Audi e-tron onboard charger: J1050, 11 or 22 kW?

Confirmed fact: Audi service bulletin 2063427/17 describes the 00C6/8113 addressing issue after J1050 replacement for US-market 2019–2023 e-tron and e-tron Sportback models and 2024 Q8 e-tron, Q8 Sportback e-tron and SQ8 e-tron. Manufacturer statement: 11 kW was standard AC charging in Europe, while 22 kW required a second onboard charger. Editorial conclusion: buy a used unit only after VIN, equipment, label and diagnostic verification.

What does the onboard charger do—and not do?

The onboard charger converts alternating current from an AC post or wallbox into direct current suitable for the battery. It is not the charging cable, Audi portable charging system, wallbox or CCS DC fast charger. During DC charging the station performs the conversion, so AC and DC charging faults may point diagnostics in different directions.

J1050 is the first high-voltage battery charger control module. Audi training material states that in the higher-power arrangement J1050 is the master and J1239, associated with the second charger, is the slave. This is why 22 kW is not simply a software unlock in an 11 kW car.

11 or 22 kW: code KB4 is the key clue

The European Audi e-tron's standard onboard charger accepted up to 11 kW AC. The 22 kW option used a second integrated charger; factory equipment material identifies it with PR code KB4. The Q8 e-tron also had 11 kW standard and 22 kW optional AC capability. A 22 kW marking on the cable alone does not prove that the car can accept 22 kW.

• check the full VIN and factory PR-code list, especially KB4;
• confirm whether a second onboard charger is present and whether the connector layout matches;
• photograph every label line and hardware/software marking on the removed module;
• request a current ETKA check for part-number supersession and market specification.

Why can a replacement appear at address 8113?

Audi's bulletin dated 16 July 2026 says a replacement J1050 may appear at address 8113 instead of the expected 00C6, or the high-voltage system may fail to restart. The document treats this as a diagnostic-address configuration task for the replacement, not proof of another failed part. The procedure depends on software version and requires ODIS and, in some cases, Audi technical support.

For KB4-equipped cars the bulletin also requires the second charging unit to be taken into account. The buying lesson is important: even a J1050 advertised as working is not necessarily plug-and-play. The workshop must verify the correct unit, addressing, network configuration and reactivation of the high-voltage system together.

Which symptom does not prove a J1050 fault?

Slow or failed AC charging can also come from the charging post, cable, connector lock, temperature or communication fault, vehicle settings, supply-voltage problem or another controller. Seeing 11 kW at a 22 kW post can be completely normal if the car has only the standard 11 kW onboard charger.

Before searching for a part, record AC and DC charging separately at more than one known-good charger, including power, dashboard message and exact ODIS fault codes. Replacing a module without diagnosis can be an expensive wrong turn.

Ask for these details when buying a used J1050

• the full 17-character VIN and build date of the car being repaired;
• the exact e-tron or Q8 e-tron model, battery and market version;
• the PR-code list, including confirmation of KB4 22 kW equipment;
• the full part number, revision and sharp label photos of both removed and offered units;
• connector and mounting photos plus confirmation whether J1050 or the second unit is required;
• the workshop's written ODIS diagnosis and confirmation of the commissioning plan.

The Audi bulletin explicitly warns that part references and supersessions can change, so the current electronic parts catalogue must prevail. Model year, housing shape or a shortened part number alone is not proof of compatibility.

How should you test a used e-tron before purchase?

Try a known-good three-phase AC charger and a separate CCS DC charger. Check whether charging starts, remains stable and reaches the AC power appropriate to the car's equipment. Verify 22 kW capability through PR codes and vehicle data as well; do not rely only on the seller or charger display.

Ask for invoices and job sheets for earlier charging repairs. If J1050 has already been replaced, software commissioning and resolution of any address issue should be documented. The manufacturer bulletin applies to the US market, so it is not a warranty promise for a European car, but it is relevant factory evidence about module architecture and post-replacement diagnostic risk.

What is the safe repair sequence?

A high-voltage-qualified workshop should first diagnose the fault and identify the unit actually involved. Then come VIN- and PR-code-based part verification, the current factory supersession, professional installation and ODIS commissioning. Finally, AC and DC charging tests plus fault-code and insulation checks must confirm the repair.