NPR analyzed some 15,000 sudden acceleration and similar complaints consumers filed with the National Highway Traffic Safety Administration. Here, you can find out about complaints for each brand and model year going back to 1990 models. To use the database, start by choosing a model year. Then click an automaker's entry to see particular models involved in complaints. Auto safety experts say you should expect a manufacturer's share of complaints for a given year to match its market share. So, a maker that has 10 percent of U.S. sales should have about 10 percent of the complaints. For complaint details, visit the NHTSA Web site. Once there, check for recalls covering cars you own or want to buy.