How to Program an Audi Key Fob (DIY, Dealer, or Locksmith)

Audi is one of the brands where “program it yourself” mostly does not apply. The Volkswagen Group immobilizer stores key data in protected modules, and on newer models the dealer process checks in online with Audi before a key is accepted. That keeps stolen-car rates low but rules out the onboard button sequences that Ford or Honda owners use.

What you can do at home is resync a remote that lost its sync, make sure you buy the right key, and choose between the dealer and a specialist locksmith. This guide covers the A3, A4, A6, Q5, Q7 and TT by generation.

Audi key types and immobilizer generations

Keyless entry and start is branded “advanced key” or “comfort key” by Audi depending on the market and year. The immobilizer generation matters more than the key shape when you look for a locksmith.

Audi key fob programming at home: what is realistic

• Resync an existing key: if a working Audi key stopped locking and unlocking after a battery change, it often just needs to resync. On many older Audis, pressing a button on the remote and then using the key blade in the driver door lock within a short window restores it. Newer comfort keys usually resync automatically when you start the car with the key.
• Program a brand-new key: not possible without immobilizer data and tools. Even owners with VCDS (a popular VW Group diagnostic tool) need the immobilizer PIN or online access, depending on generation.
• Program a used Audi key: keys are locked to the first car. Some locksmiths can unlock certain generations; many cannot.

What you need before you buy

• The correct key for your VIN. Audi dealers order keys by VIN and they arrive pre-coded for your car. Aftermarket blanks must match the part number, frequency (315 MHz in North America on most models) and immobilizer generation.
• A fresh CR2032. Most Audi flip keys, slot keys and comfort keys use one. See our Audi key fob battery replacement guide.
• Proof of ownership and ID for the dealer or locksmith.
• All your keys at the appointment. On some generations, all keys are re-learned together.

How a dealer programs an Audi key

1. You provide proof of ownership. The dealer orders a key coded to your VIN, which usually takes a few days.
2. The key blade is cut, either at the factory or at the dealer.
3. A technician connects Audi’s diagnostic system, which logs in online to Audi’s servers for immobilizer access.
4. The key is adapted to the immobilizer and, on keyless models, to the comfort access system. Remaining keys are often re-adapted at the same time.
5. The technician tests start, locking and the keyless functions.

How a locksmith programs an Audi key

Specialist locksmiths use immobilizer tools that read the needed data from the instrument cluster, the BCM2 module or the engine computer, depending on generation. Common jobs such as adding a key to a B6/B7 A4, a TT mk2 or a B8 A4/Q5 are widely supported. Some B8-era all-keys-lost jobs require removing a module for bench work. The newest comfort-key models may still be dealer-only. Ask whether the price includes the key, cutting and adapting all existing keys. Mobile service can save a tow; see our guide to mobile key fob programming.

Model notes: A4, A6, Q5 and TT

• A4 (B6/B7, about 2002-2008): flip key, Immo III. Widely supported by locksmiths.
• A4 (B8, 2009-2016) and Q5 (8R, 2009-2017): slot key with BCM2. Specialist job; all-keys-lost can be expensive.
• A4 (B9) and Q5 (FY, 2018 on): comfort key; usually the dealer.
• A6: C6 and C7 generations use slot-style keys; newer C8 uses a comfort key and is mostly dealer.
• TT mk2 (2008-2015 in the US): flip key with Immo IV; locksmith-friendly.

Tips before you order an Audi key

• Read the part number from your key. The Audi part number identifies the key generation. Your locksmith will ask for it.
• Ask about all keys. On some generations, every key must be present so the system can be re-adapted. A key left at home may stop working.
• Check the emergency blade. Slot keys and comfort keys hide a mechanical blade for the driver door. Make sure the new blade is cut, or you could be locked out with a dead fob battery.
• Keep a spare. Adding a key while one still works is far cheaper than an all-keys-lost job, especially on BCM2 and newer cars where modules may have to come out.
• Get the quote in writing. Confirm whether the price covers the key, cutting, programming and any online access fee charged by the dealer.

If the new Audi key will not work

• Car starts but remote does not lock: remote not adapted or out of sync. Try the resync, then ask the programmer to re-run remote adaptation.
• Immobilizer light stays on: the key was not adapted or is the wrong generation. See how to reset an immobilizer system for background.
• Used key rejected: it is locked to another car.

Audi key fob programming cost

Compare quotes with our key fob programming cost guide. For an overview of other brands, see how to program a key fob, and if you are shopping for a diagnostic tool anyway, see our best OBD2 scanners for Audi.

Frequently Asked Questions