Level of friendliness of a URL

[Pierre_d]

I'm currently trying to make my custom developed module URL friendly.

Everything was working fine with unfriendly URL:

.../index.php?id_category=1001&controller=category&id_lang=2&id_tractor=160.

Now, if I turn Friendly URL on, they look like

 .../en/1001-cooling-system/tractor-208-john-deere-5720/2148-water-pump

However, an even more friendly URL would be

.../en/cooling-system/john-deere-5720/water-pump.

But we all know that PS needs the ids to be able to find the actual category, tractor, part... My question: how will Google treats these URL's ? Because in this case, ids are meaningless for Google, but 5720 is really the tractor model, not the PS id.