Recalls are a well-established global practice; from time to time they are announced by almost all manufacturers of not only cars, but also any other industrial products. But since a car is considered a source of increased danger, it is recalls in the automotive industry that attract the most attention and cause the greatest resonance. Check if your car is covered by a recall campaign. Sometimes manufacturers will recall their cars because of substandard parts or workmanship and repair them for free, regardless of the warranty. This is called a recall campaign. More information on 2004 Hummer H1 recalls can be found in this database. It may be useful to use online problems resource that shows automotive defect patterns, based on complaint data submitted by vehicle owners. The problems are organized into groups with data published by vehicle, component, and specific issue. See also an updated list of 2004 Hummer H1 problems before buying a used car. In most cases, the recall is initiated by the manufacturer. But it also happens that it is forced to do so. The largest and most scandalous recall campaigns were those that were initiated by complaints and lawsuits from consumers through controlling state structures.