Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Wind Deflector Guide Stem Broken (SI B54 04 22)
Reference number: SI B54 04 22
WIND DEFLECTOR GUIDE STEM BROKEN
TECHNICAL SERVICE BULLETIN
| BMW: | G23 4 Series Convertible; G83 M4 Convertible; 387 Convertible Wind Deflector, standard equipment |
SITUATION
It is possible that the guide stem (aka rotational axis) on the wind deflector can break upon removal and/or during installation.
CAUSE
Possible misuse of the wind deflector.
CORRECTION
Replace the broken wind deflector guide stem.
Wind deflector in its folded condition (for storing), with the unbroken guide stems seen at left.
PROCEDURE
Verify that a one or both wind deflector guide stem is broken. If yes, then.
- Remove wind deflector and replace the guide stem per the repair instructions listed in AIR/ISTA (54 34 393).
PARTS INFORMATION
Obtain and confirm the part numbers for your specific vehicle by entering the chassis number in either ETK or AIR which takes into account specific equipment and/or options.
| Part Number | Description | Quantity |
|---|---|---|
| 54 34 7 488 320 | Rotational axis for wind deflector | As needed |
CLAIM INFORMATION
This Service Information bulletin provides technical and repair-related information.
Damage and/or issues caused by outside influences are not covered under the BMW limited warranties.
Eligible and Covered Work/Repairs
When used to repair a verified defect in materials or workmanship, the information provided in this bulletin is covered under the terms of the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks.
To submit a claim, please follow the established and applicable warranty policy and procedures (Labor/Part/Sublet) that apply to the repair being performed.
Refer to AIR for the corresponding Defect Code, flat rate labor operations (including the diagnosis that applies*) and the flat rate unit (FRU) allowances.
Only one Main labor operation code can be claimed per repair visit.
*Based on which one applies to your center, please refer to SI B01 01 20 or B01 07 20 for the applicable procedure for documenting, claiming, and explaining, on the RO and in the claim comments, your diagnosis work time (WT), job/repair work time (WT), and the vehicle repairs your center performed, unless otherwise required by State law.
FEEDBACK REGARDING THIS BULLETIN
| Technical Feedback | To submit feedback for the technical topics of this bulletin: Submit your feedback in the rating box at the top of this bulletin |
| Warranty Feedback | To submit feedback for the CLAIMS section of this bulletin: Submit an IDS ticket to the Warranty Department, or use the chat available in the Warranty Documentation Portal |
| Parts Feedback | To submit feedback for the PARTS section of this bulletin: Submit an IDS ticket to the Parts Department |
NO RELATED
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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.