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Hi All,

There have been some issues that come up with the start button, which generate a keyless entry system fault on the dashboard display. To replace yours yourself, here's what you need:

Button 35881-T4N-702 (found online, for about $150)
Then, you'll need one of the "trim tools" that radio installers and others use, I found this one to be useful:

Start button replace HRV by Lineswest, on Flickr

Then, disconnect the negative battery terminal wires (10mm wrench needed):
Start button replace HRV by Lineswest, on Flickr\

Now use the tool to insert between the start button panel and the lower dash panel to start to 'pry' it away from the dash. There are 4 clips, slowly work your way around the panel using the tool until you can grasp it and (gently) pull it free (you can see several of the white clips that hold it in place in the photo).
Start button replace HRV by Lineswest, on Flickr

Now, detach the wire to the button, it also clips in. Here's a full shot of the panel backside showing all 4 clips that need to be nudged up and away from the dash.
Start button replace HRV by Lineswest, on Flickr

Now, the old button is, again, just clipped to the panel. So, push those retaining plastic pieces back toward the button and slide it out:
Start button replace HRV by Lineswest, on Flickr

Now, put the new one in (it only fits one way, it is keyed by a groove), and repeat the above in reverse. If all goes well, it takes less than 10 min.

Good luck!
Awesome tutorial!! Literally took less than 5 minutes!!
 

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Geez 150$! Many people have had this problem. Honda really should fix this. I have seen other places that just cleaning the contacts on the button works to fix this issue and remove the indicator light from the dash. Im gonna do that before buying a new one.
 

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Honda HR-V from Romania and I had the same problem. Thanks for the instructions. After I've cleaned the pins with a cleaner the error message is gone.
Cheers.
 

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There were several options, I used this one because they were based in New Jersey which isn't too far from where I am. Knock on wood, but no issues so far.
 

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Hi All,

There have been some issues that come up with the start button, which generate a keyless entry system fault on the dashboard display. To replace yours yourself, here's what you need:

Button 35881-T4N-702 (found online, for about $150)
Then, you'll need one of the "trim tools" that radio installers and others use, I found this one to be useful:

Start button replace HRV by Lineswest, on Flickr

Then, disconnect the negative battery terminal wires (10mm wrench needed):
Start button replace HRV by Lineswest, on Flickr\

Now use the tool to insert between the start button panel and the lower dash panel to start to 'pry' it away from the dash. There are 4 clips, slowly work your way around the panel using the tool until you can grasp it and (gently) pull it free (you can see several of the white clips that hold it in place in the photo).
Start button replace HRV by Lineswest, on Flickr

Now, detach the wire to the button, it also clips in. Here's a full shot of the panel backside showing all 4 clips that need to be nudged up and away from the dash.
Start button replace HRV by Lineswest, on Flickr

Now, the old button is, again, just clipped to the panel. So, push those retaining plastic pieces back toward the button and slide it out:
Start button replace HRV by Lineswest, on Flickr

Now, put the new one in (it only fits one way, it is keyed by a groove), and repeat the above in reverse. If all goes well, it takes less than 10 min.

Good luck!
 

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Thanks so much for this feature. Bought the part on Amazon for under forty bucks followed your instructions and was done in 10 minutes saved 260 bucks from the dealer price. The nylon dash tool was helpful at 7 dollars.
 

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I've been seeing the indicator light on for a few months but was just ignoring it. This was probably a 5 minute fix... Used some cell phone dissection tools to remove the panel, a $7 tube of permatex dielectric grease that will last a lifetime, and some CRC electric cleaner I had from another project

Dash light went away, and knowing how easy that was even if I had to replace the button I know it's not a huge deal. Thanks for the instructions!

Sent from my Pixel 2 XL using Tapatalk
 

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Thanks for posting this tutorial, it was extremely helpful. I went to a honda dealership and they quoted me $755 to replace the start/stop engine switch. Thankfully, I saw this discussion and decided to do it myself. I ordered the new switch on Amazon for $38. Looks like OEM Honda branded switch.


Took me 15 minutes to complete and saved a ton of money. Car is working perfectly now.
 

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I've made a video about how to COMPLETELY clean the contacts in this switch.

 

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Thanks so much for this feature. Bought the part on Amazon for under forty bucks followed your instructions and was done in 10 minutes saved 260 bucks from the dealer price. The nylon dash tool was helpful at 7 dollars.
where did you get the dash tool?
 

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I just sprayed contact cleaner and added dielectric grease without taking the switch apart and it's been almost a year without the light coming back on.
We've been having problems with at least one of the keys not starting the car. Do you think this would fix that issue as well? Curious what all led to you doing this?
 

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We've been having problems with at least one of the keys not starting the car. Do you think this would fix that issue as well? Curious what all led to you doing this?
It might. This is a common issue and there are several threads regarding the smart entry warning light and start button issues. Somebody tried it first and others, including myself, tried it with positive results.
 

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It might. This is a common issue and there are several threads regarding the smart entry warning light and start button issues. Somebody tried it first and others, including myself, tried it with positive results.
I'm going to order a switch and a dash tool this weekend in hopes of fixing it myself. I'm not a car guy but I can fix electronics so I'm not real afraid of this project.
I appreciate everyone's posts on this board, very helpful reading all of them.
 

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where did you get the dash tool?
Amazon probably has them, but personally I was just careful with a blade screw driver and had no issue removing. 2016 switch, cleaned and greased and working for some time now.

Sent from my Pixel 2 XL using Tapatalk
 

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I wonder if this is an issue because the continual touching of the button allows oils or sweat from our fingers or even water if wearign winter gloves etc to eventually find its way into the switch itself.
 
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