Question about 2004 Infiniti M45

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Can't get key fob to work. Replaced the battery in key fob but now can't get it to start. Used the "inside" key, & it cranks, but won't turn over. With key fob it seems to be "locked"

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  • Taya Dianna
    Taya Dianna Oct 14, 2013

    As it turned out, apparently when I took the battery out, the very small programming chip fell out. Thankfully we found it & replaced it & followed steps I found online to reprogram things! THANK YOU!

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You may have to get the key reprogrammed to the immobiliser. Take it to the service dealer and they can do it for you

Posted on Oct 13, 2013

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Posted on Jan 02, 2017

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SOURCE: my passsanger door and one in the back on my Infiniti FX35 will not lock or unlock using the key FOB. I replaced the battery but it still dosen't work?

try holding button longer

Posted on Aug 17, 2012

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1 Answer

I changed my car battery, now my 2008 Nissan Altima key fob won't work


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Won't start, could it be fob or engine?


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Just replaced the battery, now the car won't start unless I lock/unlock the doors using the key fob. How do I set it back to work the way it used to?


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Both key fobs for honda pilot 2006 no longer works. Do I need new keys or is it something internal such as a fuse?


First thing, does the red light on the remote light up when you push any of the button
if no, then replace battery inside remote
if yes, then try repograming the remote to the car again.
-Have both remote ready. fob#1 and fob#2 (doesn't matter which one is #1 or #2)
-each step has to be done within 5 sec or it will not work, but don't do it super fast.
1.turn key just to the "on" position (not starting) and push "lock button " on fob#1 once and release
2.turn key off
3.turn key just to the "on" position (not starting)and push "lock button " on fob#1 once and release
4.turn key off
5.turn key just to the "on" position (not starting)and push "lock button " on fob#1 once and release
6turn key off
7.turn key just to the "on" position (not starting) and push "lock button " on fob#1 twice (if you only have one fob, then stop here and go to step 7)and push the "lock button" on fob#2 twice.
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C240 mercedes key wont turn seems locked... I went to my car used fob doors unlocked when I tried starting i inserted the key in the ignition and the fob will not turn seems locked..now all of a sudden the...


I have a 2001 C240 with the same issue. I removed the positive battery cable from the battery and kept it off for 30 seconds then replaced it. Everything was reset and the key worked.

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But a used 2006 solara but key fob does not remotely open trunk. Any suggestions?


Yes, insure that you have power to the trunk lock inside trunk, If not could be lose/broken wire or shot fuse. I am sure the key fob does work for the doors? If not have key fob battery replaced. Also, a quick check on power to trunk lock, check to see if have remote power button inside car, if it works power is good. Defective key fob would then be indicated.

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