Audi A4 B5, ABS/Dashboard insert electrical connection

Hello everyone,

My Audi (VIN: PD-AJM, see signature), see signature, is causing me some frustration...
Sporadically, the ABS symbol, the ASR symbol, and the "red" brake symbol appear intermittently (approximately once a month) in the FIZ, accompanied by approximately three beeps.

Initially, it appeared about 3 months ago (without any error logs), and today it has occurred 2 times (but with error logs).

Noteworthy: This happened twice today, with me being slightly leaning to the left and at a slight angle, and with the current weather conditions, I was quite warm.

Is this (hopefully) a well-known error?
Options:
-ABS Control Unit
-Cable break
-AI has a path (which wouldn't be so far-fetched, given the Jaeger AIs)

1 Error found:
01203 - ABS/Control Unit Electrical Connection
03-10 - No signal - Sporadically

P.S.:
The recorded mileage does not match; it has been replaced before, and the vehicle has approximately 410000 km...

Good evening, could you please check the level of the brake fluid? I've found that a low level on the B5 model always resulted in the brakes being sensitive and making a "beep" sound three times.

Level can be ruled out; is max.
Was I checked first.

I mean, then only the "Brakes" symbol would appear in the FIZ, without the ABS and ASR symbols.

Regardless; I searched online, and it appears to be a common issue with Passat 3B, A4 B5, etc., which have this type of ABS.

That's the only option: exchange or repair. I'm only considering the latter option, as it's a specific type, which is less common online (ABS, ASR, EDS).

Hello everyone;

Error cause definitely found!
It is, in fact, the ABS control unit.

After researching online, I soon had certainty about the source of the problem and how to fix it.

**Introduction:**
Not suitable for beginners, and requires a VERY GOOD soldering experience, and therefore professional tools!
A little bit of trembling, and the small bonds next to the actually broken ones have come loose.

And:
If it's already open, the control unit can understandably no longer be sent for repair!

Just for illustration purposes: On the housing side, the connector is approximately 1.3mm in size, estimated.

Therefore, keep your hands away if there is no "Plan B"!