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Old 11-27-2005, 08:13 PM   #1
sonny2
Scooby Newbie
 
Member#: 93182
Join Date: Aug 2005
Chapter/Region: Tri-State
Location: Lake Wylie, SC
Vehicle:
'08 WRX STI
'03 Porsche Boxster S

Question Reprogramming ECU for new Key

As most of you know, the '05 STi has a factory immobilizer which reads a chip in the key. When my car was stolen 2 weeks ago, the thieves destroyed the cylinder lock & it had to be replaced. I now have a new cylinder lock & a new key but the ECU won't recognize it. I'm assuming the dealer can reprogram the ECU for me to recognize the new key.

I (mistakenly) thought the chip reader was inside the new cylinder lock electronics but I've been told it is actually the ECU that reads the code. Since I've already replaced everything, I've had to jury-rig the lock mechanism & reader to start the car. (The chip reader ring is off the cylinder lock. Stick the old key into the ring & put the new key into the cylinder lock & turn the key to start the car. It's a 2 handed process.)

How involved is it to reflash the ECU with the new key code & how long will it take? Do you think a dealer will be willing to do it for me tomorrow if I bring it to them? (I'm going away for a few days tomorrow afternoon & need the car.) I was planning on taking it the place I bought the car from -- Liberty Subaru.
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Old 11-27-2005, 10:10 PM   #2
Murray
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Member#: 11312
Join Date: Oct 2001
Chapter/Region: Tri-State
Location: ghettoville, PA
Vehicle:
2009 Gray
Legacy 2.5i

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it probly requires a Subaru diagnostic scanner...

i work for toyota and the only way to program a Immobiliser key for them is thru the scan tool. older versions used a gas/brke pedal trick, assuming you still had the registered master key, but htats been phased out. i'd call the dealership and see what they say. for toyota its only a 2 minute process, but thats Toyota, not subaru, so who knows.
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Old 11-27-2005, 10:19 PM   #3
freshsti
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Member#: 90099
Join Date: Jun 2005
Chapter/Region: Tri-State
Location: new jerz
Vehicle:
2005 ewg gt52 sti
cgm

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Damn it..When are these ssaholes gonna leave are cars alone.My 05 got stolen back in may.Found it 4 blocks away.Im also from Bergen county and paranoid as hell every time i take it out.Well for what its worth glad you got it back.
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Old 11-27-2005, 11:35 PM   #4
YaZahX
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Member#: 11932
Join Date: Nov 2001
Chapter/Region: Tri-State
Location: NY
Vehicle:
1998 CW ITR
2006 NBP SI

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ya, subaru has to reprogram the key, the key numbers are stored in the body control modual or ecu...(the legacy uses the body control...) its not hard to do, its just a matter of plugging in the scanner and entering the new key number
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Old 11-28-2005, 10:13 AM   #5
sonny2
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Member#: 93182
Join Date: Aug 2005
Chapter/Region: Tri-State
Location: Lake Wylie, SC
Vehicle:
'08 WRX STI
'03 Porsche Boxster S

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Took it to the dealer this morning & they programmed the new key code to the ECU in just a couple of minutes.

Now I just have to take it to a body shop to have the front & rear bumpers fixed & painted.
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