2022-2023 Audi Engine Replacement Debris Check TSB

Audi has released Technical Service Bulletin (TSB) 10 21 22 2018288/9 to address a critical procedure during engine replacement. This bulletin, applicable to many 2022-2023 Audi models with combustion engines, emphasizes the importance of checking for and removing metal debris from transferred assemblies.

Why This Matters

When an engine experiences a significant mechanical failure, small pieces of metal debris can be scattered and lodged within various connected components. These include the intake manifold, air intake hoses, exhaust manifolds, exhaust down-pipes, turbocharger, supercharger, and intercooler. If these debris pieces are not meticulously removed before a new replacement engine is installed, they pose a serious risk.

Once the new engine is running, this hidden metal debris can be drawn into the combustion chamber. This can lead to a distinct "knocking noise" and cause severe, premature damage to the newly installed engine. Ensuring a thorough Audi engine debris check is crucial for the longevity and performance of the replacement unit.

Symptoms

Owners might notice a "knocking noise" from the engine shortly after an engine replacement if this issue occurs. Ultimately, the presence of debris can lead to "serious engine damage" to the new engine.

Diagnosis / Trigger Conditions

This TSB is relevant whenever an engine is being replaced due to a prior mechanical problem. The key trigger condition is the installation of a replacement engine, particularly after a failure that could have generated metal fragments. Technicians must perform an Audi engine debris check as part of the engine replacement process.

Repair Procedure Summary

Before installing a replacement engine, technicians must perform a comprehensive inspection and cleaning of all assemblies that will be transferred from the old engine to the new one. This includes, but is not limited to, the intake manifold, air intake hoses, exhaust manifolds, exhaust down-pipes, turbocharger, supercharger, and intercooler.

For components like the intake manifold, especially those with two-stage or variable designs, internal inspection for debris is critical. If any debris is found in the intake manifold or cylinder head ports, the intake manifold must be replaced entirely. This is because cleaning the internal intake paths cannot be 100% guaranteed, and lodged debris could later dislodge and damage the new engine. The decision to replace the intake manifold depends on the extent of mechanical damage observed.

Important Warnings

• Warranty Exclusion: Audi explicitly states that "Engine damage caused by failure to clean debris from assemblies that are transferred to a replacement engine is not covered by Warranty." This highlights the critical importance of adhering to the inspection and cleaning procedure.
• Electric Vehicles: This Technical Service Bulletin "does not apply to all-electric vehicles," as the issue is specific to combustion engines.

Owner Action

If your Audi vehicle requires an engine replacement, it is important to ensure your service center is aware of and follows this Technical Service Bulletin. Discuss with your technician the procedures they will follow to perform a thorough Audi engine debris check on all transferred components to prevent future issues with your new engine.

TSB Revision History

This TSB has undergone several revisions:

• Revision 9 (May 13, 2021): Revised header (Added model year).
• Revision 8 (May 6, 2019): Revised header (Added model years).
• Revision 7 (May 31, 2018): Revised header (Added model years) and revised condition (added note).

This bulletin supersedes Technical Service Bulletin Group 10 number 19-15 dated May 6, 2019.