BMW's xDrive all-wheel-drive system is permanently engaged and has a built-in rear-wheel bias. On smooth, dry roads, 60% of the power goes to the rear wheels and 40% to the front.

2013_328

When xDrive detects wheel slip, it automatically sends more torque to wheels that have greater traction. In some situations, all power can temporarily go to either the front or rear. When parking, 100% of the power goes to the rear wheels.

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Answered by Rick Popely on March 14, 2013 in BMW , BMW 3-Series , I'm Just Wondering | Permalink

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