RecallMyCar

Mack Rm Recalls & Complaints by Model Year

NHTSA lists 15 safety recalls and 0 owner complaints across 22 model years of the Mack Rm (1972–1993).

15
safety recalls, all years
0
owner complaints, all years
1977
year with most recalls

Pick your Mack Rm model year

Model yearRecallsComplaints
1993 Mack Rm10
1992 Mack Rm20
1991 Mack Rm10
1990 Mack Rm10
1989 Mack Rm20
1988 Mack Rm30
1987 Mack Rm30
1986 Mack Rm20
1985 Mack Rm10
1984 Mack Rm10
1983 Mack Rm10
1982 Mack Rm10
1981 Mack Rm10
1980 Mack Rm10
1979 Mack Rm20
1978 Mack Rm20
1977 Mack Rm60
1976 Mack Rm30
1975 Mack Rm30
1974 Mack Rm30
1973 Mack Rm10
1972 Mack Rm10

All Mack Rm recalls (15)

Every NHTSA safety campaign that lists a Mack Rm, most recent first, with the model years each one covers.

  1. Vehicle speed control

    NHTSA 94V032000 Reported 39,777 vehicles potentially affected MACK TRUCKS, INCORPORATED

    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

  2. Trailer hitches

    NHTSA 93V024000 Reported 4,924 vehicles potentially affected MACK TRUCKS, INCORPORATED

    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

  3. Linkages (visibility)

    NHTSA 90V051000 Reported 2,350 vehicles potentially affected MACK TRUCKS, INCORPORATED

    A tolerance mismatch in the crank assembly of the bosch windshield wiper motor could cause instantaneous separation of the crank from the linkage assembly in the left hand control arm assembly; this would make the system inoperable.

    Remedy: Replace left hand control arm linkage assembly.

    Model years: 1989

  4. Linkages (steering)

    NHTSA 90V034000 Reported 1,862 vehicles potentially affected MACK TRUCKS, INCORPORATED

    Crack may develop on steering arm that could progress and reduce the fatigue life of the steering arm.

    Remedy: Install a redesigned steering arm.

    Model years: 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988

  5. Gear box (other than rack and pinion) (steering)

    NHTSA 88V043000 Reported 259 vehicles potentially affected MACK TRUCKS, INCORPORATED

    The steering shaft spline engagement is only .52, the recommended engagement is 2 inches.

    Remedy: Replace shafts that measure under the minimum engagement dimensions with a longer shaft.

    Model years: 1986, 1987, 1988

  6. Leaf spring assembly (suspension)

    NHTSA 79V171000 Reported 1,706 vehicles potentially affected MACK TRUCKS, INCORPORATED

    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

  7. Engine (engine and engine cooling)

    NHTSA 79V133000 Reported 23,000 vehicles potentially affected MACK TRUCKS, INCORPORATED

    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

  8. Interconnecting assembly(wiring) (service brakes)

    NHTSA 78V210000 Reported 19,370 vehicles potentially affected MACK TRUCKS, INCORPORATED

    Delays of up to about 2 seconds may exist in the brake application times to the brakes on the bogie axles in the presence of certain types of wheel speed sensor signal discontinuities or distortions that may occur as a result of sensor wire failure. This constitutes a non-compliance to federal motor vehicle safety standard no. 121, "air…

    Remedy: Dealer will install new wheel speed sensors that incorporate improved wiring and the present bogie anti-wheel lock system will be changed to an axle-to-axle system for improved reliability.

    Model years: 1977, 1978

  9. Service brakes, air: control unit/module

    NHTSA 78V068000 Reported 9,700 vehicles potentially affected MACK TRUCKS, INCORPORATED

    An axle "no brake" condition could result from an eaton controller internal electrical malfunction. This condition may cause the anti-wheel lock valve solenoid to be continuously energized and prevent the brakes from being applied on one of the axles. As a result, the anti-wheel lock warning lamp is not activated.

    Remedy: The dealer will inspect and, if necessary, replace the anti-wheel lock controller without charge to owner.

    Model years: 1974, 1975, 1976

  10. Hanger/bracket (suspension)

    NHTSA 77V205000 Reported 7,400 vehicles potentially affected MACK TRUCKS, INCORPORATED

    A deficiency exists in the welds securing the rear spring insulator bracket to the axle housing. This is due to improper positioning of the weld, in relationship to the bracket and axle housing. Failure of the welds would cause separation of the spring insulator bracket and the axle housing, resulting in improper alignment of the…

    Remedy: Dealer will reweld the insulator spring bracket at no cost to owner.

    Model years: 1977

  11. Fan (engine and engine cooling)

    NHTSA 77V173000 Reported 48,000 vehicles potentially affected MACK TRUCKS, INCORPORATED

    The flex blade fans on the involved vehicles may develop cracks in the laminated stiffener as a result of fatigue during operation. If such a condition exists and the cracks go undetected, continued operation could cause pieces of the stiffener to break off.

    Remedy: Dealer will replace the original fan with a steel fixed blade fan, free of charge.

    Model years: 1972, 1973, 1974, 1975, 1976, 1977

  12. Anchorage (seat belts)

    NHTSA 77V174000 Reported 6,591 vehicles potentially affected MACK TRUCKS, INCORPORATED

    The involved vehicles do not conform to federal motor vehicle safety standard no. 209, "seatbelt assemblies". Although the seatbelts in question performed marginally with respect to the 5000 lb. Load requirement, additional testing confirmed that the anchor could fail, allowing either the anchor to slip over the hold-down nut or the…

    Remedy: Dealer will inspect and, if necessary, replace seat belt assemblies without charge to owner.

    Model years: 1977

  13. Wheels

    NHTSA 77V096000 Reported 825 vehicles potentially affected MACK TRUCKS, INCORPORATED

    The front wheel rim clamp studs, installed on the involved vehicles, may not have been manufactured correctly, causing a brittle condition in the thread root area. The studs could eventually crack and break when wheel nuts are tightened to specifications.

    Remedy: The dealer will replace all suspect front wheel studs, without charge to owner.

    Model years: 1977

  14. Universal joint (power train)

    NHTSA 76V118000 Reported 105 vehicles potentially affected MACK TRUCKS, INCORPORATED

    Model years: 1976

  15. Hoses, lines/piping, and fittings (service brakes)

    NHTSA 75V192000 Reported 1,200 vehicles potentially affected MACK TRUCKS, INCORPORATED

    Model years: 1974, 1975

Other Mack models

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.