To change the oil depends on the engine model. Check your engine model first in the registration and go to the technical information in your BMW z3 booklet. To compensate the leaks or oil consumption (oil burned in the engine) you have to check the level on the dipstick. The oil level in the engine (cold) should be between the two signs on the dipstick. Never over fill and use the same quality of oil.
6.9 liters
6.9 quarts
The BMW z4 replaced the BMW z3 in late 2002. The BMW z3 was introduced in 1996 shortly after staring in a James Bond movie. Not as easy on the eyes as the z3 but just as nice.
the 328i BMW if it is the M52 engine should be using 5w30 synthetic oil, same as the 2.8 Z3
no
7 US quarts
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The Z3 oil capacity depends on the engine/model. 1.8i - 4 liters 1.9i - 5 liters 2.5i - 6.5 liters
Assuming you are referencing a manual transmission, Automatic Transmission Fluid (ATF) is specified by BMW for Z3 manual transmission. Sounds crazy, but true. Full synthetic is also recommended. **Always check the owners manual before using any fluids**
The sensor is located at the front of the engine near the oil filter housing. To the left of the housing. 2.5 Z3