Faults:

The DISA valve frequently fails, and, being made of plastic, its internal parts wear out, causing power loss and metallic noises in the intake manifold.

The gaskets most prone to leaking or sweating oil are the rocker cover gasket, the oil pan gasket, and the oil filter housing gasket.

Failures in the electric water pump and thermostat after 100,000 km.

Regarding electrical faults, it's common to see the ABS, parking brake, and traction control lights illuminated on the instrument panel. This is usually due to a fault in the ABS control module (MK60 unit) or the steering angle sensor.

General Comments:

The Roadster's design, even today, is controversial for many. I personally love it, but I know others don't like this type of car.

The BMW Z4 M Roadster is a truly fast car, but the best thing about it is that it was passionate and not as filtered as most modern automobiles. Its engine isn't turbocharged, and the gearbox is manual, which adds to the overall purity. To top it off, it has a soft top, not a retractable metal one. It maintained the pure essence of a classic roadster: a very long hood, a very rearward-mounted engine, and occupants sitting almost over the rear wheels—characteristics that create a very long, low, and sporty appearance.

The best thing about this car is hidden from view: its powerful engine. A naturally aspirated, 3,246cc inline six-cylinder, capable of producing 343 hp at 7,900 rpm and 365 Nm of torque at 4,900 rpm. All of this power is sent to the rear wheels via a six-speed manual transmission, which connects to an electronically controlled limited-slip differential (multi-plate clutch) and does away with traction control… so it's not a car for inexperienced drivers. This also makes it very tricky to drive fast on roads that aren't perfectly smooth.

Let's talk about the suspension and brakes.

The suspension ride height is 10 millimeters lower than the Z3, while also being firmer. The wheels have a specific alignment, with more caster, less toe-in, and more camber.

The brakes are perforated and ventilated, with two 345-millimeter front discs and 328-millimeter rear discs, with single-piston floating calipers—quite small, by all accounts.

It's certainly not a car for people unfamiliar with high-speed sports cars, but for those seeking a car with these characteristics, the Z4 is clearly a viable option today. All with proper maintenance and care, of course.

Faults:

Nothing to date.

General Comments:

Extremely fun to drive, especially with the top down. Enjoy the handling and acceleration. This is by far my favorite car that I have owned. I have always wanted a Z4 and this one has not disappointed. A true sports car.

Much better fuel mileage than I expected is a bonus.

Faults:

- Radiator fan.

- Center electric powered screen.

- Com box.

- Center console clips for wood trim.

- Left rear shock.

- Hinge for center arm rest.

- Various seals and bushings for hard top.

General Comments:

Owning this car is like being with a supermodel; it looks beautiful, and it is fun to take for a drive, but it will break your heart.

This was purchased as a second car, I've had it 9 months and it's been in the dealer service center over 42 days since I purchased it. I love it, it drives great, it sounds great, it is the ultimate driving machine, but it spends too much time in the shop.

I'd write more, but I got the news today about the shock in the rear that has to be ordered. So I'm quite upset, I have a lot of positive things to say about the car in terms of how great it is, but all I can think about is how I've spent more time driving their loaner cars than I've driven mine. If you like that, get one, if you don't, don't.

I haven't even had my first 10,000 mile service yet and it's been in the shop 10 times. I calculated that 1,000 miles of the 8400 miles on its odometer have simply been driving it in for service. This is not stress free.