Scheme for implementing the base of maintenance periods for cars?

Question

Database design

There is a need to create our own database of scheduled maintenance for cars by brand, modification, with periods of maintenance by mileage. Who is driving - saw such.
My scheme goes like this - brand - model - modification - MOT. THAT we have a model with a list of services and spare parts. Everything is clear there.
Modifications have their own type of gearbox and their own type of engine. The question is - are there modifications with the same designation, but with different gearboxes? Or is the logic wrong? Who has been working on cars for a long time - tell me) I was very surprised, I thought everything was easier with you) I have never worked with automotive topics.
Or maybe I'm reinventing the wheel for nothing? Such databases should definitely exist, even if they are paid. How to look for these?

Answer 1

If there are entities (modifications) with the same name, then you can make an addition from a distinguishing one. For example (not a car): Alan Jackson (country)and Alan Jackson (jazz).