RecallMyCar

1977 Mack RS Recalls, Complaints & Specs

7 safety recalls list the 1977 Mack RS. Check your own VIN below.

7
safety recalls
0
owner complaints to NHTSA

7 safety recalls for the 1977 Mack RS

Most recent first. Recall repairs are free at any authorised dealer. Click a recall for the full defect, consequence and remedy text.

  1. 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.

  2. Steering wheel/handle bar (steering)

    NHTSA 79V134000 Reported 64,150 vehicles potentially affected MACK TRUCKS, INCORPORATED

    In the involved trucks it is possible the adjustable steering column rear mounting bracket could fail, allowing steering wheel assembly to fall down onto the operator"s lap.

    Remedy: Dealer will install an additional bracket in this area to prevent the steering wheel from dislocating in the event of a bracket failure.

  3. Electrical system: wiring

    NHTSA 78V222000 Reported 161 vehicles potentially affected MACK TRUCKS, INCORPORATED

    A short circuit could occur due to chafing or wire disconnection in the box.

    Remedy: The wiring in the sleeper box will be corrected, free of charge.

  4. 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.

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

    NHTSA 78V030000 Reported 400 vehicles potentially affected MACK TRUCKS, INCORPORATED

    A design deficiency exists in the air dryer piping in the area of the pressure relief valve and compressor governor control link. Moisture is passed and builds up in this relief valve and control line. In freezing ambient temperatures, this moisture may freeze, allowing the chassis air system pressure to exceed 150 PSI. Excessive air…

    Remedy: The dealer will relocate the air system compressor governor line and pressure relief valve to eliminate moisture accumulation.

  6. 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.

  7. Multi piece (wheels)

    NHTSA 77V149000 Reported 250 vehicles potentially affected MACK TRUCKS, INCORPORATED

    The front wheel aluminum hubs on the involved vehicles may be subject to cracks which may progress circumferentially around the barrel of the hub. This could lead to a fracture in the "barrel" position of the hub and complete hub failure.

    Remedy: Dealer will install steel hubs in place of aluminum hubs without charge to owner.

No owner complaints on file

NHTSA has no owner complaints on file for the 1977 Mack RS. For context, the average model year in NHTSA's database has dozens; a zero can mean a reliable vehicle, a rare one, or both.

Compare Mack RS model years

Recall and complaint counts for every Mack RS model year in NHTSA's database.

Model yearRecallsComplaints
1966 Mack RS10
1967 Mack RS10
1968 Mack RS30
1969 Mack RS40
1970 Mack RS50
1971 Mack RS80
1972 Mack RS40
1973 Mack RS20
1974 Mack RS70
1975 Mack RS70
1976 Mack RS40
1977 Mack RS70
1978 Mack RS50
1979 Mack RS30

Checking a specific 1977 Mack RS

How do I know if my 1977 Mack RS has an open recall?

Enter your 17-character VIN above. The VIN is on the driver's side dashboard (visible through the windshield), the driver's door jamb sticker, and your registration or insurance card. The check runs against NHTSA's live database and tells you which campaigns list your vehicle. 7 campaigns currently list the 1977 Mack RS; your car may already have been repaired under some of them.

Is the recall repair free?

Yes. Under federal law, manufacturers must fix safety recalls at no charge for vehicles up to 15 years old from the date of sale to the first owner. Contact any authorised Mack dealer with your VIN and the NHTSA campaign number (for example 77V149000).

What is the difference between a recall and a complaint?

A recall is a safety campaign filed by the manufacturer or ordered by NHTSA, with a defined defect and remedy. A complaint is a report an owner sent to NHTSA; it is not verified, but patterns of complaints are what trigger NHTSA investigations and, eventually, recalls.

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.