Detailed information on pass/fail regulations and validity of grades can be found in the Examination Board Regulations and Guidelines, part of the BSc Mechanical Engineering Student Charter, in Rule 10.
In short the pass/fail regulation for modules teached in the academic year 2018 - 2019 states: a module is successfully completed if the final rounded exam grade is at least a 6 and all grades for the module components are >= 5.5. If, after any resits, only one module component of a module part is < 5.5, the grades for all other module components within that module part will be valid indefinitely and the module component in question can be retaken during subsequent academic years. If the grades for more than one module component within a module part are < 5.5, the entire module part must be retaken.
A student is allowed to have a grade of 5.0 ‐ 5.4 for one component, not being a project, in one of the modules of the first year if the module grade is 5.5 or higher. In addition a student is allowed to have a grade of 5.0 ‐ 5.4 for one component, not being a project, in one of the modules of the second year if the module grade is 5.5 or higher.
For information about the pass/fail regulations of previous years and detailed information / explanation about modules, modules parts and module components reference is made to the BSc Mechanical Engineering Student Charter section G and rule 10 respectively.