Common Error Code Information relating to a pump fault
On some models there is a genuine OEM repair kit avalable for the modulator part of the unit. On other models the part is only sold as a complete pump unit which can be expensive.
We offer the alternative of having the unit reconditioned and rebuilt. This is significantly cheaper but has a time implication of approximately ten days off the road.
The process starts with diagnosis and confirming that the pump is the cause of the problem experienced.
Unfortunately the location of the rings on the driveshafts open to the elements and salty road spray menas that both the driveshafts and the reluctor rings develop corrosion.
The reluctor rings eventually swell and deform to a point where the sensor data collected is so far out of expected tolerance levels that an error code is triggered for the sensor. However it may not be the sensor that is faulty, it may be the corroded reluctor ring.
The BMW approved solution to a corroded reluctor ring is to replace the entire driveshaft(s) which come with shiny new reluctor rings. Unfortunately they also come with a hefty pricetag. We offer an alternative solution which is to remove the old reluctor rings, decorrode the driveshaft and install a new reluctor ring to the original driveshaft at a fraction of the cost.