Recall Register

1979 Mack MR: recalls and complaints

NHTSA lists 2 recall campaigns for the 1979 Mack MR. The newest campaign is 79V171000. NHTSA received the report on 12 Jul 1979. The NHTSA record gives the component Suspension / Rear / Springs / Leaf Spring Assembly. NHTSA has no complaint on file for this model year.

The NHTSA recall file shows no do-not-drive advisory and no park-outside advisory on these campaigns.

This page cannot show if a recall applies to one vehicle. The NHTSA VIN lookup shows the unrepaired recalls of one vehicle.

Remedy of the newest campaign, 79V171000, in the NHTSA record

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.
NHTSA VIN lookup

Complaint information entered into NHTSA’s Office of Defects Investigation vehicle owner's complaint database is used with other data sources to identify safety issues that warrant investigation and to determine if a safety-related defect trend exists.

NHTSA publishes these words. Source: NHTSA Datasets and APIs, section Complaints, read on . Complaint file through . Recall file through .

Since the last update

No tracked figure of this page changed in a data update. What the log tracks

All updates to the register

Recall campaigns

2 campaigns, newest first. 24,706 units in total.

  1. 79V171000Received . 1,706 units.

    Suspension / Rear / Springs / Leaf Spring Assembly

    Defect, in the NHTSA record
    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, in the NHTSA record
    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.

    Report filed by MACK TRUCKS, INCORPORATED. Owner notification date in the NHTSA record: .

  2. 79V133000Received . 23,000 units.

    Engine and Engine Cooling / Engine

    Defect, in the NHTSA record
    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 bearing housing, engine lubricating oil may be allowed to escape under pressure, contacting the engine exhaust manifold sections or turbocharger turbine housing.
    Remedy, in the NHTSA record
    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.

    Report filed by MACK TRUCKS, INCORPORATED. Owner notification date in the NHTSA record: .

The campaign number opens the NHTSA record. Each quotation is the text of the NHTSA recall file.

Recall campaign: One recall in the NHTSA recall file, with one campaign number. A campaign can name many makes, models and model years.

Units: The number of vehicles or products that a recall can include. The manufacturer or the firm reports the number to the agency.

Complaints by component

The NHTSA complaint file has no complaint for this model year.

Investigations

The NHTSA investigation file has no investigation that names this model year.

Investigation: A study of a possible safety defect by the NHTSA Office of Defects Investigation. An investigation with no closing date in the NHTSA file is open.

Other model years

The number under each year is the number of recall campaigns.

  1. 19771
  2. 19782
  3. 19792
  4. 19871
  5. 19882
  6. 19892
  7. 19903
  8. 19912
  9. 19922
  10. 19931
  11. 19951
  12. 19961
  13. 19971
  14. 19983
  15. 19995
  16. 20004
  17. 20013
  18. 20024
  19. 20034
  20. 20046
  21. 20054
  22. 20062
  23. 20073

A year without a link has fewer than 2 campaigns and fewer than 25 complaints. It has no page.

Official channels

Cite this page

Recall Register. 1979 Mack MR: recalls and complaints. https://recallregister.com/vehicle/mack/mr/1979/. Source: NHTSA Office of Defects Investigation, recall, complaint and investigation files. Data through .

Sources

Source
NHTSA Office of Defects Investigation
Licence
US government work, public domain
Recall file through
29 Sep 2026
Complaint file through
15 May 2019
First complaint in the file
1 Jan 1995
Manufacturer in the recall file
MACK TRUCKS, INCORPORATED

The NHTSA record is the authority. A complaint count is the number of different complaint numbers for the make, the model and the model year. How the register is made. Report an error.

Questions

How many units are in the recall campaigns for the 1979 Mack MR?
24,706 units in 2 campaigns. A campaign can name other models and model years, and its units include them.
How many recall campaigns does the Mack MR have for all model years?
NHTSA lists 25 recall campaigns for the Mack MR, model years 1977 to 2007. 2 of them name the 1979 model year.
Is an NHTSA investigation of the 1979 Mack MR open?
The NHTSA investigation file has no investigation that names this model year.