Pagr 98 of MY03 X5 manual (USA)

Flat tire
If there is a tire failure with a loss of inflation failure, the red indicator lamp comes on or the message - TIRE LOW/FLAT - appears in the check Control. In addition, an acoustic signal sounds.

If this occours, reduce vehicle speed immediately and stop the vehicle in a safe location. Avoid hard brake applications. Do not oversteer. Replace the flat tire.