2021-2023 BMW X6/X7 Electric Door Sunshade LIN Faults
BMW has issued a Technical Service Bulletin (TSB 10218372) for 2021-2023 X6 and X7 models regarding electric door sunshade malfunctions. Owners may see fault codes like D90D81, D90D84, 8049B2, 8049B6, 8049B3, and 8049B7 related to LIN communication or jammed buttons.
Ahmet Topcu2021 BMW X7
Also applies to
- BMW X6
- 2021–2022
- BMW X7
- 2022–2023
Owners of 2021-2023 BMW X6 and X7 models may encounter issues with their electric door sunshades. These malfunctions can trigger specific fault codes stored in the vehicle's Body Domain Controller (BDC) fault memory. This article details the symptoms and potential causes for a BMW X7 sunshade fault, as outlined in BMW Technical Service Bulletin (TSB) 10218372.
This TSB, identified as NHTSA ID 10218372, addresses various LIN (Local Interconnect Network) communication issues and mechanical problems that can affect the operation of the rear electric door sunshades in affected vehicles.
Symptoms
Owners might notice that their electric door sunshades are not operating correctly. While the TSB does not specify dashboard warnings, the presence of fault codes in the BDC fault memory indicates an underlying issue. These problems can manifest as the sunshade failing to deploy, retract, or respond to controls.
Fault Codes / DTCs
The following Diagnostic Trouble Codes (DTCs) may be stored in the BDC fault memory, indicating a BMW X7 sunshade fault or a similar issue in the X6:
| Code | Description | Module |
|---|---|---|
| D90D81 | Sunblind rear driver (LIN): Missing LIN-slave | BDC |
| D90D84 | Sunblind rear passenger (LIN): Missing LIN-slave | BDC |
| 8049B2 | Sunblind rear driver (LIN): Line interruption | BDC |
| 8049B6 | Sunblind rear passenger (LIN): Line interruption | BDC |
| 8049B3 | Sunblind rear driver (LIN): Button jammed | BDC |
| 8049B7 | Sunblind rear passenger (LIN): Button jammed | BDC |
Diagnosis and Trigger Conditions
The TSB indicates that these electric door sunshade issues, including missing LIN-slaves, line interruptions, or jammed buttons, may stem from "Possible misuse of the electric door sunshade(s)". This suggests that improper handling or operation of the sunshades could lead to the observed faults.
What Owners Should Know
If you are experiencing a BMW X7 sunshade fault or similar issues with your X6, it's important to understand the potential causes. The TSB highlights that these problems might not always be due to a component failure but could be related to how the sunshades are used. While the TSB summary does not detail a specific repair procedure, identifying the fault codes is the first step in diagnosis.
Owner Action
If your 2021-2023 BMW X6 or X7 is exhibiting electric door sunshade problems, and you suspect a BMW X7 sunshade fault, it is recommended to have your vehicle inspected by an authorized BMW service center. They can perform a diagnostic scan to retrieve any stored fault codes from the BDC module and determine the appropriate course of action based on the specific DTCs present.
Source: NHTSA ID: 10218372
Frequently Asked Questions
- What does a 'Missing LIN-slave' fault mean for my BMW electric sunshade?
- A 'Missing LIN-slave' fault, such as D90D81 or D90D84, indicates that the Body Domain Controller (BDC) is not detecting communication from the electric door sunshade module. This can prevent the sunshade from operating correctly.
- Why might my BMW X7 electric door sunshade button be jammed?
- Fault codes like 8049B3 or 8049B7, indicating a 'Button jammed' condition for the electric door sunshade, suggest a mechanical issue with the control button. The TSB notes that 'Possible misuse of the electric door sunshade(s)' could contribute to such problems.
- What should I do if my 2021-2023 BMW X6 or X7 electric sunshade is not working?
- If your electric door sunshade is malfunctioning, it is advisable to take your 2021-2023 BMW X6 or X7 to an authorized BMW service center. They can diagnose the issue by checking for fault codes like those mentioned in TSB 10218372 and recommend the necessary repairs.
- Are electric door sunshade faults covered under warranty for BMW X6/X7?
- While the TSB does not specify warranty coverage, issues related to manufacturing defects or component failures are typically covered under the vehicle's new car limited warranty. However, if the fault is determined to be caused by 'misuse,' coverage may vary. Consult your BMW dealer for specific warranty information.
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