Reference OE/OEM Number: 27107566296, 27107568267, 27107566296GR, 8473227771, 8472227771, 093509010 Fitment: For BMW X3 E83 2004-2011 For BMW X5 E53 E70 2000-2013 For BMW X6 E71 E72 2007-2014 For Land Rover Discovery 2004-2016 For Land Rover Range Rover 2002-2016 For Mercedes-Benz GL-Class X164 X166 2006-2015 For Mercedes-Benz M-Class W164 2005-2015 Material: Plastic / Carbon Fiber mixture Size: 5.2cm/2.2in x 5.3cm/2in x 3.5cm/1.4in x 4cm/1.6in Have you problem with Brake, ABS, and 4X4? Lights all lit? The gear within your transfer case actuator wears and causes the symptoms noted above. Attached to the transfer case is an actuator motor, within in this there is a poor quality Nylon plastic gear, this is turned by a metal worm gear. Over time the Nylon wears down and strips and leads to the gear not turning; this results in the symptoms noted above. Fit our improved design actuator gear and restore your actuator motor. Replace just the failing component the Nylon gear with our replacement gear made from a plastic / Carbon Fiber mixture; This will repair the issue and save the cost of a new actuator motor that would just fail again. A high quality precision made improved material replacement part.