Examples:

• VW Golf 6 / 7 / 7.5
• Passat B6 / B7 / B8
• Audi A4 B8 / A5 / A6 C7
• Skoda Octavia 2 facelift / Octavia 3
• Superb 2 / 3
• Seat Leon 2 facelift / Leon 3

👉 If the car has:

• start-stop
• intelligent charging
• IBS sensor on battery
• battery in trunk

→ it almost always needs coding.

Examples:

• VW Golf 4 / early Golf 5
• Passat B5
• Audi A3 8L
• older Skoda Fabia / Octavia 1
• small VAG cars without energy management

👉 These use classic alternator control → no battery coding.

There are two common ways depending on vehicle.

1. Connect diagnostic tool
2. Select control unit:

19 – CAN Gateway

3. Open:

Adaptation

4. Find channel:

Battery adaptation (channel 04)

Used on some Audi / newer models.

1. Select control unit:

61 – Battery Regulation

2. Open:

Adaptation

3. Choose:

Channel 04 (Battery adaptation)

Battery coding string usually has format:

XXX YYY ZZZZZZZZZZ

Where:

• XXX = battery size
• YYY = manufacturer code
• ZZZZZZZZZZ = serial number

If your battery brand is not listed → use UNK.

Two options:

(best but not required)

Read serial from battery label and enter it.

👉 Keep original coding
👉 Change only last digit

Example:

Old: 072 VA0 1234567890
New: 072 VA0 1234567891

This tells ECU:
✔ new battery installed
✔ resets charge history
✔ works perfectly

Some cars require setting battery type in long coding.

Typical values:

Byte 02 = Hex 18

Used for:

• AGM batteries
• start-stop systems
• higher energy demand

Typical values:

Byte 02 = Hex 78

Used for:

• EFB batteries
• mid-range start-stop vehicles

On some cars:

Byte 02 = Hex 08

(or default value)

1. Enter new battery string
2. Confirm adaptation
3. Save coding
4. Turn ignition OFF for 30 seconds
5. Start engine

Energy management resets automatically.

Possible issues:

• battery overcharging
• battery undercharging
• shorter battery life
• start-stop not working
• charging faults stored in ECU