Mack Hmm years to avoid
Across 1972–1977, no single Hmm year stands out as one to avoid by our thresholds. The 1977 drew the most complaints; 1977 the fewest.
0
Total complaints
6
Recall campaigns
1972–1977
Years covered
0
Years to avoid
Complaints by model year
Every Hmm year
Common questions
What is the best year for the Mack Hmm?
By complaint volume, 1977 has the cleanest NHTSA record among Hmm years with enough data to compare.
How many recalls does the Mack Hmm have?
Across all model years, the Hmm has 6 distinct NHTSA recall campaigns and 0 consumer complaints on file.
Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.
Compiled by Sharon Ben-Moshe, Founder.