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BMW 930949

Knee airbag, driver: short circuit to negative terminal

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a BMW dealer or qualified service provider for diagnosis of the restraint-system warning and ACSM fault code 930949.
Confidence97%

Quick answer

BMW fault code 930949 means: “Knee airbag, driver: short circuit to negative terminal.” Verified evidence links it to a restraint-system check-control message and a permanently illuminated red airbag warning light.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

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1. What does 930949 mean?

BMW fault code 930949 means: “Knee airbag, driver: short circuit to negative terminal.” Verified evidence links it to a restraint-system check-control message and a permanently illuminated red airbag warning light.

2. Technical explanation

For the verified application, this fault is stored in the ACSM (airbag control unit). BMW’s cited manufacturer communication identifies 930949 as a driver knee-airbag circuit fault described as a short circuit to the negative terminal.

3. What system is affected?

Driver knee airbag / ACSM (airbag control unit) restraint system.

4. How serious is this code?

Not yet established by verified evidence. However, the verified source states that the red airbag warning light remains illuminated.

5. Symptoms you may notice

  • A restraint-system check-control message appears.
  • The red airbag warning light in the instrument cluster lights up permanently.
  • Fault code 930949 is stored in the ACSM (airbag control unit).

6. Possible causes

  • Verified evidence identifies the stored fault as a driver knee-airbag short circuit to the negative terminal. The underlying component-level cause is not yet established by verified evidence.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

Not yet established by verified evidence.

9. What you can safely do

  • Arrange diagnosis by a qualified BMW service provider or other suitably qualified restraint-system technician.
  • Do not attempt airbag-system or wiring repairs based on this information.

10. Step-by-step troubleshooting

  1. Have the ACSM fault memory and restraint system diagnosed using appropriate BMW diagnostic procedures.
  2. Further troubleshooting steps are not yet established by verified evidence.

11. When to contact service

Contact a BMW dealer or qualified service provider for diagnosis of the restraint-system warning and ACSM fault code 930949.

12. What the service center may check

  • Confirm the restraint-system check-control message and permanently illuminated red airbag warning light.
  • Read and document ACSM fault code 930949.
  • Follow the applicable BMW service information for the vehicle.

13. Possible repair or resolution

  • The repair resolution is not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA Manufacturer Communication 10227929, BMW bulletin B652022, published November 1, 2022. It covers a restraint-system check-control message and permanently illuminated red airbag warning light when ACSM code 930949, among several listed codes, is stored.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified official source: NHTSA Manufacturer Communication 10227929, BMW bulletin B652022: https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2020-2024.zip#nhtsa_id=10227929

19. Frequently asked questions

What does BMW code 930949 mean?

It means “Knee airbag, driver: short circuit to negative terminal.”

What warning signs are associated with code 930949?

The verified BMW communication states that a restraint-system check-control message appears and the red airbag warning light remains illuminated.

Which vehicle application is verified?

BMW i4, model year 2022, United States. Broader applicability is not yet established by verified evidence.

Can the vehicle be driven or charged with this fault?

Not yet established by verified evidence.

20. Sources & verification

Verified
BMW 930949: Knee airbag, driver: short circuit to negative terminal | EV Diagnostics