BMW X3 Service & Repair Manual > Tire pressure monitor system reminder: Tpms reminder reset - procedure 5
CAUTION: When driving with snow chains or a space-saver spare tire, DO NOT initialize
the system.
1. Set the tire pressure of all wheels to specification.
2. Start engine, but do not start driving.
3. Press reset button (for no longer than 10 seconds) until tire pressure warning light illumi ...