Mazda 6 2.2 Diesel Problems

The Mazda 6 is a popular mid-size sedan, known for its sleek design, excellent handling, and reliability. However, as with any vehicle, it’s not without its share of problems, especially in some of the diesel variants. Based on shared experiences of various Mazda 6 owners, here’s an overview of the most frequently reported issues with the second-generation Mazda 6 diesel, predominantly from the 2009-2010 model years, and the potential solutions.

1. DPF (Diesel Particulate Filter) Issues:

• Problem: One of the primary issues revolves around the DPF. In some models, especially the 2.0 diesel variant, failed DPF regenerations can result in diesel being dumped into the engine oil. If unchecked, the oil level can rise until the turbo consumes it, causing the engine to run on its own oil. Some users have pointed out that the Mazda design has a return that can cause the oil sump to over-fill.
• Solution: Regular DPF cleaning can mitigate this problem. Additionally, it’s crucial for owners to keep an eye on the oil levels and ensure they don’t rise to dangerous levels. It’s also recommended that Mazda 6 owners, especially those with shorter commutes, ensure their vehicle goes through regular DPF regeneration cycles to prevent blockages. Some owners mentioned that Mazda offers DPF regeneration services for around £50.

2. Engine Choices:

• The 2.0 diesel engine seems to have had more issues than the 2.2 variant. Mazda phased out the 2.0 in favor of the 2.2 by 2008 due to the former’s problems. The 2.2 diesel engine, on the other hand, was generally considered reliable and less problematic than the 2.0.

3. Interior Plastic Durability:

• Problem: Some users noticed that the plastics used in the newer Mazda 6 models, especially on the door, do not age well. They often become scratched or have their coatings peel off.
• Solution: While not a mechanical issue, it’s something prospective buyers should check when considering a used Mazda 6. It might also be worth exploring aftermarket solutions or replacements if this becomes a concern.

4. Recalls:

• Timing Belt/Chain: One of the significant recalls mentioned is related to the timing belt or chain. There was a concern that the chain could stretch and cause damage.
• Tyre Pressure Sensors: The original tyre pressure sensors in some Mazda 6 models were prone to failure due to a design flaw. These were subsequently replaced with more durable rubber sensors.
• Solution: Before purchasing a second-hand Mazda 6, it’s advised to check if all recall-related repairs have been made on the vehicle.

5. Other Points to Note:

• While some owners reported no significant issues and have driven their Mazda 6 diesel cars for over 100,000 miles without problems, regular service and maintenance are critical.
• The DPF problems seem to be more pronounced for those who do short commutes. A longer daily commute, especially on the motorway, might help in preventing DPF related issues.

In conclusion, while the Mazda 6 2.2 diesel is a solid choice for many, potential buyers should be aware of the common problems and ensure that they take preventative measures or address issues as they arise. Regular maintenance, being informed about recalls, and understanding the specific needs of diesel engines, particularly concerning the DPF, will go a long way in ensuring a smooth driving experience.