The 250-9610 is a 100% complete Rostra Cruise control kit for the 2010 Mazda 3. Step by step installation instructions included. Easy installation with very little disassembly. Cruise switch installs on the plastic shroud that surrounds the steering column, on the left hand side. Please call with any questions on application or installation. 3 year warranty on parts only. This kit will require soldering at the accelerator pedal. Experience is required and a professional is recommended for installation.