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Greetings.
After owning my e92 330i (N53) for around 8 years, I want to replace it next year, since it has reached a mileage of 160,000.

Given my limited use, I would want to maintain its operation during the remainder of this year.

Lately, at irregular intervals, my dashboard has been displaying warnings for Tyre Pressure monitor failure, cruise control failure, ABS failure, and DSC failure. This phenomenon is fairly sporadic, and sometimes it ceases to exist.

I am not an expert mechanic, but I do possess a certain level of competence. Initially, I speculated that the problem may be one of the ABS/wheel speed sensors. After doing some online research, it seems that typical faults associated to this problem include ABS sensors, steering angle sensor, and faulty wiring to the DSC Module.

I am uncertain about how to determine its identity. I have successfully installed INPA, and the DSC Unit displayed many problem codes that I have subsequently resolved. The error code "5D96 - Drehrichtungserkennung vorne links" has remained unchanged after the reset.
"5D91 - Front left speed sensor extrapolation"

Based on my online research, it seems that the issue is likely related to the ABS sensor, namely the front left one.

However, I have seen that when I access INPA and get real-time analogue updates for the wheel speeds, it works temporarily. Ultimately, I will inevitably experience a disconnection from the DSC module, rendering me unable to reestablish a connection. Based on my limited attempts so far, this disconnection is promptly followed by the reappearance of the aforementioned lights. Based on the evidence, it seems that a faulty wire may be the cause of the communication failure with the DSC module.

Does anybody have any suggestions on how I can further narrow down the issue to either the wiring, wheel speed sensor, or another potential cause? Alternatively, any ideas on how to eliminate some of these possibilities?
Thank you in advance

The front ABS sensor is often the last component to malfunction, and the ring is an integral element of the hub.
An effective method to test the back and temporary solution is to remove the sensor and place a thin washer below the bolt hole, therefore slightly elevating it from the reluctor ring.
I have not used the washing approach on the front, so I am uncertain about its effectiveness in that area.

The washer is not functional on the front side since the sensor detects the tone wheel on the side, rather than the end.

The issue may be attributed only to the sensor.

The potential cause may be solely attributed to the sensor.

I have never interacted with the front part of a vehicle, but I just installed a new hub, which was not a difficult task.