2004 Vehicle Safety Complaints

The 2004 model year cohort has accumulated 77,954 NHTSA consumer safety complaints across 563 nameplates from 49 manufacturers — a cross-section of everything the Office of Defects Investigation has filed for vehicles whose model year stamp reads 2004. Severity indicators inside this cohort include 5,150 crash reports, 1,900 fire incidents, and 238 reported fatalities, all owner-submitted through NHTSA's public complaint portal.

Inside the 2004 cohort, the TOYOTA SIENNA leads the complaint count with 2,588 filings, followed by the FORD F-150 and the NISSAN MAXIMA. On the component side, the most frequently cited category for the 2004 year class is electrical system (6,895 complaints), ahead of air bags and steering. Comparing a single model year against adjacent years is one of the cleanest ways to detect platform-level supplier changes: a sharp year-over-year jump in a specific component, concentrated on a handful of nameplates sharing an architecture, is the classic early-warning signature that regulators and insurance actuaries flag.

Remember that complaint volume is not a reliability ranking. Newer model years have spent less time on the road and therefore accumulate fewer filings, while older model years may be artificially quiet because few examples are still registered. NHTSA's Early Warning Reporting system weights complaints per registered vehicle, not just raw counts, when deciding whether to open a Preliminary Evaluation on a 2004 cohort. Drill into any model in the table below to see its component-level breakdown, safety rating, and recall history — and compare against the 2003 and 2005 cohorts to spot year-over-year discontinuities that point to real defect patterns rather than statistical noise.