Its always nice to know how fast you are going, especially when asked by a friendly officer of the law. Rebuilt by a vdo factory authorized shop, this is a direct replacement for a non-working speedo. Porsche owners for years have suffered especially from the odometer part of the speedometer failing. vdo goes to the extra measure of installing a tougher odometer gear on the second go around. There is a core charge, which is refundable upon receiving your rebuildable part.