Borrowing your car?

CAMBIO car shares,  Cambio points are all over brussels, one at Montgomery, google it & you'll find them.

If I want to borrow a friend's car, I just do so.  If one of my kids wants to borrow mine, they do so. There is no 'system' involved.

Unless you are asking about borrowing/renting a car from a total stranger. 

> borrowing/renting a car from a total stranger

Not allowed. Insurance cover prohibits it.

Also France has several of these systems, including Drivy, Une Voiture a Louer and Buzzcar. According to their Facebook page Buzzcar are planning to expand to Belgium in the near future.

If you need to hire/borrow car cheaper than at rent a car companies let me know. I have car company in Germany but I can make offer also for Belgium if it's at least for one week.  

A complete stranger borrowing my car? You gotta be kidding me! Thrashed to within an inch of it's life and then given back to me, no thanks! LOL

Luxauto rent out cars from around €20 a day upwards depending on size -- includes some free kms

They have sites all over belgium