2004 BMW X3 Towing Capacity

Trim	Engine/Transmission	Braked Towing Capacity
2.5I	2.5-liter petrol/gasoline, 5-speed automatic Steptronic	1700kg / 3,748lb~
3.0I	3-liter petrol/gasoline, 5-speed automatic Steptronic	1800kg / 3,968lb~
2.5I	2.5-liter petrol/gasoline, 6-speed manual	1700kg / 3,748lb~

How much can the 2004 BMW X3 tow?

As you can see from the table of towing capacity readings above, not all of the trims can pull the same amount - some are as low as 1700kg whereas some go as high as 1800kg.

What does braked towing capacity mean?

When the manufacturer states that a towing capacity is "braked" they are referring to brakes being fitted to the trailer that the car is towing.

At least one of the axles on the trailer that the vehicle is towing must have brakes fitted and controlled by the car if they describe the capacity as "braked".