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Old 10-10-2012, 05:52 PM
02420X3 02420X3 is offline
Officially Welcomed to the 'Fest
Location: Boston
Join Date: Mar 2011
Posts: 934
Mein Auto: 2011 X3 35i
That's the outside air temperature sensor. The matching grill on the passenger side is open on the 35i to provide airflow to the oil cooler.
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