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Metra 70-7551-open box

Amplifier Integration Harness for Select Infiniti Vehicles

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This item has been discontinued

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Metra Audio Store

Product Features:

  • Factory amplifier integration harness for 1995-2005 Infiniti vehicles
  • 4 RCA Plugs plug into the aftermarket radio's pre-amp outputs
  • One 10-pin power plug and one 6-pin speaker plug
  • Allows for the installation of an aftermarket radio using the existing factory wiring and connectors
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty


  • Yellow โ€“ 12V Constant
  • Red โ€“ 12V Accessory
  • Black - Ground
  • Orange โ€“ Dash Light Dimmer/Illumination
  • Blue - Amplifier Turn-On

Compatibility List:

  • Infiniti:
    • 2003 - 2005 G35
    • 2001 - 2003 QX4

Harness Features

Main Harness Function
Different installations on different vehicles require different harnesses. This type is what the harness is considered. Each wiring harness we sell serves a purpose such as installing an aftermarket car stereo, integrating an aftermarket amplifier with your factory car stereo, connecting Bluetooth to your factory car stereo, and more.
Install a Car Stereo & Bypass the Factory OEM Amplifier
Compatible Vehicle Make
Allows you to view only items that are compatible with your vehicle's make. Does not guarantee that it will work with your vehicle year or model.
Compatible Vehicle Make and Model
The model of vehicle that this vehicle specific product is designed for. Please keep in mind that engine variations can affect the compatibility of the products.
Infiniti G35
Infiniti QX4

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

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Average Attribution Rating

Browse 4 questions and 18 answers
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Why did you choose this?
Sonic Electronix Store
Ronald M on Oct 2, 2016
Because it was recommended for installation and it was free.
Darlene H on Aug 24, 2016
It was a free accessory for the radio I ordered.
Charles P on Sep 19, 2016
I need this to connect my aftermarket stereo to my 2007 nissan murano Bose audio system
Amadou on Nov 20, 2015
Is this needed for stereo replacement for a 2005 Nissan Murano SL with factory Bose audio system?
A shopper on Sep 5, 2015
Best Answer: Yes, you defenitly need it. My 06 pathfinder has tge bose system. the bose system has multiple amps that drive the speakers instead of just standard radio to speaker configuration. Make sure the aftermarket radio you are buying has at least a 5v rca preamp output or it will struggle driving the bose amp/speakers.
Reply · Report · James S on Sep 5, 2015
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I recently purchased a pioneer AVIC z150bh for my 2006 Armada w/Bose. I will be getting a free Scosche NN03B. After doing more research i came across the Metra 70-7551, this harness looks like it is a better fit for my needs since my vehicle has a stock bose amp. Is this right? or will the Scosche harness work as well? If not, would i be able to switch harness' on my order?
Emanuel I on Dec 21, 2014
Best Answer: Hello Emanuel,

The Scosche piece will work, the only concern is that the VOLUME may be FAR higher than expected, because you will be sending a HIGH LEVEL signal to the Bose Amp. Please give our sales team a call, to have the harness swapped out for the Metra piece, at no additional cost.
Reply · Report · Customer SStaff on Dec 21, 2014
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Is this needed for stereo replacement for a 2006 Nissan Murano SL with factory Bose audio system?
Carlos R on Oct 25, 2014
Best Answer: Hello Carlos,

Yes. This harness will be required to properly send the OEM Amp a proper signal, AND to actually turn On the amp. Take note, the harness requires FOUR RCA connections; So please make sure the headunit you wish to go with has 4 "Preouts" .
Reply · Report · Customer SStaff on Oct 25, 2014
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Product Summary


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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Metra 70-7551-open box