The CRUX SWRTY-61J is a radio replacement interface designed for select Lexus and Toyota vehicles (2003-Up) equipped with factory JBL amplifiers. It facilitates the integration of an aftermarket radio while retaining essential factory features. This interface ensures the retention of factory steering wheel controls (SWC), allowing for continued use of audio commands and even iPhone Voice Recognition (VR) on compatible aftermarket radios.

The SWRTY-61J also preserves the factory JBL amplifier, though front-to-rear fading capability may be lost. Additionally, it retains the OEM 3.5mm auxiliary audio input and the factory backup camera (if present), providing a seamless upgrade experience. The module offers variable audio gain adjustment to match the aftermarket radio's output with the factory amplifier for optimized sound levels.

It provides navigation outputs such as parking brake, reverse, and vehicle speed sense (V.S.S) for compatible aftermarket navigation units. The wiring is EIA color-coded for straightforward installation.