ProblemsByVin/engine-complaint-density

Engine-Family Complaint Density

Curated problematic engine families (documented defect patterns — class actions, NHTSA investigations, or 100+ fleet complaints), with total NHTSA complaints, recalls, and complaints normalized per model-year entry. Density lets you compare families of different production volumes.

Columns

column	meaning
engine_family	Engine family name
manufacturer	Manufacturer
displacement	Displacement
configuration	Engine configuration
years	Production years
modelyear_entries	Matching model-year entries in DB
complaints	Total NHTSA complaints across the family
complaints_per_modelyear	Complaints ÷ model-year entries
recalls	Total recalls across the family
alleged_fires	Complaints alleging fire (unverified)
alleged_deaths	Complaints alleging death (unverified)
url	Source page on ProblemsByVin

Source & methodology

Families are the editorial set powering /engines/. For each family we sum complaints/recalls/harm flags across every matching (year, make, model) in the DB. "complaints_per_modelyear" = total complaints ÷ model-year entries present. Complaints are unverified consumer reports.

Canonical version, full methodology, and the other datasets: https://problemsbyvin.com/data/ .

License

CC BY 4.0 — free to use with attribution to ProblemsByVin (https://problemsbyvin.com).