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.
2021 BMW 740iFACTORY OEM SERVICE PROCEDURE
Front Axle -- Repair (2 Of 2) (G12)
- 31 12 Wishbone And Strut With Rubber Mount
- 31 12 002 Removing and installing/replacing top left wishbone (all 7' series models 2016-2022)
- 31 12 003 Removing and installing/replacing top right wishbone (740i 2016-2022, 740i xDrive 2017-2022, 750i 2016-2019, 750i xDrive 2016-2022, M760i xDrive 2017-2022)
- 31 12 004 Removing and installing/replacing wishbone, bottom, left or right (740i 2016-2022, 750i 2016-2019)
- 31 12 050 Removing and installing/replacing left or right tension strut (740i 2016-2022, 750i 2016-2019)
- 31 12 004 Removing and installing/replacing wishbone, bottom, left or right (740i xDrive 2017-2022, 740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022, 750i xDrive 2016-2022, M760i xDrive 2017-2022)
- 31 12 024 Replacing wheel guide joint in left or right wishbone (740i xDrive 2017-2022, 740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022, 750i xDrive 2016-2022, M760i xDrive 2017-2022)
- 31 12 043 Removing and installing/replacing left or right spring strut holder (740i xDrive 2017-2022, 740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022, 750i xDrive 2016-2022, M760i xDrive 2017-2022)
- 31 12 050 Removing and installing/replacing left or right tension strut (740i xDrive 2017-2022, 740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022, 750i xDrive 2016-2022, M760i xDrive 2017-2022)
- 31 12 003 Removing and installing/replacing top right wishbone (740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022)
- 31 21 Wheel Bearings And Steering Knuckle
- 31 21 090 Replacing left/right swivel bearing (740i 2016-2022, 750i 2016-2019)
- 31 21 180 Replacing wheel bearing for front wheel (740i 2016-2022, 750i 2016-2019)
- 31 21 090 Replacing left/right swivel bearing (740i xDrive 2017-2022, 740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022, 750i xDrive 2016-2022, M760i xDrive 2017-2022)
- 31 21 180 Replace front wheel bearings (740i xDrive 2017-2022, 740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022, 750i xDrive 2016-2022, M760i xDrive 2017-2022)
- 31 35 Anti-Roll Bar
- 31 35 000 Removing and installing/replacing front anti-roll bar (740i 2016-2022, 750i 2016-2019)
- 31 35 014 Removing and installing/replacing the anti-roll bar link, left (all 7' series models 2016-2022)
- 31 35 015 Removing and installing/replacing the anti-roll bar link, right (all 7' series models 2016-2022)
- 31 35 000 Removing and installing/replacing front anti-roll bar (740i xDrive 2017-2022, 740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022, 750i xDrive 2016-2022, M760i xDrive 2017-2022)
- 31 50 Front Axle Differential
- 31 50 001 Removing and installing front axle differential (740i xDrive 2017-2022, 745e xDrive PHEV 2020-2022)
- 31 50 002 Replace front axle differential (740i xDrive 2017-2022, 745e xDrive PHEV 2020-2022)
- 31 50 001 Removing and installing front axle differential (750i xDrive 2016-2022)
- 31 50 002 Replace front axle differential (750i xDrive 2016-2022)
- 31 50 001 Removing and installing front axle differential (M760i xDrive 2017-2022)
- 31 50 002 Replace front axle differential (M760i xDrive 2017-2022)
- 31 51 Front Axle Transmission/Seal
- 31 51 010 Replacing radial shaft seal for drive flange of front axle transmission (740i xDrive 2017-2022, 750i xDrive 2016-2022)
- 31 51 015 Replace radial shaft seal for left output shaft (740i xDrive 2017-2022, 740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022)
- 31 51 020 Replacing radial shaft seal for output shaft right (740i xDrive 2017-2022, 740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022)
- 31 51 060 Replacing O-ring for right front axle transmission (740i xDrive 2017-2022, 745e xDrive PHEV 2020-2022)
- 31 51 065 Replacing O-ring for bearing block (740i xDrive 2017-2022, 740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022)
- 31 51 600 Replacing both dust plates (drive flange removed) (740i xDrive 2017-2022, 740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022, 750i xDrive 2016-2022, M760i xDrive 2017-2022)
- 31 51 010 Replacing radial shaft seal for drive flange of front axle transmission (740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022)
- 31 51 015 Replace radial shaft seal for left output shaft (750i xDrive 2016-2022, M760i xDrive 2017-2022)
- 31 51 020 Replacing radial shaft seal for output shaft right (750i xDrive 2016-2022, M760i xDrive 2017-2022)
- 31 51 065 Replacing O-ring for bearing block (750i xDrive 2016-2022, M760i xDrive 2017-2022)
- 31 51 010 Replacing radial shaft seal for drive flange of front axle transmission (M760i xDrive 2017-2022)
- 31 53 Differential With Bearings
- 31 60 Output Shaft
- Notes on removing and installing Low Profile band clamps (all 7' series models 2016-2022)
- 31 60 003 Removing and installing/replacing left output shaft (740i xDrive 2017-2022, 740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022)
- 31 60 004 Removing and installing/replacing right output shaft (740i xDrive 2017-2022, 740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022)
- 31 60 535 Replacing two bellows of the output shaft (s) (output shaft (s) removed) (740i xDrive 2017-2022, 740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022, 750i xDrive 2016-2022, M760i xDrive 2017-2022)
- 31 60 003 Removing and installing/replacing left output shaft (750i xDrive 2016-2022, M760i xDrive 2017-2022)
- 31 60 004 Removing and installing/replacing right output shaft (750i xDrive 2016-2022, M760i xDrive 2017-2022)
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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