Under the hood, BMW is expected to replace the 4.8-liter V8 (350 hp and 350 lb-ft of torque) with the twin-turbocharged 4.4-liter V8 (400 hp and 450 lb-ft of torque) from the 7-Series.

Our spy photographers have managed to catch a facelifted 2011 BMW X5 undergoing testing in Europe.

Designed to breathe new life into the model, the facelift appears to feature new front and rear bumpers, modified head- and taillights, and trapezoidal exhaust tips. Inside, we can expect minor changes such as an updated iDrive system and a larger LCD display.

Under the hood, BMW is expected to replace the 4.8-liter V8 (350 hp and 350 lb-ft of torque) with the twin-turbocharged 4.4-liter V8 (400 hp and 450 lb-ft of torque) from the 7-Series. The company may also replace the naturally aspirated 3.0-liter I6 (with 260 hp and 225 lb-ft of torque) with the twin-turbo 3.0-liter I6 (N54) or the new twin-scroll turbocharged 3.0-liter I6 (N55) from the 5-Series GT.

Look for more information to be released when the model is officially unveiled next year, possibly at the North American International Auto Show in Detroit.

2011 BMW X5 Facelift Spied Once Again