I sent this seller a question asking if this MAF was genuine here is the answer below in brackets.
( New message from: rtgroup11 (255,727)
Hi, I can confirm this is 100% genuine bosch all items are ordered directly from bosch
Kind Regards,
Lois )
https://www.ebay.co.uk/itm/Bosch-Mas....c100005.m1851
https://www.ebay.co.uk/itm/153027763644?ul_noapp=true
As always it is the purchases responsibility to double check with any seller that the item is genuine that way you can report back to them if it is not, I have no reason not to believe the seller in this case, I must also point out I have not purchased one from him/them.