One problem related to oil pump has been reported for the 2014 BMW X3. The most recently reported issues are listed below.
Engine began making clanking noise while driving on highway and rapidly worsened. Engine started losing propulsion power and I pulled over. Car towed to mechanic. Oil filter inspected and was covered in metal shavings. Informed that the BMW n20 engine can experience a premature timing chain or oil pump drive chain failure outside of the limited power train warranty period and unanticipated engine timing chain or oil pump drive chain failure may result in extensive engine damage (applicable to my vehicle) and could have resulted in serious safety hazard while driving on congested highways. My engine has been diagnosed as failed and requires a new engine. My vehicle had 76,000 miles at time of failure.