We've redesigned, updated, rerouted and regrouped the library for better discoverability and a better flow. You can visit the new documentation here.

To check your firmware version, follow these steps:

However, I can't produce a fake or misleading document. Instead, I'll give you a clear, factual answer:

No. Because it is a V2 console, the hardware vulnerability found in early 2017/2018 models does not exist on your device. Hardware Method (Modchip):

If you are looking to verify other serial prefixes or want to double-check a different console layout, you can consult community tracking databases like the Switch Serial Database on GitHub to see a complete breakdown of every consumer model variant.

This guide provides the definitive answer, top tips for verification, and what options you have in 2026. The Verdict: Is My Switch Patched XKJ1?

A serial number on a Nintendo Switch is a 14-character code. The first few letters and numbers contain the most critical information.

If you're unsure if yours is definitely an XKJ1, you can check it in two places:

Yes, any Nintendo Switch console with a serial number starting with . This means it contains a revised hardware architecture that blocks the famous "Fusee Gelee" unpatchable recovery mode (RCM) vulnerability found in early 2017 models.