2021-2022 Audi e-tron Coolant Leak N632 TSB

Symptoms of an Audi e-tron Coolant Leak N632

Owners of 2021-2022 Audi e-tron vehicles may observe several signs indicating a cooling system issue. The most common symptom is seeing "Traces of coolant can be seen under the vehicle," suggesting a leak. Another clear indicator is when "The coolant warning lamp appears in the instrument cluster," alerting the driver to a potential problem.

Sometimes, the issue is not immediately apparent to the owner but is instead "noticed by the workshop when performing service work." Technicians might find a low coolant level in the coolant expansion tank that isn't due to normal consumption or other leaks, pointing to an internal problem with the cooling system.

Diagnosis and Trigger Conditions

This particular Audi e-tron coolant leak N632 issue arises due to an elastomer in the coolant valve N632 (part number 4KE963375K) that can lead to minor leaks, especially at very low temperatures. The leak typically occurs when the coolant valve N632 switches under cold conditions.

To diagnose this problem, technicians use the ODIS scan tool. The diagnostic process involves navigating through the Guided Functions:

• Go to Diagnostic address 008C.
• Select "Guided Function" and then "Read identification."
• Proceed to "Read additional identification data" and "Read and display identification data of sub-systems (slaves)."

The scan tool will display the identification results, which are recorded in the diagnosis log. Technicians must then scroll to locate the coolant valve N632 and verify its part number. Specific part numbers like 4KE963375K, 4KE963375J, and 4KE963375H are identified during this process. If the regulating valve is found to have an index of “K” or “Q” in its part number, it is identified as the faulty component responsible for the Audi e-tron coolant leak N632.

Repair Procedure Summary

If the diagnostic process confirms that the regulating valve N632 has an index of “K” (part number 4KE963375K) or “Q” (part number 4KE963375Q), the valve must be replaced. The repair involves checking the existing coolant valve, then removing and installing a new one. After replacement, a road test is performed to ensure the cooling system functions correctly and the leak is resolved.

Required Parts and Tools

For the repair of the Audi e-tron coolant leak N632, specific parts are required:

• Valve Electric: Part number 4KE 963 375 K (Quantity: 01)
• OR
• Valve Electric: Part number 4KE 963 375 Q (Quantity: 01)
• Fasteners, Bolts, Nuts and Screws: As needed per the Repair Manual (See ETKA/ELSA)

Technicians should always consult their Parts Department and/or ETKA for the latest information and any updated parts bulletins.

Warranty Information

This Technical Service Bulletin outlines specific warranty claim procedures for the Audi e-tron coolant leak N632.

Claim Types:

• 110: For vehicles up to 48 months or 50,000 miles.
• G10: For CPO (Certified Pre-Owned) Covered Vehicles, requiring owner verification.

If the vehicle is outside of any warranty coverage, this TSB serves as informational guidance only.

Service Numbers and Damage Codes:

• If the installed coolant valve N632 is part number 4KE963375K:
  • Service Number: 1985
  • Damage Code: 0050
• If the installed coolant valve N632 is part number 4KE963375Q:
  • Service Number: 9384
  • Damage Code: 0050

Labor Operations:

Labor Operation	Code	Time Units (TU)
Check coolant valve (N632)	93 84 01 99	10 TU
Remove and install coolant valve (N632)	93 84 19 50	40 TU
Diagnostic Time (GFF)	0150 0000	Max 40 TU
Road test prior to service procedure	No allowance	0 TU
Road test after service procedure	No allowance	0 TU

All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual and are subject to review or audit by Audi Warranty.

Source: NHTSA ID 10222097