Safety Complaint

What It Means

Any member of the public can file a vehicle safety complaint with NHTSA free of charge by calling the Vehicle Safety Hotline (1-888-327-4236), submitting online at nhtsa.gov/file-complaint, or using the SaferCar mobile app. Complaints are entered into the Office of Defects Investigation (ODI) complaint database, which has logged more than 1.5 million consumer reports since the modern system launched in 1995 and now accumulates roughly 45,000 to 60,000 new complaints per year across vehicles, equipment, tires, and child safety seats. Each complaint record captures the make, model, and model year, the vehicle identification number (if supplied), the component category (brakes, steering, airbag, fuel system, powertrain, etc.), a narrative description of the problem, and a set of structured flags indicating whether the incident involved a crash, a fire, injuries, fatalities, or occurred while the vehicle was in motion. NHTSA engineers review incoming complaints daily, looking for clusters of similar failures across make/model/year combinations, three independent complaints about the same component failure can be enough to trigger a preliminary screening, and statistically anomalous clusters often escalate to formal defect investigations. Complaint data is the earliest public indicator of emerging safety issues; the Toyota unintended acceleration investigation of 2009-2010, the GM ignition switch recall of 2014, and the Hyundai/Kia engine-fire recall of 2015-2019 were all driven by patterns visible in ODI complaint data years before formal recalls. RecallCheck indexes every NHTSA complaint tied to a VIN or make/model/year via the Complaints API, normalizes the component categories, and surfaces complaint frequency and crash/fire involvement on every vehicle page. Complaint frequency is weighted at 30 percent of the proprietary Safety Score.

Safety Complaint is one of the NHTSA or vehicle-safety concepts that recurs across RecallIndex. The definition above is the technical answer; below is how the concept connects to the NHTSA data that drives every vehicle page on the site.

In the RecallIndex Safety Score, this concept feeds one of the four factor weights — recall severity (40 percent), complaint frequency (30 percent), crash and fire reports (20 percent), or trend direction (10 percent). The methodology page on the site walks through every input in detail.

Frequently Asked Questions