- (214) 717-6398
- info@dfwkeys4cars.com
- Mon - Fri: 9:00 - 18:30
Audi A5 / S5 Key Replacement
Audi A5 / S5 keys date back to 2007 and span 2 key systems across the model’s generations — flip / smart (comfort access); smart key. DFW Keys 4 Cars cuts and programs every one of them at your location anywhere in Dallas–Fort Worth, 24/7 — spares, all-keys-lost, fobs and lockouts. Call (214) 717-6398.
About A5 / S5 Keys
Verified key reference for the Audi A5 / S5 — model years, key types, and the transponder/immobilizer each generation uses. Boundary years can overlap; we confirm the exact part by VIN before dispatching.
| Model / Generation | Years | Key Type | Transponder / Immobilizer | Blade / FCC |
|---|---|---|---|---|
| A5 · S5 | 2007–2016 | Flip / smart (Comfort Access) | Hitag-Extended VAG (PCF7945AC) | HU66 |
| A5 · S5 | 2017–2024 | Smart key | Megamos Crypto AES | HU162T |
Security System & Immobilizer
Audi spans Megamos ID48, the 8E era, Hitag-extended precoded keys, and Megamos AES on MLB/MQB platforms.
On the A5 / S5 specifically we see: Hitag-Extended VAG (PCF7945AC), Megamos Crypto AES. A correctly cut but unprogrammed key turns the locks and never starts the engine — programming is the half of the job that matters.
Which key does your year have?
- 2007–2016: Flip / smart (Comfort Access) — Hitag-Extended VAG (PCF7945AC) (HU66)
- 2017–2024: Smart key — Megamos Crypto AES (HU162T)
Our A5 / S5 Key Services
- Key replacement — lost, stolen or broken keys cut from code and programmed on-site, including all-keys-lost by VIN
- Spare key duplication — cheap insurance done in one short visit
- Fob & transponder programming — remotes and smart keys paired to the immobilizer
- Lockout service — damage-free entry, 24/7
- Ignition repair — worn cylinders and keys that won’t turn
Audi A5 / S5 Key FAQ
I lost the only key to my A5 / S5. What now?
We come to the vehicle, verify ownership, cut a new key from the VIN, and program it on-site — no tow, no dealer wait.
My A5 / S5 is push-to-start — can you program that outside the dealer?
Yes. Late models (2017–2024) use a proximity smart key on Megamos Crypto AES — we carry the fobs and the programmer, and we cut the emergency blade.
How fast can you reach my A5 / S5 in DFW?
We dispatch the nearest mobile unit metroplex-wide, 24/7 — call (214) 717-6398 for an honest ETA.