2021 Audi Q7/Q8 Red Steering Warning DTC B200049

Audi has issued Technical Service Bulletin (TSB) 48 22 35 2067555/1, dated July 29, 2022, to address a specific steering system concern affecting certain 2021 Audi Q7, Q8, SQ7, SQ8, and RS Q8 models. This bulletin details a software-related issue that can lead to a 'red steering warning' in the instrument cluster and a reduction in steering assist.

Symptoms

Owners of affected 2021 Audi Q7 and Q8 models may experience the following symptoms:

• The "red steering warning lamp lights up in the instrument cluster."
• "Steering assist is reduced."

Fault Codes / DTCs

When diagnosing this issue, technicians will typically find the following Diagnostic Trouble Code (DTC) stored in the power steering control unit J500 (address 0044):

• DTC: B200049
• Symptom Code: 7353984

Diagnosis and Trigger Conditions

The presence of the "red steering warning" and reduced steering assist, coupled with the logged DTC B200049 in the J500 control unit, confirms the condition. This issue is attributed to a software anomaly within the power steering system.

Repair Procedure Summary

The resolution for the "Audi Q7 Q8 red steering warning" involves a software update to the J500 power steering control unit. The procedure is as follows:

1. Technicians must first follow the instructions outlined in TSB 2011732, which covers the "00 Software Version Management (SVM), operating instructions."
2. Subsequently, the J500 control unit (address 0044) needs to be updated using the SVM action code 44A036.

This update will install the corrected software version to resolve the underlying issue causing the red steering warning and reduced steering assist.

Required Software Updates

The software update involves replacing an older version with a newer one. The specific software details are:

• Old Software Part Number: 4N0909144E
• Old Software Version: 0505
• New Software Part Number (or higher): 4N0909144G
• New Software Version (or higher): 0507
• SVM Code Input: 44A036

Important Warnings for Owners

Owners should be aware that if their vehicle is outside of any applicable warranty, this Technical Service Bulletin is informational only. In such cases, the cost of the repair may not be covered by Audi.

Warranty Information

This repair is generally covered under warranty for vehicles up to 48 months or 50,000 miles. It is also applicable to CPO (Certified Pre-Owned) covered vehicles under claim type G10. The service number for this repair is 4835, with a damage code of 0040. Diagnostic time is recorded as GFF 0150 0000, with a maximum of 50 Technical Units (TU).

All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual and are subject to review by Audi Warranty.

---

Source: NHTSA ID 10216845