Reddit mentions of Metra 70-8114 Steering Wheel Control Wire Harness with RCA for 2003-Up Select Toyota/Scion/Lexus Vehicles

From memory/Amazon history, here's what I installed:

• Kenwood DDX6704
  
• DKMUS Double Din Radio Stereo Installation Panel
  
• Maestro ADS-MSW Universal Analog Steering Wheel Interface
  
• Metra TYTO-01 JBL Amplifier Interface Harness
  
• Also bought this but I don't think I used it...

This is the package i have put together so far (2005 Prius w/ JBL + Nav). Can anyone tell me if all of this is required, and/or if there are better options available (I'm sure there are better receivers - this just seemed like the best bang for the buck)

Metra Axxess ASWC-1: https://www.amazon.com/gp/product/B00B4PJC9K/ref=ox_sc_act_title_6?ie=UTF8&psc=1&smid=ATVPDKIKX0DER

Metra 70-8114 Steering Wheel Control Wire Harness: https://www.amazon.com/gp/product/B0064J4LOM/ref=ox_sc_act_title_5?ie=UTF8&psc=1&smid=ATVPDKIKX0DER

Metra TYTO-01 JBL Amplifier Interface Harness: https://www.amazon.com/gp/product/B00133RCCC/ref=ox_sc_act_title_4?ie=UTF8&psc=1&smid=ATVPDKIKX0DER

Pioneer AVH-X2800BS Receiver (i may go for one without a backup cam): https://www.amazon.com/gp/product/B01C6BHJUY/ref=ox_sc_act_title_3?ie=UTF8&psc=1&smid=A17Y7218I8U3RT

Metra 95-8240B Stereo Dash Kit: https://www.amazon.com/gp/product/B00EDVR9V0/ref=ox_sc_act_title_2?ie=UTF8&psc=1&smid=ATVPDKIKX0DER

I put a Pioneer 4100 NEX in my 2011 Prius II. It can use Android Auto or Apple CarPlay.

Here are the parts I used to install it.

• [Scosche Dash Kit for 2010 Toyota Prius Din with Pocket and Double Din] (http://www.amazon.com/Scosche-Toyota-Prius-Pocket-Double/dp/B003KZJXVE?ie=UTF8)
  
• [Scosche Radio Wiring Harness for 1987-Up Toyota Power/4 Speaker Connector] (http://www.amazon.com/Scosche-Harness-1987-Up-Speaker-Connector/dp/B00009UHKW?ie=UTF8)
  
• [Posi-Products Car Stereo Connectors] (http://www.crutchfield.com/S-MQKJZ6iyN7I/p_669PP500/Posi-Products-Car-Stereo-Connectors.html) to install the wiring harness
  
• [Metra AX-USB-35EXT 3.5mm iPod to USB Extension Cable - 27-Inch - Black] (http://www.amazon.com/Metra-AX-USB-35EXT-3-5mm-Extension-Cable/dp/B00L2SF64E?ie=UTF8) (Used to extend the USB from head unit to the unused ports in my car)
  
• [Scosche Axt12 12-Inch Antenna Extension Cable] (http://www.amazon.com/Scosche-Axt12-12-Inch-Antenna-Extension/dp/B000NWHVU2?ie=UTF8) (optional, but made it easier)
  
  
  For the steering wheel controls
  
  
• [Metra Axxess ASWC-1 Universal Steering Wheel Control Interface] (http://www.amazon.com/Axxess-ASWC-1-Universal-Steering-Interface/dp/B00B4PJC9K?ie=UTF8)
  
• [Metra 70-8114 Steering Wheel Control Wire Harness with RCA for 2003-Up Select Toyota/Scion/Lexus Vehicles] (http://www.amazon.com/Metra-70-8114-Steering-Control-Vehicles/dp/B0064J4LOM?ie=UTF8)
  
  
  I also installed the [OttoNavi Prius Backup Camera] (http://www.ottonavi.com/Toyota-Prius-2009-2013-Back-Up-Camera-p/ty0913pr-kdcmrcxx.htm) but is out of stock now.