2022-2023 Audi e-tron GT Brake Pedal Vibration TSB

Owners of 2022-2023 Audi e-tron GT and RS e-tron GT models may experience an Audi e-tron GT brake pedal vibration or an unusual pedal feel during low-speed braking. This condition is detailed in Audi Technical Service Bulletin (TSB) 2068205/2, which supersedes an earlier bulletin, 47 22-19, dated October 10, 2022.

Symptoms

If you own a 2022-2023 Audi e-tron GT or RS e-tron GT, you might notice specific symptoms related to the braking system. During braking at low speeds, you may feel a "vibration/pulsation is felt at the brake pedal" and/or the "brake pedal feels 'different'". This Audi e-tron GT brake pedal vibration can be a cause for concern and indicates a need for inspection.

Fault Codes / DTCs

When diagnosing this issue, a technician may find a specific Diagnostic Trouble Code (DTC) stored in the ABS/ESC Control Module -J104-.

Code	Description	Module
P05FF00	Brake pressure sensor / Sensor for brake pedal travel deviation	ABS/ESC Control Module -J104-

Diagnosis and Trigger Conditions

To accurately diagnose the Audi e-tron GT brake pedal vibration, technicians will begin by reading the measured value for "Adaption value offset wheel brake stiffness" and uploading this log to GFF Paperless. This measurement helps determine the extent of the issue within the braking system.

Repair Procedure Summary

The repair procedure outlined in TSB 2068205/2 depends on the measured value of the "Adaption value offset wheel brake stiffness":

1. Measure and Evaluate: The first step involves measuring the "Adaption value offset wheel brake stiffness." This value is crucial for determining the appropriate repair path.
2. Conditional Component Replacement:
   • If the measured value is above 5mm, the J104 ABS control unit must be replaced. Following the replacement, the brake system needs to be fully bled according to the ELSA workshop manual instructions for Chassis, Brake System, Hydraulic Components, and Hydraulic System Bleeding.
   • If the measured value is below 5mm, only a full bleed of the brake system is required.
3. Clear Fault Codes: After the necessary repairs, any stored DTCs in the J104 ABS/ESC control unit are cleared.
4. Re-evaluation: The vehicle is then re-evaluated to ensure the vibration and unusual brake pedal feel have been resolved. If the complaint persists, the bleed procedure is repeated.

Important Warnings

For any complaints specifically related to noise, it is important to upload a video or audio file to DOC-IT, along with the vehicle's VIN number. This additional information can assist technicians in accurately diagnosing and resolving the issue.

Required Parts and Tools

Technicians should always consult their Parts Department and/or ETKA for the most current information regarding parts and bulletins. If the J104 ABS control unit needs replacement, a new hydraulic unit (quantity 01) will be required. Additionally, fasteners, bolts, nuts, and screws may be needed as per the repair manual.

Warranty Information

This repair is covered under warranty for vehicles up to 48 months or 50,000 miles, whichever comes first. If your vehicle falls outside of this warranty period, this Technical Service Bulletin serves as informational guidance only, and costs may apply. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual and are subject to review or audit by Audi Warranty.

NHTSA ID: 10226851