Immobilizer, is there a chip in the key/hinge part of fob too? - Mazda3 Forums : The #1 Mazda 3 Forum
 2Likes
  • 1 Post By kenc184
  • 1 Post By madmatt2024
 
LinkBack Thread Tools
post #1 of 5 (permalink) Old 03-18-2017, 01:01 PM Thread Starter
Bicycle Rider
 
Join Date: Mar 2017
Posts: 3
Immobilizer, is there a chip in the key/hinge part of fob too?

Hi all,

Just bought a second 4 button keyless remote fob with blank key from carsandremotes.com for my sons 2013 mazda 3. The fob LOOKS like OEM, unlike most of the super cheapies it does have the Mazda logo on the top of the fob by the key "hinge".

Managed to program the fob fine. Yesterday, I got the key cut, the usual locksmith story of "no guarantee unless we provide the key". Sure, OK. The key cut looks identical to the original. It opens the door, and the ignition barrel goes all the way around but will not start the car. The immobilizer icon flashes rapidly on the dash when I try to start the car.

I know it isn't the electronics as I swapped the key/hinge part over to the old fob. Still the old key on the new fob will start the car but the new key on the old fob won't. I also tried just the key/hinge part with the fob left in the house and the old one works fine but the new one does not.

I wonder if there is also an RFID chip or something in the hinge part of the fob? It must either be that or some really subtle difference in the way the key was cut - btw the locksmith claims to have used an expensive laser guided key machine. The new key blank was a few thou thinner than the old one, and maybe 10 thou narrower, plus the ramp at the base of the key maybe is a 1/32 longer. But as I mentioned, the key turns the barrel and opens the doors perfectly.

I think there's a roll pin holding the key into the hinge, so I might try knocking that out and swapping the key shank over to the other hinge and see what happens.

Does anyone know what kicks the immobilizer on?
kenc184 is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 03-18-2017, 04:30 PM Thread Starter
Bicycle Rider
 
Join Date: Mar 2017
Posts: 3
Looks like there must be an RFID chip in the head. I removed both key shanks from the hinge, and without the hinge piece present neither key would start the car. Putting the new key shank in the old hinge and the car starts. Locksmith did his job, not his fault.
This sucks, I have $100 in the new fob/key and it is useless unless I can defeat the immobilizer.

IMG_0701.JPG
kenc184 is offline  
post #3 of 5 (permalink) Old 03-19-2017, 12:51 PM
Le Mans: Prototype Class
 
madmatt2024's Avatar
 
Join Date: Sep 2013
Location: Upstate NY
Posts: 1,262
Quote:
Originally Posted by kenc184 View Post
Looks like there must be an RFID chip in the head. I removed both key shanks from the hinge, and without the hinge piece present neither key would start the car. Putting the new key shank in the old hinge and the car starts. Locksmith did his job, not his fault.
This sucks, I have $100 in the new fob/key and it is useless unless I can defeat the immobilizer.

Attachment 91002
Take the car to the dealer or an automotive locksmith and have the new key programed or read how to do it in the owners manual. Doing it yourself usually requires that you already have two keys on hand that can start the car, if not then it has to go to the dealer or locksmith.
madmatt2024 is offline  
Sponsored Links
Advertisement
 
post #4 of 5 (permalink) Old 03-19-2017, 10:10 PM Thread Starter
Bicycle Rider
 
Join Date: Mar 2017
Posts: 3
Yeah, of course I only have one original key with the vehicle, not two. Sigh..........I guess I had better take a jar of vaseline with me to the dealer.
DavCav likes this.
kenc184 is offline  
post #5 of 5 (permalink) Old 03-20-2017, 12:59 PM
Le Mans: Prototype Class
 
madmatt2024's Avatar
 
Join Date: Sep 2013
Location: Upstate NY
Posts: 1,262
Quote:
Originally Posted by kenc184 View Post
Yeah, of course I only have one original key with the vehicle, not two. Sigh..........I guess I had better take a jar of vaseline with me to the dealer.
It should be under $100. The best thing is to have another key made so that you have Three total. That way if you ever loose one you will still have two available so you can program another.
DavCav likes this.
madmatt2024 is offline  
Sponsored Links
Advertisement
 
Reply

  Mazda3 Forums : The #1 Mazda 3 Forum > Mazda3 General Discussion > Mazda3 (Axela)

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Mazda3 Forums : The #1 Mazda 3 Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Image Verification
Please enter the six letters or digits that appear in the image opposite.

Registration Image

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
2007 Mazda 3 Part Out nchapa001 For Sale | M3F 18 04-12-2017 02:13 PM
Need advice on parts to replace suspension on 07 mz3 buckethead99 Suspension / Brakes 9 02-20-2017 06:05 AM
What is the correct part# for rear brakes on 2005 Mazda 3? deluxman Suspension / Brakes 2 10-06-2016 01:00 AM
Mazda 3 Immobilizer issue - All lights on dash Coconuts Mazda3 (Axela) 0 08-25-2016 04:14 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome
8