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E90/E91/E92/E93; N43/N45/N46/N51; GS6-17BG/DG gearbox — BMW

E90/E91/E92/E93; N43/N45/N46/N51; GS6-17BG/DG gearbox on BMW: 63 steps, engines N43B16A, N43B20A, N45B16A, N45B20A.

Workshop procedure for BMW — the exact step sequence and torque figures, straight from real workshop data.

63 steps 7 engine codes

🔧 Engine codes this applies to

N43B16AN43B20AN45B16AN45B20AN46B20BN46B20TU2OLN51B30A

📐 25 workshop diagrams for N43B16A

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

E90/E91/E92/E93; N43/N45/N46/N51; GS6-17BG/DG gearbox — N43B16A · diagram 1
E90/E91/E92/E93; N43/N45/N46/N51; GS6-17BG/DG gearbox — N43B16A · diagram 2
E90/E91/E92/E93; N43/N45/N46/N51; GS6-17BG/DG gearbox — N43B16A · diagram 3
E90/E91/E92/E93; N43/N45/N46/N51; GS6-17BG/DG gearbox — N43B16A · diagram 4
E90/E91/E92/E93; N43/N45/N46/N51; GS6-17BG/DG gearbox — N43B16A · diagram 5
E90/E91/E92/E93; N43/N45/N46/N51; GS6-17BG/DG gearbox — N43B16A · diagram 6
E90/E91/E92/E93; N43/N45/N46/N51; GS6-17BG/DG gearbox — N43B16A · diagram 7
E90/E91/E92/E93; N43/N45/N46/N51; GS6-17BG/DG gearbox — N43B16A · diagram 8
+ 17 more diagrams
🔒 25 workshop diagrams for this job Ask about your BMW N43B16A — free or sign up free to see the drawings

📋 Procedure

  1. Installation is in the reverse order of removal
  2. Aluminium screws/bolts must be used for a magnesium crankcase
  3. Remove the underbody cover
  4. Disconnect the exhaust pipes from the manifold
  5. Disconnect the rear exhaust mounts
N43B16A? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Remove the exhaust pipe bracket(s)
  2. Remove the exhaust pipes
  3. Remove the heat shield(s)
  4. Disconnect the gearbox wiring
  5. Unclip the wiring from the gearbox
  6. Remove the engine/gearbox lower attaching bolts
  7. Remove the flywheel inspection cover plate
  8. Disconnect the cables from the gearbox bracket
  9. Disconnect the reversing light switch from the gearbox
  10. Disconnect the propeller shaft from the gearbox
  11. Remove the propeller shaft middle support
  12. Disconnect the propeller bearing
  13. Gearbox support:
  14. Do not damage the rubber boot
  15. Steel
  16. Aluminium
  17. Cross member:
  18. Clutch slave cylinder:
  19. Propeller shaft middle support
  20. Use a special tool:
  21. Caution! Safety straps MUST be used
  22. Remove the cross member
  23. Remove the clutch slave cylinder
  24. Note: Do not disconnect the hydraulic lines
  25. Secure to the vehicle
  26. Gear-shift control:
  27. Remove the locking pin
  28. Disconnect the gear-shift rod from the gearbox
  29. Disconnect the gear selector lever
  30. Remove the gear-shift control bracket
  31. Remove the engine/gearbox attaching bolts
  32. Lower the gearbox slightly
  33. Remove the gearbox
Workshop diagrams

Ask TorqFix about your BMW N43B16A — it answers with the exact sequence for that engine and the workshop drawing for each step. First question is free after a 20-second sign-up, no card.

Ask about your BMW N43B16A — free → or sign up free to see the drawings

Other BMW procedures

Who makes these pages, and how

TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.

The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.

Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.

Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com

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Workshop data on this page last updated 20 Sep 2026.