Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 BMW X1FACTORY OEM SERVICE PROCEDURE
Transfer Case - Repair
- Transfer Case Oil
- Transfer Case
- 27 10 020 Installing exchange transfer case (ATC 35L)
- 27 10 020 Installing exchange transfer case (ATC 350)
- 27 10 010 Removing and installing transfer case (ATC 35L)
- 27 10 010 Removing and installing transfer case (ATC 350)
- 27 10 050 Replacing output flange for output to the front axle (ATC 35L)
- 27 10 050 Replacing output flange for front axle output (ATC 350)
- 27 10 070 Replacing output flange on rear transfer case (ATC 35L)
- 27 10 070 Replacing output flange on transfer case at rear (ATC350)
- 27 10 730 Replacing transfer case control unit (longitudinal torque module) (ATC 35L)
- 27 10 730 Replacing transfer case control unit (longitudinal torque module) (ATC 350)
- Radial Shaft Seal
- 27 21 010 Replacing radial shaft seal for drive flange (ATC 35L)
- 27 21 010 Replacing radial shaft seal for drive flange (ATC 350)
- 27 21 040 Replacing radial shaft seal for actuator shaft (ATC 35L)
- 27 21 040 Replacing radial shaft seal for actuator shaft (ATC 350)
- 27 21 020 Replacing radial shaft seal for output flange (ATC 35L)
- 27 21 020 Replacing radial shaft seal for output flange (ATC 350)
- 27 21 030 Replacing radial shaft seal for output to the front axle (ATC 35L)
- 27 21 030 Replacing radial shaft seal for front axle output (ATC 350)
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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