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Immediately stalls after replacing the key and CAS module?

Tiny
OLDMIKEB80
  • MEMBER
  • 2009 BMW X3
  • 3.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 165,000 MILES
I just had the key and CAS module replaced at the dealership and reprogrammed. Now the vehicle stalls amidst immediately street starting. What would cause this?
Friday, January 10th, 2025 AT 8:21 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 49,037 POSTS
I would take the car back because it sounds like it is not programmed correctly? Can I ask if the security light is flashing? If so, this is the problem.

The CAS module (Car Access System) in your 2009 BMW X3 (E83) is responsible for managing vehicle access, security, and immobilization.

So, on back it goes! Let me know what they say.
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Friday, January 10th, 2025 AT 12:18 PM
Tiny
OLDMIKEB80
  • MEMBER
  • 2 POSTS
I have taken it back and they are charging me another 400 to diagnose the issue, saying it's something else unknown. What would be other possible causes?
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Friday, January 10th, 2025 AT 1:09 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 49,037 POSTS
Can I ask if the security light is flashing? We should do a CAN scan, this video will show you how. You can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

https://youtu.be/u-4syLc-ifQ

Please go over this guide and get back to us.
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Saturday, January 11th, 2025 AT 9:13 AM

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