Febi is kinda hit or miss on quality, and it seems their production is somewhat global. I get rubber bits that have in the mold "Germany" inside of boxes labeled "Taiwan".
I have used Febi cylinder head bolts without troubles for years, in boxes that say "Febi-Germany" and are full of German wording on the label, and then have an extra "made in Taiwan" sticker affixed.
I get tie rods that are Febi boxed, that are enclosed in a bag inside that says "made in Spain" and MOOG tie rods for the same car in a MOOG box, and you open them up and the same part, with the same Spanish label, is inside.
I put a set of brand new IDI Bosch injectors in a 300D, and they were made in India. They seemed to work OK.
I often use Veico brand plastic water necks for Volkswagens, and they have VAG part numbers on them, with the "VW-Audi" logos ground off, and some are made in China and some are made in Mexico. There are many OE replacement bits you buy from Volkswagen dealers, such as AMP connector shells, that are made in China. But you buy that same water neck from Volkswagen, it is German.
I use genuine Volkswagen power window regulators, usually made in Germany by Brose, to replace the Brose ones from Mexico or Brazil that broke. But last week, the dealer was out of the one I needed, so I tried a Pimax brand regulator that was made in Italy.... it fit like CRAP. And it was a major PITA to install and get set correctly. It was not worth the half price, IMHO.
I buy new balancers for AHU engines from Worldpac, they come in a Reinz branded box, and are an OE part inside, VW/Audi logo and all, made in Germany. Buy a balancer for a Hyundai engine from Worldpac, it is Dorman and made in China and will fly apart before the next oil change, guaranteed.
I can buy Aisin water pumps for Toyotas, that are identical to OE Toyota parts you get from the dealer, except the word "TOYOTA" has been carefully machined off the casting. But if you buy an AC-Delco brand water pump for a GM product, it is a Chinese POS that may or may not leak as soon as you put coolant in the engine.
It is really tough anymore to know what is good and what is bad, and you almost have to experience what works, what fits, what functions, and what doesn't.