The one that I have had for over 4 years had to have the lower control arms replaced and also new brake rotors. It also had an aux water pump go bad. Such stuff like a new oil pressure sensor and oil level sensor, which were minor. I had to replace a sensor in the auto tranny because of intermittent Trans Program messages, but the tranny always worked fine. This cost several hundred dollars. The most significant repair was to fix a very small leak in the auto tranny. A seal had to be replaced and it cost about $800. Oh, I forgot one that was even more. The A/C compressor went bad and I had it replaced at the BMW dealer which was quite expensive - over $1,200, as I recall.
The other 1991 525i that we bought a couple of years ago has had a lot fewer problems. I had a water pump go bad and that is about it, other than really minor stuff like a power steering fluid leak. The engine on it has been chattering after it is really warmed up, and I suspect that one of the valves is sticking. Since they are not adjustable, I might have to get them replaced.
I love these cars, both because they are fun to drive and still very reliable even after many miles and 13 years.
Dick Schneiders (2, 1991 525i's)
Originally Posted by Phil Sanderson