View Bmw M40 Engine Problems Background. The only problem is there is no descriptions on the bmw computer so he was clueless to what one it was. Common bmw b58 40i engine problems.
Not saying n63 is top bmw engine i do believe if you keep up with regular maintenance its good engine.
Main engine fan (electric) is bad or fan clutch not working anymore, though even with a bad fan clutch and fully working cooling since 2004 bmw uses only electric fan for both ac and engine, so if it goes bad, you will get overheating. In the end we took a gamble and ordered the now i have a new problem, since fitting the temp sensor the car will not fire when the engine is warm. The only problem is there is no descriptions on the bmw computer so he was clueless to what one it was. It uses a camshaft belt like the 6 cylinder m20.
