Why is the brake pedal in my BMW Z4 becoming hard to depress?

I've noticed that the brake pedal in my BMW Z4 has become increasingly harder to depress over time. It doesn't seem to affect the braking performance, but it is definitely more difficult to push down. Is this normal for a sports car like this or should I have it checked out?

It is not normal for the brake pedal to become hard to depress over time. This could be a sign of a potential issue with the brake system, such as a blockage or air in the lines. I would highly recommend having your car inspected by a trusted mechanic as soon as possible to prevent any potential safety hazards.

I've had the same problem with my BMW Z4 before. It turned out to be a build up of dirt and debris on the brake pads, which can cause friction and make the pedal harder to push. Try giving your brakes a thorough cleaning and see if that helps.

Have you recently changed your brake pads? If so, it could be that the new pads are slightly larger than your old ones, leading to a harder brake pedal. This is a common issue and can be easily fixed by having the pads professionally shaved down to the correct size.