Mack HMMYears to avoid, problems & recalls

NHTSA has 0 owner complaints and 6 safety recalls on record for the Mack HMM.

Years to avoidNoneBased on weighted complaints Best years—Fewest complaints for their age Owner complaints0—Safety recalls61972–1977 model years

Source: NHTSA complaints, recalls, investigations and manufacturer recall reports. Updated daily. How we score years.

Best & worst years

Mack HMM years to avoid

Complaints by model year, colored by the CarFlaw verdict: complaints weighted for crashes, fires and injuries, adjusted for years on the road and compared with the HMM median. Tap a year for its full report.

0 0 0 0 0 0

'72'73'74'75'76'77

Avoid
Caution
Solid
Best
Not rated

1977Not rated–/1000 complaints · 4 recalls 1976Not rated–/1000 complaints · 4 recalls 1975Not rated–/1000 complaints · 2 recalls 1974Not rated–/1000 complaints · 2 recalls 1973Not rated–/1000 complaints · 1 recall 1972Not rated–/1000 complaints · 1 recall

Complaints by system

Most common Mack HMM problems

All model years combined: 0 complaints grouped by the system owners reported.

Box size = number of complaints naming that system. Darker = larger share. One complaint can name more than one system.

6 recalls

Mack HMM recalls

Newest first. The ring shows the share of affected vehicles repaired, from the manufacturer's latest report to NHTSA.

Antilock: control unit/module78V-068 · 1974–1976 · Apr 4, 1978 · 9,700 vehicles Front: anchorage77V-204 · 1976–1977 · Nov 21, 1977 · 11 vehicles Leaf spring assembly: hanger/bracket77V-205 · 1977 · Nov 21, 1977 · 7,400 vehicles Cooling system: fan77V-173 · 1972–1977 · Oct 12, 1977 · 48,000 vehicles Front: anchorage77V-174 · 1977 · Oct 12, 1977 · 6,591 vehicles Driveline: universal joint76V-118 · 1976 · Jul 28, 1976 · 105 vehicles