2021-2024 Audi V6 TFSI Coolant Pump Leak TSB

Symptoms of Coolant Loss

Owners of affected 2021-2024 Audi models with a V6 TFSI engine may notice one or both of the following symptoms:

• "Coolant loss/leak"
• "Coolant warning lamp" illumination on the dashboard

If you observe these signs, it indicates a potential issue with the coolant system, often originating from the coolant pump.

Important Note on Normal Operation

Audi Technical Service Bulletin 19 23 45 2070349/2 clarifies that not all traces of coolant indicate a fault. A small quantity of coolant, up to 3 ml, may escape over 100 hours of operation due to the lubrication and cooling of the seal. This is considered normal and does not warrant a complaint or repair.

Affected V6 TFSI Engines and Production Solutions

Audi implemented production countermeasures to address the coolant pump issue. Vehicles manufactured after specific dates may have the updated component. The dates are as follows:

• SQ5: March 19, 2022
• Q7/Q8: November 30, 2021
• S6/S7/A6/A7: November 30, 2021
• S4/S5/RS5: November 19, 2021
• A8: November 17, 2021

Diagnosing an Audi V6 TFSI Coolant Pump Leak

To accurately diagnose an Audi V6 TFSI coolant pump leak, technicians follow a precise procedure. This involves thoroughly cleaning and drying the suspected leak area and any coolant traces. The cooling system is then filled to its maximum level.

A visual inspection is performed at both idle and engine speeds up to 2500 rpm to check for leaks. The cooling system is also checked for leaks according to the detailed steps in the Workshop Manual. Finally, the vacuum line from the water pump is removed and inspected for coolant leaks before reassessing the overall system.

Repair Procedure Summary

After diagnosis, the repair procedure outlined in TSB 19 23 45 2070349/2 depends on when the vehicle was produced relative to the production solution implementation dates:

• If no further coolant leak is detected: The vehicle should be observed without replacing any parts.
• If a coolant leak is detected and the vehicle production date is after the solution implementation date: Technicians must contact Audi's Technical Assistance Center (TAC) for additional guidance before proceeding with any repairs.
• If a coolant leak is detected and the vehicle production date is before the solution implementation date: The coolant pump, which is the suspected source of the leak, must be replaced. Any components connected to the vacuum system that show signs of coolant ingress should also be replaced.

Warranty Information

This Technical Service Bulletin (TSB) applies to vehicles covered under the 110 Up to 48 Months/50,000 Miles warranty. For Certified Pre-Owned (CPO) vehicles, the G10 claim type applies, requiring owner verification. If the vehicle is outside of its warranty period, this TSB serves as informational guidance only.

Associated service numbers and damage codes for this issue include Service Number 1950 and Damage Code 0050. Relevant labor operations for this Audi V6 TFSI coolant pump leak include:

• Remove and install noise insulation: 1082 19XX
• Check and top up coolant, clean, and perform visual check: 1938 3599
• Check cooling system for leaks: 1901 0150
• Remove and install coolant pump (Only if Faulty): 1950 19XX

Diagnostic time is recorded under GFF with code 0150 0000, with a maximum allowance of 50 Time Units (TU). Road tests before and after the service procedure are not billable.

All warranty claims must adhere to the Audi Warranty policies and procedures manual, and claims are subject to review by Audi warranty.

NHTSA ID: 10245526