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Steve, BMW Expert
Category: BMW
Satisfied Customers: 28838
Experience:  BMW Expert
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I've got a 2006 650i with an ARS fault, it comes as 5D55

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Hi, I've got a 2006 650i with an ARS fault, it comes as 5D55 learning, rear axle pressure sensor.
I've recently replaced the battery (and coded) and replaced the alternator and regulator.
Do you have any ideas in why I have this code?
Many thanks
Hello and welcome,
My name is ***** ***** it will be my pleasure to assist you today.
I will provide an honest answer. I trust this will be appreciated. Please remember that a low rating PUNISHES me for being honest and that I receive nothing for my time until a positive rating is clicked.
this code would most likely be caused by either a simple defective sensor, or the need for it to be reset/recalibrated with a factory BMW diagnostic tool
Please let me know if you have further questions. Please do not forget to click a positive rating as this is the only way I receive credit for my answer, thank you. Best wishes with your vehicle
Steve and other BMW Specialists are ready to help you
Customer: replied 4 years ago.
I managed to plug in another sensor to see if it helped at all but no luck, so do you reckon a BMW reset would fix my issue? I don't want to take it to BMW straight away to be mugged off so I'm trying bits myself first. Many thanks Steve
yes, a reset is likely to fix it.
if not, at the very least proper test plans can be run to determine the cause as this single static fault code doesn't point to anything other than the sensor / calibration.
Customer: replied 4 years ago.
Many thanks il give them a call tomorrow, do you know what they will charge roughly?
likely a one hour diagnostic charge. probably around £150-200
Customer: replied 4 years ago.
Maybe I should of tried to calibrate the new sensor I plugged in, as we just plugged in another sensor and checked for the fault on DIS software, if I connect a new sensor and calibrate should it work?
assuming that is the true cause (likely), then yes
Customer: replied 4 years ago.
I had an overvoltage issue so I replaced the original (10 year old battery!) And alternator because of the faulty alternators , but neither of these helped my issue so far
a sensor replacement and calibration is the next step
Customer: replied 4 years ago.
Many thanks, ***** ***** it gets sorted as I've only had it 2 months and it's putting me off already ūüĎé
Customer: replied 4 years ago.
Calibrated a new sensor and all working fine now many thanks