the tie rod ball-socket bearings have a below-specification case depth and/or hardness, which can lead to premature wear of the socket.
Remedy: Dealers will replace the defective tie rods. Owner notification began july 13, 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…
Model years: 1999
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Connection (steering)
Vehicle description: heavy duty trucks equipped with drag link assemblies containing 24-dl model ball sockets and manufactured by trw. Certain of the tie rod ball-socket bearings have a below-specification case depth and/or hardness, which can lead to premature wear of the socket.
Remedy: Dealers will replace the defective drag links. Owner/distributor notification began august 30, 2001. Owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free…
Model years: 1999
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Accelerator pedal (vehicle speed control)
Vehicle description: class 8 trucks equipped with felsted electronic accelerator pedals. The return springs can break on the accelerator pedals that are equipped with stainless steel or electroplated wire return springs.
Remedy: Replacement accelerator pedals equipped with return springs manufactured of music wire with one additional coil on each spring and with an organic coating, eliminating electroplating will be installed.
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Antilock (service brakes)
Vehicle description: heavy duty trucks built with bendix air ABS with an ec-17 1030r electronic control unit (ECU), there have been reports of unwanted ABS activation at low speeds caused by 1) chafed ABS wheel speed sensor wires on rotating parts or 2) a damaged component at the wheel end that generates a certain type of erratic sensor…
Remedy: Dealers will replace the ABS ECU.
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Wheel bearing (suspension)
Vehicle description: class 8 heavy duty truck chassis equipped with mack 16,000 lb., 18,000 lb., or 20,000 lb. Heavy duty steering axles. The inner wheel bearing cone for the steering axle wheel hub assembly does not properly fit onto the mack steering axle spindle assembly. Improper fit of the bearing to the spindle increases the…
Remedy: Dealers will remove the left and right hub/drum assemblies from the steering axles and replace the inner wheel bearing cones and cups.
Model years: 1998
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Linkages (steering)
The steering arm can develop cracks causing the lever to break without warning.
Remedy: Dealers will replace the steering levers with an improved steering lever with increased fatigue strength.
Model years: 1990
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Vehicle speed control
Fuel injection system reconfiguration to comply with engine emission standards cause higher engine vibration levels which lead to early wear and complete failure of the secondary throttle return mechanism.
Remedy: A new production secondary throttle return system configuration will be installed.
Model years: 1987, 1988, 1989, 1990, 1991, 1992
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Trailer hitches
The carrier yoke bolts were manufactured with worn rolling thread dies, causing stress concentrations which caused cracks during the quenching process.
Remedy: Replace the carrier yoke bolts.
Model years: 1992, 1993
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Shift pattern indicator (power train)
The stone bennett shifters do not indicate the relative position of the shift lever to the driver.
Remedy: Install a decal displaying the relative shift positions.
Model years: 1989, 1990, 1991
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Anchorage (seat belts)
Seat belt mounting bolts on the inboard side of riders seat may have been undertorqued.
Remedy: Inspect bolts and properly torque.
Model years: 1988
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Leaf spring assembly (suspension)
The spring seat plate, located between the axle housing and the suspension springs, may deform due to spring bending. As a result, the clamping force in the assembly may be reduced. Loss of clamping force could cause spring failure and the axle will dislocate. Also, the tire could come into contact with the spring.
Remedy: The dealer will replace the existing spring seat with a newly fabricated seat which is welded to the housing. An improved spring clamping plate and new springs will also be installed without charge.
Model years: 1979
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Engine (engine and engine cooling)
In the event of turbocharger compressor wheel failure, one or more of the four capscrews that hold the turbocharger together may be struck by parts of the compressor wheel, resulting in the capscrews being damaged. If these capscrews are damaged to the point that they allow the compressor back plate to dislocate from the turbocharger…
Remedy: Dealer will install a shield for the heads of the four capscrews, along with stronger sae 8 grade 8 capscrews, if necessary, at no cost to owner.
Model years: 1977, 1978, 1979
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Heater core (visibility)
A deficiency in the routing of the heater duct hose could allow the hose to rest against a terminal post of the accessory relay. Vibration will eventually cause the terminal post to penetrate the hose fabric and short circuit the wire reinforcement and overload the circuit.
Remedy: Dealer will replace the portion of the existing hose that is closest to the accessory relay with an all-rubber hose.
Model years: 1978
Other Mack models
- Mack28 complaints
- Anthem (an)12 complaints
- Granite (gr)9 complaints
- CXU6127 complaints
- Ch6 complaints
- Gu6 complaints
- CH6005 complaints
- Cxu5 complaints
Source: NHTSA recall and complaint databases and EPA fuel economy data, October 2026. Complaint counts are owner reports to NHTSA, not verified defects. Recall counts are safety campaigns that list this model year; whether a particular car was already repaired depends on its VIN. How this data is compiled.