The aboriginal 4X4 was accessible with two inline six-cylinders, one actuality a 2.5-litre (184 hp; 2.5i model) and the added a 3.0-litre (225 hp; 3.0i model), both adopted from the 3 Series auto line. In 2007, the agent agency was revised: the 2.5-litre was dropped, and a 215-hp adaptation of the aboriginal 3.0-litre became the abject engine, while a 260-hp motor was the upgrade. For 2009, the abject 3.0i archetypal was dropped, and the actual archetypal renamed as the drive, and in 2010, an drive was added, application a less-powerful adaptation of the 1930s' engine.
Initial chiral choices were a six-speed chiral that could be motioned to a five-speed automated with either engine. A 2005 4X4 3.0i was rated at 13.8/8.8 L/100 km (city/highway) with the chiral transmission. For 2007 models, with their revised agent agency and fresh six-speed auto, ammunition burning is lower, with ratings for all models advancing in amid 12.2/8.2 and 12.5/8.4 L/100 km (city/highway), behindhand of agent or chiral choice.
Consumer Reports gives the 4X4 a acclimated agent believability appraisement of boilerplate to above-average, depending on archetypal year.
Possible causes ambit from a bad caster acceleration sensor (these assignment with the anti-lock braking and absorption ascendancy systems) to a bad sensor in the all-wheel drive alteration case gearbox. Consumer Reports gives 2007 and 2008 4x4 below-average marks in the publications “transmission – minor” category. An agent cooling arrangement botheration acclaimed by Consumer Reports is related, best as I can determine, to abounding mentions in BMW forums of drivers actuality alerted to a low coolant akin by the car’s on lath computer. Watch for bad air conditioning compressors and refrigerant leaks in earlier models.
Consumer Reports additionally addendum a amazing bead in affection in ability accessories in newer models, and agitation with squeaks and rattles and anatomy accouterments in aboriginal models, which speaks to wear-and-tear issues.
The Insurance Institute for Highway Safety (ISIS) gives all 4x4 its top-tier “good” appraisement in both aboveboard account and ancillary appulse tests, and its achievement becoming the archetypal the ISIS' “Top Safety Pick” accolade for 2009.