2023-2025 Audi On-Car Analysis List TSB

Audi has released Technical Service Bulletin (TSB) 2066297, an 'On-car analysis list' dated October 1, 2025, detailing various issues affecting a wide range of 2023-2025 Audi models. This bulletin serves as a guide for technicians to gather specific diagnostic information before attempting repairs. Among the critical concerns highlighted is Audi e-tron drive motor contamination, alongside other problems like brake pulsation, MIB3 MMI system delays, and specific diagnostic trouble codes (DTCs).

This document emphasizes the importance of contacting the Audi Helpline and reviewing TSB 2066297 for proper diagnostic procedures and information gathering.

Symptoms and Issues Addressed

This TSB covers a range of symptoms and underlying problems across various Audi models:

• Brake Pulsation: Affecting 2023-2024 Audi Q8 e-tron models, this issue requires specific run-out measurements to be taken and included in the Technical Assistance Center (TAC) case, following TSB 2022584.
• MIB3 MMI Slow Startup: For 2024-2025 Audi A4, A5, Q5, A6, A7, Q7, and Q8 vehicles, the MIB3 infotainment system may take an unusually long time to load at startup. The 'User' tile might be missing, defaulting to a guest user profile. On-site analysis and contact with TAC are required.
• Difficult to Fuel / EVAP Canister Parts Block: Owners of 2021-2025 Audi A4 and A5 models might experience difficulty fueling due to a blocked EVAP canister, specifically part number 8W0201801M. This also requires on-site analysis and TAC consultation.
• DTC P001700: Crankshaft Position-Camshaft Position Correlation: This fault code may appear in 2025 Audi Q5 (GU) vehicles with a 2.0L engine. Technicians must verify the P001700 code and open a TAC ticket for possible on-site assistance.
• DTC U041800: Invalid Data from Brake Control System A: This diagnostic trouble code can be stored in 2025 Audi Q5 and A5 (GU, FU) models with a 2.0L engine, indicating invalid data from the brake control system. On-site analysis and TAC contact are necessary.
• Drive Motor Coolant and Gear Oil Cross Contamination: Owners of 2019-2023 Audi e-tron quattro vehicles may experience Audi e-tron drive motor contamination, where coolant and gear oil mix. This serious issue requires careful documentation. Technicians are instructed to take photos of the coolant reservoir, any coolant collected from the front drive motor, gearbox fluid samples (in a white cup at a 45-degree angle), and any debris found in the gearbox. It is crucial to verify the customer's concern and determine if any prior repairs to the drive motor or gearbox have occurred, as this information may impact further action.
• PPE/PPC Vehicle Time Discrepancy: For 2025 Audi A5, Q5, A6 e-tron, and Q6 (FU, GU, GH, GF) models, the vehicle's time may be off by one hour. Technicians are asked to photograph the time in the cluster, MMI settings, and a phone with navigation showing location and time. They must read all Measured Value Blocks (MVBs) from Da0075 when the issue is both present and not present, documenting the log ID. Specific location information and attempts to duplicate the issue on other vehicles or in different time zones are also requested.

Fault Codes / DTCs

The TSB specifically mentions the following diagnostic trouble codes:

Code	Description	Module
P001700	Crankshaft Position-Camshaft Position Correlation Bank 1 Sensor B	Engine
U041800	Invalid Data from Brake Control System A	Brake Control System

Diagnosis and Data Collection

For most issues, Audi requires extensive data collection and, in many cases, direct consultation with the Technical Assistance Center (TAC). This includes detailed photographic evidence for issues like the Audi e-tron drive motor contamination and time discrepancies, as well as specific measurements for brake pulsation. The goal is to gather comprehensive information to understand the root cause of these varied problems.

Required Tools or Parts

While specific repair parts are not universally listed for all issues, the TSB mentions:

• EVAP Canister Parts Block: Part number 8W0201801M is identified as a potential cause for fueling difficulties in certain A4 and A5 models.
• TSB 2022584: Referenced for specific run-out measurement procedures related to brake pulsation.

Owner Action

If you suspect your vehicle is affected by any of the issues mentioned in TSB 2066297, such as brake pulsation, MIB3 MMI startup delays, or particularly the Audi e-tron drive motor contamination, it is essential to contact your authorized Audi dealer. Provide them with the symptoms you are experiencing and reference TSB 2066297. The dealer will follow Audi's diagnostic procedures, which may involve gathering detailed information and consulting with Audi's Technical Assistance Center before proceeding with any repairs.

Source: NHTSA ID 11025251