2021-2023 Audi e-tron Gear Oil Drain Plug Leaking TSB

Audi has released Technical Service Bulletin (TSB) 2076149/1, dated November 27, 2024, to address instances of a gear oil drain plug leaking in certain 2021-2023 Audi e-tron and e-tron Sportback models. This bulletin provides guidance for technicians to diagnose and repair the issue, which can manifest as an Audi e-tron gear oil leak.

Symptoms

Owners of affected Audi e-tron vehicles may observe specific signs indicating a gear oil leak from the rear gearbox. The most common customer complaints include:

• "Leaks detected on the rear underbody, oil stains on the floor."

Workshop technicians have confirmed these observations, identifying the root cause as a "Gear oil drain plug on rear gearbox leaking."

Fault Codes / DTCs

This TSB specifically links the gear oil drain plug leaking condition to the following Diagnostic Trouble Codes (DTCs):

Code	Description
P33E200	Gear oil drain plug leaking
P31D000	Gear oil drain plug leaking

If your vehicle's diagnostic system logs either P33E200 or P31D000, it strongly suggests the presence of a gear oil drain plug leak.

Technical Background

The underlying reason for the gear oil drain plug leaking is identified as corrosion of the oil seal for the rear gear oil drain plug. This corrosion compromises the seal's integrity, leading to the leakage of gear oil.

Repair Procedure Summary

The repair for the Audi e-tron gear oil leak involves a straightforward process to address the corroded drain plug and ensure proper sealing. Technicians are instructed to:

1. Thoroughly clean the area affected by the gear oil leak.
2. Remove the old, corroded gear oil drain plug.
3. Install a new gear oil drain plug.
4. Refill the gearbox with fresh gear oil to the correct level.
5. Apply anti-corrosion wax D 308 SP5 M1 to the newly installed gear oil drain plug to prevent future corrosion and leaks.

Required Tools or Parts

To perform this repair, technicians will need a new gear oil drain plug and anti-corrosion wax D 308 SP5 M1. Standard workshop tools for draining and refilling gear oil will also be necessary.

Warranty Information

For vehicles still under warranty, claims should be submitted in accordance with the Audi Warranty Policies and Procedures Manual. The TSB specifies the following codes for warranty claims:

• Service Number: 3457
• Damage Code: 0050
• Labor Operations:
  • Remove and install cover: 5194 1900
  • Drain and fill up gear oil: 3401 175x
  • Seal oil drain plug: 3457 5299 (10 Time Units)
• Claim Comment: As per TSB 2076149/1

If the vehicle is outside of warranty, this Technical Service Bulletin serves as informational guidance.

NHTSA ID: 11011300