A mechanic can find the correct Bosch spark plug for a particular vehicle by searching the spark plug manufacturer's website. A repair person inputs the year, make, model and trim back to 1940 to find the correct industrial spark plugs, as of March 2015.
For example, a mechanic clicks on 2008 to have 50 makes appear, in alphabetical order, from Acura to Volvo. Luxury foreign models such as Ferrari, Bentley, Rolls Royce and Lamborghini are in the database. When someone clicks on Ford for 2008, several models appear. Choosing the model Escape yields three engine types. Mechanics pick one of those engine types to find Bosch parts. Included with those parts are Bosch part numbers for spark plugs that fit the correct engine type for at 2008 Ford Escape.
Mechanics click on the product they want, and then a store finder shows where to buy the spark plug. Details about each type of spark plug include the electrode tip material, gap size, hex size, insulator material and seat type. To find parts for a different vehicle, mechanics click on Change Vehicle to start the selection process over again.
Several classic cars are included in Bosch's database. For example, 33 makes appear in a search for 1940, including Packard, Studebaker, Hudson, Hupmobile and DeSoto. Not all cars may have compatible Bosch parts.