2021 Audi Engine Oil Leak Detection TSB

Symptoms of an Engine Oil Leak

Owners of 2021 Audi vehicles may notice several indicators suggesting an engine oil leak. These symptoms often point to a potential 2021 Audi engine oil leak that requires investigation. Common reports from customers include:

• A distinct smell emanating from the engine compartment, often due to oil burning on hot engine components.
• Visible oil leaks in the front end of the car or within the engine compartment area.
• Oil stains or marks observed on the ground underneath the vehicle when parked.
• A noticeable loss of engine oil, requiring more frequent top-offs than usual.

Workshop technicians examining these vehicles typically confirm the presence of an oil leak within the engine area.

Technical Background: UV Additive for Leak Detection

To accurately pinpoint the source of an engine oil leak, technicians utilize a specialized fluorescent yellow leak search additive. This pigment is designed to mix seamlessly with the engine oil. When exposed to a UV lamp, the additive glows brightly at the exact point of the leak, making even very small leaks visible. This method is effective for both gasoline and diesel engines, and importantly, an oil change is not required after its use, as the additive can safely remain in the engine.

Important Warnings and Notes

Audi has issued specific guidelines regarding this leak detection procedure:

• Engine Cleaning: It is not necessary to clean the engine before applying the UV additive and performing the leak detection steps.
• Application: The UV additive can be used for all combustion engines.
• Transmission Leaks: Do not use this UV additive for locating transmission leaks. It is specifically formulated for engine oil.
• Warranty: This Technical Service Bulletin 17 20 11 2060750/1 is for informational purposes only and is not applicable to any Audi Warranty claims.

Repair Procedure Summary for 2021 Audi Engine Oil Leak Diagnosis

The diagnostic procedure for a suspected 2021 Audi engine oil leak involves two main steps for technicians:

1. Additive Application: Four ounces of leak search additive, part number G 052 940 A1, are added to the engine via the oil filler neck. This quantity is sufficient for up to 1.4 gallons of engine oil. For vehicles with larger oil capacities, the amount of additive should be doubled. Audi confirms there is no risk of damaging the engine if extra additive is introduced.
2. Leak Detection: After the additive has circulated, the engine is run. Technicians then use a UV lamp, such as tool number VAS 231005 (or its equivalent, WVA-074), to scan the engine compartment and locate the fluorescent glow indicating the precise location of the oil leak.

Required Parts and Tools

To perform this diagnostic procedure, technicians will need the following specific items:

• Leak Search Additive: Part Number G 052940A1 (available as shop supply).
• UV Lamp: Tool Number VAS231005 (WVA-074) or an equivalent UV lamp.
• Fasteners: Any necessary fasteners, bolts, nuts, and screws should be referenced in ETKA/ELSA and the relevant Repair Manual.

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Source: NHTSA ID: 10181059