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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 06-26-2014, 07:03 PM   #1
ondralex
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Join Date: Jun 2014
Posts: 2
Key won't register with car

First post. I am officially an BMW owner as of 3 days ago and I have loved every second of it so far. Just got a 2003 325i.

At the dealership we discovered the key fob wasn't working so I told them a price if they replaced the battery on the key fob. They came back and told me that you couldn't and gave me $100 off to get a new one as i figured i could just replace it myself.

I went to my folks house to show them the new car and when I pushed a button on the key fob, the car actually responded by locking the door. Then the unlock button worked too. I took a step away from the car and since then it has not worked at all.

This convinced me it was just an old battery that needed to be replaced, I ordered a new battery and it came in today. I replaced the battery on my key fob with the new one. But the car wont respond with it. I tried re-registering it with the car but it won't respond to that either. Am I looking at just a faulty chip at this point? Could it be the transponder in the car? If it was either if those problems, then why did it work intermittently? What do you guys think?


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Old 06-26-2014, 07:06 PM   #2
jfoj
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Join Date: Nov 2009
Location: Fairfax, VA USA
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My Ride: '06 330CiC, '03 M5
www.bmwgm5.com

Time to read and research.

Also a word to the VERY wise, suggest you spend the money now for a new key before you find out the hard way.

http://forum.e46fanatics.com/showthread.php?t=1008294
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Old 06-26-2014, 08:01 PM   #3
saxual328ci
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Join Date: Jun 2004
Location: Virginia
Posts: 1,478
My Ride: 2004 325ci
Go get a new key with the $100 off because that's a good deal. I paid, I think, $120, for a new key. If your windows are tinted that could be your problem...that's if it works sometimes and don't.
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Old 06-26-2014, 08:05 PM   #4
ondralex
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Quote:
Originally Posted by saxual328ci View Post
Go get a new key with the $100 off because that's a good deal. I paid, I think, $120, for a new key. If your windows are tinted that could be your problem...that's if it works sometimes and don't.
Where did you get yours from? The dealer?
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Old 06-27-2014, 07:34 AM   #5
jfoj
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My Ride: '06 330CiC, '03 M5
Keys must come from the dealer/online BMW parts supplier. They are precut to the locks assuming noting has been changed on the car since production.

The EWS will automatically recognize the key on the first start attempt.

The only thing required is to sync the keyfob to the car, takes about 30 seconds and no tools required.

http://www.bmwgm5.com/key_recode.htm

Watch the price of the key, dealers/online parts groups charge anywhere between about $140-$250 for a key. Shop around online as there are just a few sources online.
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299
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