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BMW Rear left light system faulty

Rear left light system faulty

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a BMW authorized service center and provide the message “Rear left light system faulty” and any stored diagnostic results.
Confidence90%

Quick answer

For certain US-market 2022 BMW iX vehicles produced before March 2022, BMW bulletin SI B63 06 22 documents the Check Control message 2052: “Rear left light system faulty.”

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 Rear left light system faulty mean?

For certain US-market 2022 BMW iX vehicles produced before March 2022, BMW bulletin SI B63 06 22 documents the Check Control message 2052: “Rear left light system faulty.”

2. Technical explanation

BMW’s bulletin describes a taillamp Check Control message displayed in the Central Information Display (CID). During a Vehicle Test, the bulletin identifies rear light module (RLM) communication faults via the Body_CAN. The supplied evidence does not establish a user-performed diagnosis or repair procedure.

3. What system is affected?

Rear taillamp / rear light module communication system (RLM) via Body_CAN.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • Check Control message 2052: “Rear left light system faulty” displayed in the CID.
  • The bulletin also documents message 2053: “Rear right light system faulty.”

6. Possible causes

  • For the covered vehicles, BMW documents Body_CAN communication faults involving rear light modules during a Vehicle Test.
  • The verified evidence does not establish a more specific root cause.

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 an authorized BMW service center or qualified technician.
  • Document the exact Check Control message and when it occurs.
  • Do not attempt electrical or high-voltage repairs based on this information.

10. Step-by-step troubleshooting

  1. A technician can perform a Vehicle Test and check for the BMW-documented rear light module communication fault codes.
  2. No owner-performed troubleshooting steps are established by the supplied verified evidence.

11. When to contact service

Contact a BMW authorized service center and provide the message “Rear left light system faulty” and any stored diagnostic results.

12. What the service center may check

  • Perform a Vehicle Test.
  • Check for fault code 035BC7: RLM side panel left — Communication via Body_CAN faulty.
  • Check for fault code 035BCB: RLM side panel right — Communication via Body_CAN faulty.
  • Check for fault code 035BCC: RLM tailgate left — Communication via Body_CAN faulty.
  • Check for fault code 035BCE: RLM tailgate right — Communication via Body_CAN faulty.

13. Possible repair or resolution

  • Not yet established by verified evidence. The supplied bulletin summary states that its procedure section was updated, but does not provide the procedure details.

14. Affected vehicles

15. Related TSBs / service bulletins

  • BMW Service Information Bulletin SI B63 06 22, “Taillamp Check Control Message Displayed in the CID.”
  • NHTSA Manufacturer Communication 10227567, published October 1, 2022.
  • NHTSA Manufacturer Communication 10242524, Revision 1, published August 1, 2023; it replaces the October 2022 version of SI B63 06 22.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified official source: NHTSA Manufacturer Communication 10242524 (BMW SI B63 06 22 Revision 1), https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2020-2024.zip#nhtsa_id=10242524

19. Frequently asked questions

Which vehicles are covered by the verified BMW bulletin?

The bulletin identifies the BMW iX (I20) Sports Activity Vehicle produced before March 2022. The supplied applicability evidence lists US-market 2022–2023 BMW iX vehicles, while the bulletin’s production-date condition is before March 2022.

What fault codes can be stored with this message?

BMW documents 035BC7, 035BCB, 035BCC, and 035BCE, all described as rear light module communication faults via Body_CAN.

Does this evidence confirm that the vehicle is safe to drive or charge?

No. Drive and charging status are not established by the supplied verified evidence.

20. Sources & verification

Verified
BMW Rear left light system faulty: Rear left light system faulty | EV Diagnostics