2021-2026 Audi Oil Leak Detection Technical Service Bulletin

Audi has released Technical Service Bulletin (TSB) 2060750/4, effective August 1, 2025, to provide a standardized method for diagnosing engine oil leaks. This TSB is crucial for addressing customer complaints related to oil consumption, engine compartment contamination, or visible oil leaks. While the TSB specifically applies to Audi vehicles with combustion engines, the NHTSA database links this 2021 Audi e-tron manufacturer_communication to a wide range of models, including the 2021 Audi e-tron, from model years 2021 through 2026.

Symptoms

Owners of affected Audi models may notice several indicators of an engine oil leak. These symptoms often include:

• Visible oil leaks in the area of the front end or engine compartment.
• Contamination with oil within the engine bay.
• Increased engine oil consumption, requiring frequent top-offs.

These issues can stem from various parts of the lubrication system, such as the cylinder head, valvetrain, or oil pan. This 2021 Audi e-tron manufacturer_communication aims to provide a clear diagnostic path for these concerns.

Diagnosis / Trigger Conditions

This Technical Service Bulletin outlines a method using a fluorescent yellow UV leak search additive to pinpoint the exact source of an oil leak. The additive mixes with the engine oil and becomes visible under a UV lamp, glowing fluorescent yellow at the leak point. This technique is effective for both small and large leaks, with larger leaks potentially visible even at idle speed. For very small leaks, a test drive might be necessary to reproduce the condition. The additive is safe for both gasoline and diesel engines and does not require an oil change after use.

Repair Procedure Summary

The diagnostic procedure involves two main steps for technicians:

1. Add UV Leak Additive: 10 mL of the search additive G 052 940 A1 is added to the engine via the oil filler neck. This quantity is sufficient for up to 5 quarts of engine oil. For larger oil capacities, the amount should be doubled. Adding extra additive does not pose a risk of engine damage.
2. Locate Leak: The engine is then run, and a UV lamp (VAS231005 or equivalent) is used to scan for fluorescent yellow glow, indicating the precise location of the oil leak. Engine cleaning before this procedure is not necessary.

It is important to note that the UV leak detection additive G 052 940 A1 is specifically for engine oil leaks and is not approved for use in gearboxes.

Required Tools and Parts

To perform the oil leak detection, the following specific items are required:

• Part Number G 052940A1: Leak search additive (10 mL quantity).
• Tool Number VAS231005 (WVA-074) or equivalent: UV lamp.
• Fasteners, Bolts, Nuts, and Screws: As needed, referencing ETKA/ELSA and the repair manual for specific requirements.

Warranty claims for this procedure, if applicable, should follow Audi Warranty Policies and Procedures Manual, using Service Number 1701 and Damage Code 0055, with Labor Operations 1001 2952 (20 TU) for cleaning the engine.

Owner Action

If you are experiencing symptoms of an engine oil leak, such as visible oil spots or increased oil consumption, it is recommended to schedule an appointment with an authorized Audi service center. While this TSB is primarily informational for vehicles outside of warranty, it provides the official diagnostic procedure for technicians. Be aware that this 2021 Audi e-tron manufacturer_communication is slated for release on August 1, 2025, so service centers may not yet be implementing this specific procedure until that date.

Source: NHTSA ID 11022633