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A letter including the following information: your name, return mailing address, contact phone number, e-mail address and a brief explanation of the problem you're experiencing with the product. If you’re unable to use the Online Repair Service, please see the instructions below. If your Oral-B product is defective during the warranty period, we will replace it free of charge*. Your Oral-B warranty starts on the day of purchase and runs for 2 years.