I ordered this vacuum pump switch from FCP Euro and thought I was ordering part number
31400608. When the part came in it’s actually printed as a
The bag has the new number on it but it’s been ripped open and stapled close. I see from this website that these parts are actually considered cross referenced to each other https://www.ipdusa.com/products/13596/Brake-Booster-Vacuum-Switch-P2-XC90-Various-Genuine-Volvo-31400608-235366.
Am I right in assuming that parts with the newer numbers printed on them are the latest and greatest design and that an older number stamped part is basically older stock that had something considered suboptimal that the manufacturer decided to fix and alter the part somehow, keep its existing role and function, and issue an upgraded revision part number to reflect the new design. Is that accurate?