Shoring up thecooling system inthe 99 E36 Convertible. Found a way to avoid pulling intake manifold. 1 hr instaed of 6hrs. Minimal removal to gain access and the 90 degree angle adapter to provide torque. I read somewhere about using an extension but wasn't well explained. Here is my version so I hope it helps
1.First pic is removal of airtbox and oil filter cap.
2. Remove oil supply line to vanos...replace washers(2)
3. Place deep socket 22mm or 7/8in over sensor and then angle adapter into socket. Remove and reverse reinstall...torgue to apprtox 180inlbs lke a spark plug. You will lose some coolant so drain is a good idea.