Bosch Pressure Relief Valves

Hallo zusammen, kann mir jemand sagen was die unteren Stellen der Boschnummer bedeuten (8881541425), ob diese übereinstimmen müssen beim Tausch? (Regelventil der Hochdruckpumpe)
The Bosch service can only assign the upper numbers.

It is a 3L V6 A4 Diesel Audi with the engine code CCWA.

Best regards, Dani

The Bosch number is decisive for "Bosch".
If the part is manufactured for another manufacturer (e.g., VW), its own ET number is also printed. But what does the lower number then mean? It doesn't matter either if you buy the new part from Bosch.