2022 BMW iX Taillamp Fault Messages TSB
A technical service bulletin (NHTSA ID 10227567) has been issued for the 2022 BMW iX regarding false 'Rear left light system faulty' and 'Rear right light system faulty' messages. Despite these warnings, the taillamps are fully functional.
Ahmet Topcu2022 BMW iX
Symptoms
Owners of certain 2022 BMW iX vehicles may observe warning messages displayed in the instrument cluster, specifically:
- "Rear left light system faulty"
- "Rear right light system faulty"
Despite these warning messages, the rear lights are typically observed to be operating correctly, with no actual functional defect found.
Fault Codes / DTCs
During a vehicle test, the following diagnostic trouble codes (DTCs) may be stored in relation to the 2022 BMW iX taillamp fault:
| Code | Description | Module / System |
|---|---|---|
| 035BC7 | RLM side panel left: Communication via Body_CAN faulty | Exterior Lighting / Lighting Control Module |
| 035BCB | RLM side panel right: Communication via Body_CAN faulty | Exterior Lighting / Lighting Control Module |
| 035BCC | RLM tailgate left: Communication via Body_CAN faulty | Exterior Lighting / Lighting Control Module |
| 035BCE | RLM tailgate right: Communication via Body_CAN faulty | Exterior Lighting / Lighting Control Module |
| CD1444 | CAN Message, Outside light status rear 1 left (ST_LP_EX_REAR_1_LF): Time-out | Exterior Lighting / Lighting Control Module |
| CD14C5 | CAN Message, Outside light status rear 1 right (ST_LP_EX_REAR_1_RH): Time-out | Exterior Lighting / Lighting Control Module |
Diagnosis and Trigger Conditions
This issue is characterized by the presence of the warning messages and fault codes without any actual malfunction of the rear lighting system. The rear lights will function as intended, indicating that the problem is a communication error or false detection within the vehicle's Body_CAN system, rather than a physical defect in the lights themselves. This points to a software-related anomaly rather than a hardware failure causing the 2022 BMW iX taillamp fault.
Repair Procedure Summary
As indicated by the manufacturer communication (NHTSA ID 10227567), the primary concern is the erroneous display of fault messages and the storage of related DTCs, despite the rear lights functioning correctly. While specific repair steps are not detailed in the summary, such communication faults are typically resolved through software updates to the relevant control modules, particularly the lighting control module. A dealer will diagnose the issue to confirm the false warning and apply any necessary software programming.
Owner Action
If you own a 2022 BMW iX and are experiencing the "Rear left light system faulty" or "Rear right light system faulty" messages, it is recommended to schedule an appointment with your authorized BMW dealer. Inform them about the specific warning messages and mention the NHTSA ID 10227567. The dealer will be able to diagnose the communication fault and perform any required software updates to address the 2022 BMW iX taillamp fault.
Source: NHTSA ID 10227567
Frequently Asked Questions
- What does 'Rear left light system faulty' mean in my 2022 BMW iX?
- This message, along with 'Rear right light system faulty', indicates a detected communication fault within your vehicle's lighting system. According to NHTSA ID 10227567, the rear lights are typically still functional, and the warning is often a false alarm caused by a software issue.
- Will my taillights stop working if I see a 'Rear light system faulty' message?
- No, the manufacturer communication states that despite these messages, the rear lights are observed to be operating correctly and there will be no functional defect found. The issue is primarily a communication error or false warning, not a failure of the lights themselves.
- What fault codes are associated with the 2022 BMW iX taillamp fault?
- Common fault codes include 035BC7, 035BCB, 035BCC, 035BCE, CD1444, and CD14C5. These codes typically point to communication issues within the Body_CAN system related to the rear light modules.
- How can I fix the 'Rear light system faulty' warning on my BMW iX?
- Since this is a software-related communication issue, it requires diagnosis and potential software updates by a certified BMW technician. You should contact your BMW dealer to schedule service and mention the NHTSA ID 10227567.
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