2012 BMW X3 28iFACTORY OEM SERVICE PROCEDURE

72 11... Checklist for front seat

Event Check Action
Has at least one belt tensioner and/or one side airbag been activated? Yes  Check 1 (when installed): 
Check all seat adjustment options of both front seats.
There must be no stiff movement, sticking or other functional problems or noises across the entire adjustment range of all the seat adjustment options.
Check head restraints for damage.
Check crash-active headrest for activation.
Only 2-door model: 
Check backrest lock. Backrest must unlock and lock easily without any great physical effort.		 If components are OK with regard to checks 1 and 2, only replace activated belt tensioner or side airbag.
Otherwise, replace faulty parts on the seat/body.
Replace belt tensioner, seat belt and, if necessary, side airbag.
Check 2 (when dismounted): 
Check for deformation/damage on the following components:
  1. All seat cross members on the body
  2. Threaded support sleeves in the seat cross members
  3. End fittings on the seat mechanism.

Check for visible damage or deformation.
No  Check all adjustment options of the head restraints.
Check crash-active headrest for activation.		 Replace faulty parts.
Only seat with integrated seat belt: 
Does the backrest indicator light turn on when the backrest is locked and also when the backrest is shaken? Yes  Check microswitch of backrest lock and renew if necessary. Check electrical lines and repair if necessary. If there is still a fault, replace the entire seat
No  No further action necessary.  
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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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