Important!
This replacement procedure can be used for:
BMW 5 Saloon (E39) 520 d, BMW 5 Saloon (E39) 525 d, BMW 5 Saloon (E39) 530 d View more

The steps may slightly vary depending on the car design.

This video shows the replacement procedure of a similar car part on another vehicle

All the parts you need to replace – Mass Air Flow Sensor for 5 Saloon (E39) and other BMW models
Tools
Replacement: mass air flow sensor – BMW 5 (E39). List of the tools you'll need:
Electronic spray
Torque wrench
Drive socket # 12
HEX bit No.H5
Torx bit T25
Torx bit T30
Ratchet wrench
Microfibre towel
Fender cover
Replacement: mass air flow sensor – BMW 5 (E39). AUTODOC experts recommend:
  • Сlear the trouble codes from the electronic control unit if necessary.
  • Make sure that no dust or dirt gets into the air duct components and the throttle body.
  • Please note: all work on the car – BMW 5 (E39) – should be done with the engine switched off.
Carry out replacement in the following order:
  1. Step 1
    Open the bonnet.
    Step 2
    Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
    Step 3
    How to change Mass Air Flow Sensor on BMW E39 1995 - free PDF and video manuals
    Unscrew the engine cover fastener. Use HEX No.H5. Use a ratchet wrench.
  2. Step 4
    How to replace BMW 5 Saloon (E39) 523 i 1996 Mass Air Flow Sensor - step-by-step manuals and video guides
    Remove the engine cover.
    AUTODOC recommends:
    Replacement: mass air flow sensor – BMW 5 (E39). Do not use excessive force when removing the part as this may damage it.
  3. Step 5
    BMW E39 530d 3.0 1997 Mass Air Flow Sensor replacement: free workshop manuals
    Unscrew the fasteners of the air distribution housing assembly. Use a drive socket #12. Use a ratchet wrench.
  4. Step 6
    Changing Mass Air Flow Sensor on BMW 5 Saloon (E39) 520 i 1998 by yourself
    Remove the air distribution housing assembly.
  5. Step 7
    How to remove BMW 5 SERIES 525 tds 1999 Mass Air Flow Sensor - online easy-to-follow instructions
    Release the cabin filter cover clips.
  6. Step 8
    How to replace Mass Air Flow Sensor on BMW 5 Saloon (E39) 2000: download PDF manuals and video instructions
    Remove the cabin filter cover.
  7. Step 9
    How hard is it to do yourself: Mass Air Flow Sensor replacement on BMW E39 525i 2.5 2001 - download illustrated guide
    Remove the cabin filter.
    Replacement: mass air flow sensor – BMW 5 (E39). Tip from AUTODOC:
    Do not attempt to clean and reuse the filter - it will affect the quality of air cleaning inside the car.
  8. Step 10
    Need to know how to renew Mass Air Flow Sensor on BMW 5 SERIES 2002? This free workshop manual will help you to do it yourself
    Unscrew the fasteners of the cabin filter housing. Use Torx T30. Use a ratchet wrench.
  9. Step 11
    Changing of Mass Air Flow Sensor on BMW E39 2003 won't be an issue if you follow this illustrated step-by-step guide
    Remove the cabin filter housing.
  10. Step 12
    BMW 5 SERIES 540 i Mass Air Flow Sensor replacement: online guides and video tutorials
    Unscrew the engine cover fastener. Use HEX No.H5. Use a ratchet wrench.
  11. Step 13
    Replacing Mass Air Flow Sensor on BMW E39 1996 523 i by yourself
    Remove the engine cover.
    AUTODOC recommends:
    Replacement: mass air flow sensor – BMW 5 (E39). To avoid damaging the part when removing it, do not use excessive force.
  12. Step 14
    Remove the air distribution housing assembly.
    Step 15
    5 Saloon (E39) 525 tds 1997 Mass Air Flow Sensor DIY replacement workshop manual
    Remove the filter element from the filter housing.
  13. Step 16
    How to change Mass Air Flow Sensor on BMW 5 Saloon (E39) 1998 - tips and tricks
    Unscrew the fasteners that connect the air duct to the MAF sensor. Use HEX No.H5. Use a ratchet wrench.
  14. Step 17
    Step-by-step recommendations for DIY replacement BMW E39 1999 525 tds Mass Air Flow Sensor
    Remove the air duct.
  15. Step 18
    DIY replacement of Mass Air Flow Sensor on BMW 5 Saloon (E39) 528 i 2000 is not an issue anymore with our step-by-step tutorial
    Cover the air intake hose with a microfibre towel to prevent dust and dirt from getting into the system.
  16. Step 19
    How to change Mass Air Flow Sensor on BMW E39 1995 - free PDF and video manuals
    Detach the mass air flow sensor connector.
  17. Step 20
    How to replace BMW 5 Saloon (E39) 523 i 1996 Mass Air Flow Sensor - step-by-step manuals and video guides
    Unscrew the MAF sensor fasteners. Use Torx T25. Use a ratchet wrench.
  18. Step 21
    BMW E39 530d 3.0 1997 Mass Air Flow Sensor replacement: free workshop manuals
    Remove the mass air flow sensor.
  19. Step 22
    Changing Mass Air Flow Sensor on BMW 5 Saloon (E39) 520 i 1998 by yourself
    Install a new mass air flow sensor.
  20. Step 23
    How to remove BMW 5 SERIES 525 tds 1999 Mass Air Flow Sensor - online easy-to-follow instructions
    Tighten the MAF sensor fasteners. Use Torx T25. Use a torque wrench. Tighten it to 8 Nm torque.
  21. Step 24
    Remove the microfibre towel from the air intake hose.
    Step 25
    How to replace Mass Air Flow Sensor on BMW 5 Saloon (E39) 2000: download PDF manuals and video instructions
    Install the air duct.
  22. Step 26
    How hard is it to do yourself: Mass Air Flow Sensor replacement on BMW E39 525i 2.5 2001 - download illustrated guide
    Tighten the fasteners that connect the air duct to the MAF sensor. Use HEX No.H5. Use a torque wrench. Tighten it to 5 Nm torque.
  23. Step 27
    Need to know how to renew Mass Air Flow Sensor on BMW 5 SERIES 2002? This free workshop manual will help you to do it yourself
    Treat the mass air flow sensor connector. Use dielectric grease.
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DIY BMW 5 Saloon (E39) Mass Air Flow Sensor replacement - online guide
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