chain
It has a chain.
The chain will last the life of the engine and there is no recommended change interval.
Timing chains are designed to normally last the life of the engine and are replaced when the engine is rebuilt.
No, it is a chain.
There is no cabin air filter in a Z3.
louisville slugger
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 general rule of thumb is at or around 100k miles. this varries with manufacturer, but it is best to always replace no later than 125k
http://e30world.com/Maintenance/BMW-E30-Sparkplug-Change
no
How do you charge a 2002 BMW Z3 battery