2021-2024 BMW DRL Dim or Discolored (SIB 63 05 23)

If your 2021-2024 BMW X7, XM, or 7 Series is experiencing a BMW DRL dim or discolored issue, you're not alone. BMW has issued Service Information Bulletin (SIB) 63 05 23 to address this concern. This bulletin, which is Revision 2 and replaces the previous SI B63 05 23 dated February 2024, includes an added model to its scope.

Symptoms

Owners may observe that one or more of the LED daytime running lights (DRLs) are dim or discolored. A common manifestation of this issue is when the inner light appears "yellowed". This visual change can affect the overall appearance and functionality of the vehicle's lighting system.

Fault Codes / DTCs

When diagnosing a BMW DRL dim or discolored condition, technicians may find the following defect code:

Code	Description
6312356700	Daytime driving light, LED Discolored

Diagnosis / Trigger Conditions

The root cause of the dim or discolored DRL is a damaged connection between the LED module and the light tube located inside the upper/top headlamp housing. Diagnosis involves a visual inspection of the headlamp and LED module for any signs of discoloration, particularly the "yellowed" appearance mentioned in the bulletin.

Important Warnings

If discoloration is observed during the inspection, the affected upper/top headlamp and the LED module require replacement. Attempting to repair the damaged connection without replacing these components will not resolve the issue.

Repair Procedure Summary

The repair procedure outlined in SIB 63 05 23 involves several steps:

1. Remove the LED Module: The affected LED module must first be carefully removed from the upper/top headlamp.
2. Inspect for Discoloration: Both the upper/top headlamp and the LED module are then inspected for signs of discoloration.
3. Replacement: If discoloration is present, the affected upper/top headlamp and LED module must be replaced. This may involve replacing the top left, top right, or both front light combinations, depending on which DRLs are affected.
4. Programming and Encoding: After the physical replacement, the vehicle requires programming and encoding. This ensures that the vehicle's control modules are updated to the required I-level. Technicians will select applicable open Technical Campaigns (such as those associated with labor operations 00 00 006, 00 00 556, 61 21 528, and 61 00 730) to perform these updates. Additional work procedures, as detailed in SI B01 01 20 or SI B01 07 20, may also be required for proper documentation and claiming of work time.

Required Tools or Parts

Specific part numbers for the LED headlight upper left and/or right, and the LED module for turn signals/daytime driving lights, are not listed directly in the bulletin. Technicians are instructed to refer to ETK/AIR (Electronic Parts Catalog / Aftersales Information Research) and use the vehicle's VIN/chassis number to determine the correct part numbers based on the specific equipment and options fitted to the vehicle.

Owner Action

If you notice your 2021-2024 BMW's daytime running lights are dim or discolored, or if you see a "yellowed" inner light, it is recommended to schedule an appointment with an authorized BMW dealership. The issue is covered under the terms of the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks.

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Source: NHTSA ID 10252280