Question about 1999 BMW 323 Series

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I changed the battery on my key and now the car wont start its like the car went into a security lockdown mode

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When you change the battery it has to be reprogrammed. You must do this through a dealer. Most of the times you have to order a new key.

Posted on Sep 17, 2010

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yes absolutely the key has to be properly programmed. You will need to take it to a dealer.

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Sounds like you are losing the power from the battery. Loose connection somewhere between the battery and the fuse box. The car is going into security mode (which prevents the car from starting). This happens when people change the car battery. Leaving the ignition key on for 10 minutes and the security light quits flashing. Car starts. I would be looking at the battery connections and other main power leads going the the relay center. Good luck.

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Hello,,If you have an after market car starter/keyless entry,the car wont start with the hood up also when unhooking/hooking bateries back up with the hood open throws the remote into a lockdown mode,with every thing hooked up and ready for the road,,close hood and lock up your suv and let sit for about ten to fifteen min then unlock and it should start. i sat at a hospital for two hours boosting my truck, it would spin over quite fast but wouldnt start and thats what i did and it fired rite up,,good luck..

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possible you have to reset antitheft mode ,is there a red light flashing when you turn key to on possion not starting it ? some will reset by putting key in drivers door and turning it open close 3 times look for lights to flash then try to start.

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I own a 2007 jeep rubicon i disconnected the batter then started to take the panel where radio is located apart didnt get very far because i re connected the battery and jeep wont start what so ever....any...


I had a similar issue where the alarm went off, pulled the battery to silence, and upon re-connecting it the Jeep wouldn't start. It's a protection mechanism built into the security system to prevent tampering/bypassing the system. The computer goes into lockdown and won't start...

To clear it you have to reconnect the battery and leave it sit. It's supposed to be a 60min cycle, but it seemed like it took longer for me. I plugged it in before leaving for work (in my wife's vehicle) and she tried starting it several hours later when she needed to run an errand and it started right up.

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1999 Infiniti 30 wont start. Disconnected battery for 20 mins. and it strated 4 times in a row. Then I set the alarm and turned alarm off and it wont start. Is this a security issue or a starter problem?


Sounds like it went into theft mode when you unhooked the battery and tried to start it multiple times. Most cars have some sort of SKIM key which is a key with a computer chip in it that is programmed to a module in the car. If this programming is lost by a battery diosconnect it usually needs to be reprogrammmed by a dealer. The reason it won't start is because the theft mode probably has the fuel or spark disabled as a theft deterrent.

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Yea the car is in lock down mode. Something triggered the security system, and as a result, the computer engaged the ignition kill. Disconnecting the battery alone wont solve the problem. What I would suggest is call a local Chevy dealer and ask to talk to a technician, they know the procedure and can walk you throuogh it right over the phone.

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Likely the PassKey system is in lockdown mode. You may need to take it to a dealer. I seem to remember something about turning the steering wheel back and forth while turning the key on some older models that had an ant-theft column... you might try that.

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On MY jeep, the Security Lockdown system kicked in, and it would not start at all, until I put the key in the door, and locked and unlocked it 5 times. I felt stupid, but it worked! A guy at the dealership told me, b/c he owed me a favor. He said usually it is a wrecker call!

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is the security indicator illuminated? its on the dash

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