You may have heard about the “Stomp Test” that can tell you what trouble codes are stored in your vintage BMW’s engine computer. Unlike modern OBD II cars (from 1995 onward) that use a scan tool plugged into the OBD II port, older cars system is classified as OBD I. Some cars have this OBD I diagnostic port under the hood which can allow for a tool to scan for codes. Fortunately for classic BMW drivers in the US, there is the Stomp Test. This works on cars with Bosch Motronic 1.3 or later, which is in model year 1988 cars and up. If you have a 1987 model year BMW, it may be on the cusp, so it depends on what ECU is in the car and its production date. I have been told this test does not work on European or Euro Spec cars, though have not confirmed myself. How To perform the Stomp Test: Turn the ignition to position two. That’s the second click on turning the key. Do not start the …