What OBD adapter should I use with ATLAS on a 2022+ WRX, and can I use an OBDLink?

You can use an OBDLink, and you do not need a Tactrix OpenPort 2.0 - but the choice affects your experience more than people expect. Here are the supported options and what separates them. **OBDX Pro VX.** The newest supported adapter and described as lightning-fast, connecting wirelessly over Bluetooth or WiFi. Wireless matters more than it sounds during datalogging, because it means no cable stretched from the OBD port to a laptop on the passenger seat while you drive. **Tactrix OpenPort 2.0.** The original flagship device and the one most Subaru tuning documentation assumes. It is a proven wired J2534 interface and it remains widely used. The practical catch is that it has been listed as out of stock, so if you are shopping now you may not be able to buy one new. **OBDLink EX.** A wired option that works and is explicitly noted as slower than the OpenPort 2.0. If you already own one, use it. If you are buying specifically for ATLAS, the speed difference is worth weighing. **Various ELM327 adapters.** Supported via direct serial connection through a driver written natively into ATLAS. These are the cheapest route and the most variable in quality - ELM327 is a chipset name that covers an enormous range of clones of differing reliability. Why speed matters. Reading and flashing an ECU is a bulk data transfer. A slower adapter means a longer flash, and a flash is a period where you want the process to complete cleanly and promptly rather than linger. It also means slower datalog sampling, which affects how much resolution you get when diagnosing something. The practical recommendation: if you are buying new specifically for ATLAS, the OBDX Pro VX is the current fast option and wireless is a genuine convenience. If you already own an OpenPort 2.0, keep using it. If you already own an OBDLink EX, it works fine and you can start today. Whatever you use, put the car on a battery charger or tender before flashing. Adapter choice affects how long the flash takes; battery voltage affects whether it completes.