Faults:

It is the most well-known failure. Chain stretching and guide wear cause a metallic noise upon startup or at low RPM. The variable valve timing (VVT) system is also prone to failure.

Due to direct injection and the turbocharger, the engine may consume more oil than normal or develop leaks. The turbocharger's restrictor bolt can cause lubrication issues.

The factory mounts are flimsy and tend to give way over time. Additionally, the rear differential bushing is soft, which can place excessive load on the drivetrain during hard acceleration.

The bodywork lacks deep galvanization, so it is vital to inspect the rear subframe, engine bay, and underbody for rust.

General Comments:

The Mazda 6 MPS is a high-performance variant of the mid-size Mazda 6 sedan.

The exterior design of the Mazda 6 MPS also reflects its high-performance nature. It features a sporty body kit with unique front and rear bumpers, side skirts, and a rear spoiler. Additionally, it is equipped with larger wheels and tires, as well as a stiffer suspension system to enhance handling and performance.

Inside, the Mazda 6 MPS boasts a sporty cabin featuring ergonomic front seats, a leather-wrapped steering wheel, and aluminum pedals. The car also comes standard with a high-quality sound system, automatic climate control, and a navigation system.

Overall, the Mazda 6 MPS was a well-rounded sports sedan offering impressive performance, elegant styling, and a comfortable, well-equipped interior.

Let's look at the car's downsides.

The main issue here is rust. This occurs primarily in cold climates (such as Sweden), where corrosion is excessive—specifically around the subframe and door sills towards the rear of the car.

The paint is very thin and prone to fading if not rigorously maintained and cared for.

As for the interior, there are faults in the climate control system—ranging from issues with air recirculation to the air conditioning simply failing to respond to commands.

The seat stitching—especially on the driver's seat and particularly in leather models—can come loose and break.

The leather itself can also wear out quite quickly if not properly cared for.

Small lights behind the air conditioning controls may go out, but a light tap usually fixes the problem.

In general, if well-maintained, kept in its original condition, and driven carefully, the MPS can be an extremely reliable and trouble-free car.

The problem is that finding a project management service provider that meets those requirements is extremely difficult.

Problems with the PCV system cause the engine to run with a lean mixture—much like occasional issues with fuel injectors or fuel pressure—not to mention that excessive turbo boost or a poor engine map can also lead to a lean running condition, potentially resulting in burnt valves or even piston failure.

For anyone looking to buy a car like this—a sports car that is already over 20 years old—the recommendation is to find one with a complete and exhaustive service history, one that has clearly been meticulously maintained throughout its life and shows no signs of abuse or neglect.

This applies to any car, but given that the Mazda 6 is a delicate vehicle requiring significant maintenance, it is always preferable to own one that has been thoroughly pampered by its previous owner.

Faults:

DPF, clutch and DMF noise, brake discs, exhaust, suspension springs, rust starting at wheel arch, etc.

General Comments:

Good looking car, the last of the older generation Mazda 6. I had this car for a couple of years when it was only about 5 years old and low mileage.

Seriously fun to drive for a family car. Engine pulled strong while still doing around 47 MPG. 6 speed manual was fun to use.

Interior nice, stylish and comfortable. Seats very supportive. Bit of a blind spot when reversing, but you get used to it as per modern car.

So it was a good looking and economical fun to drive car, but I dunno if I'd buy another - there was already rust at 5 years old and the DPF was expensive to replace; the car was heading towards the typical diesel faults by the time I was getting rid of it. Mazda main dealer was terrible and always overcharged. In the end I had to find an independent mechanic to fix it cheaper, but he recommended I get rid of it, the diesel version of this car is nothing but trouble as it ages, I can only recommend a petrol Mazda 6.