Well having owned a Z3 2.2i for sometime, but now owning a Z4 2.2i I thought I'd fit a new water pump,belts,thermostat etc.Must be similar? Very accessible on the Z3. So why did BMW decide to put the support frame behind the radiator right in front of the engine on the Z4?? BMW recommend removing the front of the car to do the job.I see from looking into it that it is possible to wiggle the pump out by lifting the engine on one side . Not something I'm up for in my cramped garage with the tools I've got so it's off to my trusted independent BMW man.