Repair kit for servomotor transfer case for BMW E60 and E90 ATC300 27107546671

Many drivers appreciate Bavarian cars with a 4x4 torque distribution formula for the absence of drifts and slippage, road stability, good acceleration and cross-country ability even in huge holes. In addition, four-wheel drive vehicles provide engine braking more efficiently than models with only the front or rear axle torque.But they also have their own weakness. All 4WD vehicles are equipped with a transfer case. It is due to this unit that the distribution of torque between the axles is carried out and its increase for the front or rear wheels under bad road conditions.The servomotor activates this device. It has a so-called screw worm that transmits torque. Problems with the servomotor shaft of the transfer case e60, e61, e90, e91, e92 and other all-wheel drive BMWs, in which the ATC300 (27107546671) is installed, begin after 7 years of operation or 130-150 thousand kilometers.The causes of breakdowns can be very different - from grinding a plastic gear to a malfunction of the Hall sensor. But the worm screw will wear out in any breakdown.How to detect a broken servo?The advantage of modern German cars is that in the event of a breakdown, they are not "silent" and actively notify the owner of the malfunction. So, you can find out about a malfunction of the servo drive at once by several signs:1. The panel lights up a "garland" of various errors. As a rule, the system displays problems with ABS, DSC, Brake and the "4x4" icon.2. Violation of the front drive. It either doesn't connect or it doesn't disconnect. The car does not drive well out of various pits and moves on other irregularities.3. Extraneous sounds and surges of torque during fast acceleration. Tapping and crunching, vibrations and jerky jerks when driving will be a clear sign of a broken servo motor.If, after detecting these phenomena, urgently not to repair the transfer case, very soon the front axle may also fail. The system will try to compensate for servo breakage and increase axle load, which will lead to more disturbances.Fortunately, we have a simple, cost-effective solution to this problem for you.Repair kits for ATC 300Many unscrupulous car services advise changing the entire servo drive if there are problems with the shaft. Such an operation is quite expensive, because high-quality original spare parts are expensive. In this case, used and serviceable components of the unit can be spent on cheaper repairs of other cars.We offer you a servomotor repair kit for a BMW transfer case, which has a high-strength shaft made of good steel, resistant to wear, as well as heads for T30, T25 and E7 screwdrivers. After repair, the screw will last you even longer than the original.To replace the worm shaft, you will need to follow a simple algorithm:1. Remove the two screws holding the actuator to the gear cover.2. Disconnect the motor and inspect the shaft. Most often, the thread on it is grinded or broken in places.3. Remove the old worm screw. To dismantle it, it is better to use a grinder. Attempts to pull out the screw may damage the drive elements. Cut off very carefully at the base using the same technology as removing stuck bearings. It is very important not to damage the base shaft of the motor on which the worm screw is mounted.4. Pry off the remainder with a screwdriver and remove it. After removing the top of the screw, this is very easy to do.5. Place the new worm element onto the shaft and press it off. After that, be sure to twist it with your hands on the axis to make sure it moves.On this, the main work can be completed and the servo motor can be assembled. But with such breakdowns, it is often required to lubricate all drive elements. Therefore, you should completely disassemble it. For this, the ATC300 repair kit contains additional elements. You need to follow a simple sequence:1. Remove the bolts from the gearbox using the E7 bit. Then gently pry and remove the cover.2. Remove the two remaining screws on the drive. Then carefully separate the stator from the rotor, moving along its axis. It is important not to lose the rubber pad between them.3. Check the condition of the motor brushes.4. Clean all elements from dirt and renew grease on moving parts. It is important not to damage small parts and brushes.After that, you can collect all the components and install the servo on the transfer case.Our shaft will serve you for a long time and will become a reliable basis for all-wheel drive. Trust the professionals to drive confidently and comfortably!Repair kit suitable for servo motors code 27107546671, 27102449712Please verify the part number on your vehicle before ordering.

• Restores Full 4x4 Functionality — Eliminates common transfer case servo failures in BMW xDrive models (E60, E61, E90, E91, E92) equipped with ATC300 (27107546671), ensuring smooth torque distribution and proper AWD performance.
• High-Strength Worm Shaft Upgrade — Precision-machined from durable steel, our reinforced worm gear resists wear, deformation, and corrosion — lasting longer than the original OEM component.
• Fixes Common Transfer Case Symptoms — Resolves ABS/DSC/Brake/4x4 warning lights, front-drive disengagement, vibration, or jerky torque transfer caused by worn servo motor shafts.
• Cost-Effective & Reliable Solution — Avoid expensive actuator replacement. Our repair kit restores servo operation and extends the life of your transfer case for confident, stable driving on any road.