If enough consumers complain about the same problem with the same type of vehicle, the National Highway Traffic Safety Administration (NHTSA) may open an investigation. The Office of Defects Investigation (ODI) is the agency in charge of performing those investigations.
The 1991 4Runner has been investigated 4 times, which is more than any of the other 14 years. On average you can expect 1.87 investigations per model year and we've listed some of the most recent below.
Toyota 4Runner Investigations
A investigation can involve multiple model years, so we've ranked each of the 15 4Runner years and sorted them by how many times they've been involved in a specific campaign.
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