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Old 13-06-2020, 04:15 PM   #1
PaulN
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Default Ford Focus 2005 LX seat belt ECU

I need to replace my ecu module, 4M5T 14B056 BF. It’s a 4 door sedan. Is one ending in BJ compatible? It’s possibly from a hatch. I know that I’ll have to get it reprogrammed to my car, but will it work?
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Old 14-06-2020, 08:55 AM   #2
russellw
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Default Re: Ford Focus 2005 LX seat belt ECU

Are you replacing the ECU or the RCM?
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Old 14-06-2020, 10:36 AM   #3
PaulN
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Default Re: Ford Focus 2005 LX seat belt ECU

I’ve been assured it’s called the airbag ecu, or module. it’s located under the armrest, below the handbrake.
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Old 15-06-2020, 08:08 AM   #4
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Default Re: Ford Focus 2005 LX seat belt ECU

GT, Airbag Control Module is the name on the part. I’ve looked on eBay for the part that you provided and it’s a rcm for a 1.8, my Focus is a 2.0. The shape looks the same. I’ve lined up a BJ locally, so I think I’ll have a talk with the reprogramming guys.
Also, I have the lift up armrest... any idea how to remove the lid. There must be a simple trick, but I can’t get it.
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Old 15-06-2020, 05:27 PM   #5
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Default Re: Ford Focus 2005 LX seat belt ECU

All, thanks for your assistance.
I have replaced the airbag ecu today. The one I got had BJ instead of BF at the end of the part number. I followed the rules, removed battery cable, waited 30 minutes and replaced the ecu.
Importantly, it’s a ‘plug and play’ change over. No need to be reprogrammed which was a bonus. No airbag fault light anymore.
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Old 15-06-2020, 06:21 PM   #6
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Default Re: Ford Focus 2005 LX seat belt ECU

That’s good, but maybe test the airbags to be sure?
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Old 15-06-2020, 06:43 PM   #7
PaulN
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Default Re: Ford Focus 2005 LX seat belt ECU

I had an auto elect. run a diagnostic check and the system checked out. The old ecu was definitely faulty.
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