Vauxhall Astra 1.7 CDTI Common Problems

Are you considering a Vauxhall Astra 1.7 CDTI, either from the late Astra H or early Astra I generation? These diesel-powered Astras have gained popularity for their efficiency and reliability, making them attractive options for those who spend a significant amount of time on the motorway. However, like any vehicle, they are not without their common issues. In this article, we’ll explore these problems and provide possible solutions.

The Sturdy 1.7 CDTI Engine

The 1.7 CDTI engine has a long history and a reputation for sturdiness. While it’s generally a reliable choice, it’s essential to be aware of potential problems that some owners have encountered.

Oil Pump and ECU Failures

Some owners have reported issues with the oil pump and ECU failures. In particular, the solder joints on the ECU can break, leading to electrical malfunctions. Regular maintenance and electronic checks can help detect these issues early, preventing costly repairs down the line.

Astra H and Early Astra I

The Astra H and early Astra I models equipped with the 1.7 CDTI engine have earned a reputation for reliability. However, there are some specific problems to watch out for.

Boost Solenoid and Vacuum System

Owners of these models have mentioned problems with the boost solenoid and vacuum system. Regular inspections and maintenance of these components can help prevent issues related to power delivery.

Astra H/J CDTI Models from Late 2010 Onwards

Astra H/J CDTI models manufactured from late 2010 onwards come with some unique considerations:

Euro 5 Emissions Standard and DPF Issues

These models comply with the Euro 5 emissions standard and are equipped with a Diesel Particulate Filter (DPF). The DPF has been a source of problems for some owners, particularly those who primarily drive in urban environments or for short distances.

Possible Solution: If you plan to purchase one of these models and primarily drive in city traffic, consider taking it for occasional longer drives on the motorway to allow the DPF to regenerate. Regular servicing can also help monitor the DPF’s condition and address any issues promptly.

Different ECU and Reliability

Late 2010 onwards models run on a different Electronic Control Unit (ECU) compared to their predecessors. Some owners have reported that the newer ECU may not be as reliable.

Possible Solution: Regular diagnostic checks and software updates from Vauxhall dealerships can help address any ECU-related issues.

Astra 1.9 CDTI Models

While the 1.9 CDTI models can be reliable, they are not without their own set of potential problems:

Common Issues

• Water Pump: Keep an eye on the water pump, as it can develop issues over time.
• Cam Belt Tensioners: Tensioners for the cam belt may require replacement as part of routine maintenance.
• 6-Speed Gearbox: Some models may experience problems with the 6-speed gearbox.
• Alternator Weakness: The alternator can be a weak point and may require attention.

Swirl Flap Rod Seizing (150PS Models)

The 150PS versions of the 1.9 CDTI can be more susceptible to problems, including swirl flap rod seizing on the inlet manifold, leading to various running issues.

Possible Solution: Replacing the inlet manifold with a modified version can address this problem, although it may come at an expense.

Fuel Quality Matters

Regardless of the specific Astra model you choose, it’s essential to consider the quality of the fuel you use. Many CDTI engines, including the 1.7, respond well to high-quality diesel fuel, such as V-Power, which helps maintain crucial engine components like injectors, EGR, and the inlet manifold.

By using high-quality fuel, you can potentially prevent some of the common issues associated with these engines.

Conclusion

The Vauxhall Astra 1.7 CDTI can be an excellent choice for those seeking efficiency and reliability for their daily driving, especially on motorways. While there are common problems associated with specific models and their engine variants, regular maintenance, diagnostic checks, and occasional long drives can help mitigate these issues.

Remember that proactive maintenance and addressing potential problems early can save you time and money in the long run. It’s essential to purchase a well-maintained used Astra with a complete service history for peace of mind.