Safety tests of heavy vehicle brake systems should be carried out for the safety of highways. There is a legal obligation to check whether the parts approvedby the competent authorities are used in brake systems or not. For this purpose,the sealing test is generally performed to check whether the system is workingeffectively and efficiently or not. In this study, the sealing test is dependent onhow the operator who implements the test carefully. The operator must governthe test period carefully so that the data obtained must be accurately calculatedand accordingly, the test result must be evaluated by the operator. In these operations performed manually, the operator may make errors that affect the results. In this study, a micro controller card and pressure sensor is used for thecomputer aided testing of air brake system sealing of heavy vehicle vehicles.The aim of this study is to develop test equipment with an interface software forautomatic testing of heavy vehicle infiltration. With the developed tester, the reliability of the current manual test has been significantly increased and the timespent by the operator on the test has been minimized. Considering that one million vehicles are inspected annually, a labor force saving of 4 million minutesper year has been achieved.