After the ABS only sporadically, then more and more often and at the end almost no longer worked at all and he said the error message was “wheel sensor defective, proved again the value of our forum here. These are quite exactly the symptoms of the typical soldering problem in the ABS control unit. What he takes for a standard repair, we rather shun over it. There are companies that work up the control units, but there are then also 200 €. There are still these and this The details are well illustrated in the above instructions, so only a few additional comments from me: Since you only take off the electronic part, you can even drive without it, but should not, because the tacho does not work. The four screws are somewhat exotic, such a kind of inverse torx, i.e. cones instead of hole, but you can easily use a 4-mm plug. Since the whole thing hangs diagonally down, you don’t see anything, but it still works quite well. I got the ring clamps on the four screw sleeves down with a small screwdriver and at the end also put on it again. The opening of the seal is guaranteed not without damage to the housing. But that’s not so bad. I broke the outer collar of the lower part all around (it breaks almost by itself), then as much silicone as possible out of the body. The circuit board sits close to the edge. If you have destroyed enough silicone, you can get the lid down well. On the circuit board there is a transparent cover, which can be pulled off visibly. The best way to remove the areas to be soldered completely, it is no longer airtight at the end of the day. I soldered all the contacts on both sides of the circuit board. cker, that works with a normal (not very small) electronic soldering iron, some colophonium and additional soldering quite well, if necessary you have to stay on it until everything is properly heated and the solder flows properly. I sealed the whole thing again with a Uhu polymer sealant, silicone goes too, but I didn’t want to start a complete cartridge for the few grams. Conclusion: Almost two hours of work and a few cents for the sealing material, and the ABS goes again. that makes more often, certainly does not take more than an hour. So companies like this have a very interesting margin … well, market economy just, besides, one has to give as a commercial provider warranty, insofar as I am far from criticizing.