Review on MicroBypass ALL AVH X Interface Receivers by Autumn Harris

Contacted seller after it didn't work. He said it was my fault for not reading the product description and not offering any help to make it work. Thank him for that. For the AVH-W4400NEX you need to update the firmware to 1.01, ground the parking brake green wire and press and hold 1" down and 1" left until "Set on" appears on the screen. screen (10-15 sec). bypass completed. Works on firmware 1.00. You need to keep the GPS antenna away from the main unit and you will get warning messages on the screen because of that. If you connect an antenna, video in motion stops working as soon as you move (no parking brake - it works when stationary). Redeem my cloth wrapped harness to save the money I make on returns. If I were you and had an AVH-4400NEX I would upgrade the firmware and save money.