DACIA SANDERO LPG TANK: WELDING DEFECTS AND LEAK RISKS

Dacia Sandero LPG – We analyze reported welding defects in the LPG tank, the risks of leaks, the most common symptoms, and how to check if your vehicle is part of the official Dacia 2023–2025 recalls.

Read Also: DACIA SANDERO PROBLEMS 2014–2025: WHAT TO KNOW BEFORE BUYING

Updated on November 10, 2025 • By the Autoricambi Tritella technical team

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✅ Introduction

In recent years, LPG (Liquefied Petroleum Gas) has gained a significant share of the car market in Italy due to its economic and environmental advantages. However, some vehicles such as the Dacia Sandero LPG have shown problems related to the storage tank, particularly welding defects that can lead to gas leaks.

A structural defect in an LPG tank is not just any fault: it is a primary safety issue that must be addressed promptly. In this guide, we analyze the reported cases, the real risks, and the inspection and recall procedures provided by Dacia.

⚙️ Welding defects in the LPG tank

🔧 What are the most frequent causes?

Anomalies in tank welding can result from several factors:

• Production defects in the welding process or insufficient leak testing.
• Non-compliant materials with resistance standards or excessively thin alloys.
• Mechanical stress from vibrations and thermal cycles of LPG pressure.
• External corrosion in underbody areas exposed to salt and humidity.

A small welding defect can reduce the tank's seal and, over time, develop into a micro-leak, leading to progressive gas loss.

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🚨 Symptoms of a faulty weld

Recognizing the first signs of a faulty tank is crucial to avoid serious consequences. Here are the most common symptoms reported by motorists:

• Gas odor around the vehicle, especially after refueling.
• Difficulty starting or automatic switch to gasoline operation.
• Reduced range compared to usual LPG mileage values.
• Metallic noises or vibrations coming from the underbody.
• Abnormal consumption or sudden power drop.

If these symptoms are observed, immediately stop using the LPG system and request a diagnosis from a specialized workshop.

🔥 Risks and consequences of LPG leaks

LPG leaks, in addition to damaging the system, pose potentially serious risks to people and the environment:

• Fire hazard: LPG is highly flammable, even in small quantities.
• Gas poisoning: in enclosed spaces, inhalation can cause nausea and loss of consciousness.
• System deterioration: escaping gas can compromise valves, pipes, and sensors.
• Environmental impact: release of hydrocarbons into the atmosphere and soil contamination.

Never attempt DIY repairs: the LPG tank operates at high pressures and requires certified tools.

🧰 Inspection, recall, and prevention

🔎 How to check for leaks

If you suspect an anomaly, you can perform an initial safety check:

1. Visual inspection: look for traces of corrosion or deformation near the welds.
2. Soap and water test: any bubbles indicate a micro-leak.
3. Technical inspection: in a workshop, an electronic gas detector (sniffer) is used to confirm the leak.

📢 Official Dacia recall

Dacia has issued several recall campaigns related to the LPG system, particularly on Sandero and Logan models produced between 2017 and 2023. To check if your vehicle is affected:

• Visit the official Dacia Italy – Recall Check website.
• Enter the Vehicle Identification Number (VIN) found on your registration document.
• Alternatively, consult the Motorist's Portal for national recalls.

🧩 How to prevent future problems

• Perform periodic checks at an authorized LPG center every 12 months.
• Replace the tank every 10 years, as required by Ministerial Decree 23/01/2012.
• Avoid excessive refueling: never exceed the 80% limit of the tank.
• Use quality LPG and check the system's cleanliness at each maintenance.

❓ Frequently Asked Questions

📌 Conclusions

Welding defects in the Dacia Sandero LPG tank represent a risk not to be underestimated. Although cases are rare, caution is essential: periodic checks and attention to symptoms can prevent accidents and high costs.

In case of suspected defect or leak, always contact a certified workshop and check for official Dacia recalls. When it comes to LPG, safety does not allow for compromise.