@ Andrebxp. I don't think you mentioned the year & version of your X5. Many put this in their signature, which is a great time saver and helps the group to help others.

I just had this happen (you'll see my model & year) on vacation. It was fixed by a local dealer, which was a VERY pleasant experience.

I asked the dealer tech, and service writer, who both drive similar cars (E39) and understood that I'm a serious DIY person. Whether diesel (my car) or gasoline (perhaps you), the in tank pumps are something that will simply wear out. I got nearly 280.000 km on mine - pretty good.

Should you do on terms of preventative repair, I say YES. When is your call.

What to replace to do it right?

(a) In tank unit (on right side of tank)
(b) Fuel sending unit (the part interacts with the pump to keep the tank full on both sides and scavenge from both sides).
(c) Specific (sky blue on my car) DDE relay that controls the pump (glovebox / dash area).

For diesel owners, there is a second pump under the car near the fuel tank, which I will be replacing myself this month. If you have a 218 PS car, the fuel filter is mounted in the same areas. Protective cover needs to be removed for this.

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2002 Euro X5 (E53) 3.0 diesel (M57)
5 speed manual with UUC short shifter.
Pre-xDrive NV125 transfer case (chain & gears).
Factory Xenon headlights, Spyder LED tail lights
Updated vortex crankcase breather.
Motorsport dead pedal, factory fire extinguisher, factory first aid kit, factory F&R mud flaps, factory PDC

Bilstein B6 shocks F&R
Redline oil has replaced "lifetime" fluids (F&R diff, manual transmission, transfer case and P/S).
Dimple magnetic drain plugs in all compartments.