2020 Nissan Sentra S, Upgrade Stereo To 2021 Headunit
Printed From: the12volt.comForum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=148468
Printed Date: March 17, 2026 at 8:35 PM
Topic: 2020 Nissan Sentra S, Upgrade Stereo To 2021 Headunit
Posted By: hockeyjohn35
Subject: 2020 Nissan Sentra S, Upgrade Stereo To 2021 Headunit
Date Posted: January 30, 2026 at 1:33 PM
Replies:
Posted By: hockeyjohn35
Date Posted: February 02, 2026 at 8:46 AM
Posted By: hockeyjohn35
Date Posted: February 03, 2026 at 8:13 AM
It all starts by finding the pinouts for the respective radios, and both configurations can be found in the same manual here:
https://cardiagn.com/2020-nissan-sentra-b18-manual-audio-visual-navigation-system/
The original 7" screen radio pinout starts on page 30
The new 8" screen pinout starts on page 132
The pinout numbering looks like this (view looking at the back of the radio)
The goal is to make these wire harnesses from the 7" screen radio
Look like these from the 8" screen radio
I put together a handy conversion table to see what goes where
I started by putting small lables on each wire and numbered them to their original location (in case things went wrong, I could always revert back), then painstakingly pulled the wires from their respective harness locations. Pulling those wires from the harness was by far the most difficult part. Then, using the conversion chart, I pushed the wires into their new locations. Two wires (#8 and #17) had to be pulled from the 20 pin harness, and relocated to the 40 pin harness to locations #40 and #60 respectively. Only one wire #29 (camera detect ground) from the original harness configuration had no where to go in the new configuration, so I taped it off and left it out. I also had to add a ground wire to the 20 pin harness at location #20.
I plugged the new stereo in, and everything works perfectly!
Mission accomplished!
-------------
JRW
https://cardiagn.com/2020-nissan-sentra-b18-manual-audio-visual-navigation-system/
The original 7" screen radio pinout starts on page 30
The new 8" screen pinout starts on page 132
The pinout numbering looks like this (view looking at the back of the radio)
The goal is to make these wire harnesses from the 7" screen radio
Look like these from the 8" screen radio
I put together a handy conversion table to see what goes where
I started by putting small lables on each wire and numbered them to their original location (in case things went wrong, I could always revert back), then painstakingly pulled the wires from their respective harness locations. Pulling those wires from the harness was by far the most difficult part. Then, using the conversion chart, I pushed the wires into their new locations. Two wires (#8 and #17) had to be pulled from the 20 pin harness, and relocated to the 40 pin harness to locations #40 and #60 respectively. Only one wire #29 (camera detect ground) from the original harness configuration had no where to go in the new configuration, so I taped it off and left it out. I also had to add a ground wire to the 20 pin harness at location #20.
I plugged the new stereo in, and everything works perfectly!
Mission accomplished!
-------------
JRW
Posted By: the12volt
Date Posted: February 03, 2026 at 8:56 AM
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