One problem related to coolant leaking has been reported for the 2006 BMW X3. The most recently reported issues are listed below.
Tl the contact owns a 2006 BMW X3. The contact stated that there was fluid leaking from the vehicle and the coolant warning indicator illuminated. The vehicle was taken to an independent mechanic who replaced the coolant reservoir, but the vehicle continued to leak. The vehicle was not taken to a dealer for diagnostic testing or repairs. The manufacturer was made aware of the failure. The failure mileage was 160,000.