Choosing the right charging cable for the Audi A3 TFSI e (and avoiding the wrong one)

Not every Type 2 cable is a good match for every car. Cables look near-identical from the outside, but they differ in connector rating, number of phases, and length. Pick one that does not match the A3 TFSI e and you will end up either overspending, undercharging, or carrying a heavier cable than you need to.

The plain-English version

The A3 TFSI e has a Type 2 inlet and an on-board charger limited to single-phase, 16 A (around 3.6 kW). That tells you everything you need to spec a cable:

• The connector at the car end must be Type 2. There is no CCS, no DC pin, no CHAdeMO.
• A single-phase 16 A cable is enough. A 32 A single-phase cable is fine but unnecessary.
• A three-phase 22 kW cable is overspec for this car. It will work, but the A3 TFSI e will still charge at 3.6 kW because it has no extra phases to use. You are paying for capability the car cannot accept.

The risk of using a cable that is too cheap or counterfeit is real: a poorly built cable can run hot at the connector or signal the wrong current rating. The risk of using an overspec cable is mostly to your wallet and your back, three-phase cables are noticeably thicker and heavier.

What to look for when buying

1. Type 2 to Type 2, both ends.
2. Single-phase, 16 A rating. A 32 A single-phase cable will also let the car hit its 3.6 kW ceiling, but 16 A is the natural match.
3. Length matched to your parking. 5 m is the common default. 7.5 m or 10 m helps when the charger is not next to the parking bay.
4. A reputable brand with proper IEC 62196 certification. The Voldt single-phase 16 A 3.7 kW Type 2 cable is specified exactly for this car's use case, which keeps weight, price, and capability aligned. The full Audi A3 TFSI e range lists matching accessories.

A note on the OEM brick

The "Mode 2" charger that came in the boot is a different tool: it plugs into a normal household schuko and is capped at around 2.3 kW (10 A). Keep it for emergencies and travel, but do not treat it as your daily home cable. A proper Type 2 cable into a wallbox is faster and runs cooler.

Bottom line

For the A3 TFSI e you want a Type 2 to Type 2 single-phase cable, 16 A rated, in the length that suits your parking. Do not pay extra for three-phase capability the car cannot use.