Secondary Air Valve - Pierburg (7.01510.31.0)
2008-2017 Pierburg (701510310)

Technical information
- Directly behind the cylinders, exhaust gas is removed and mixed back into the intake air. This ensures that less oxygen gets into the cylinder, and less oxygen means a lower combustion temperature. With the exhaust gas recirculation process, the nitrogen oxide in the raw exhaust gas is reduced by up to 70% and the air flow is also significantly reduced. In gasoline engines, this also reduces carbon dioxide emissions and fuel consumption.
- Due to increasingly stringent emission standards, an increasing amount of exhaust gas needs to be recirculated. This results in a great number of components being added to the EGR system over time. Vehicles that are compliant with the Euro emission standard typically use a combination of a cooled high-pressure and low-pressure EGR. In addition to the high-pressure and low-pressure EGR valve itself, a modern EGR system like this also contains a regulating throttle, swirl regulation flaps, an air mass sensor, one or more EGR coolers and an exhaust gas flap, for example.
Diagnostic information
- Due to the interplay of numerous components, it is often the case that faults do not appear on the component that is actually defective. A fault in the EGR system is usually detected by the air mass sensor and interpreted in different ways depending on the vehicle manufacturer. It is therefore necessary to carry out a check of the entire EGR system including all components. Even in the event of a carbonized EGR valve (the most frequently occurring fault), all of the connected components including the hosing must be checked for contamination.
- The cooled EGR system presents a particular challenge for the diagnostic capabilities of a repair shop. EGR coolers are cooled using water. In the event of a leakage, the water is added via the exhaust gas recirculation of the combustion system. The symptoms here are identical to those of a defective cylinder head gasket.
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Product Details
Installation GuideDescription
Technical information
- Directly behind the cylinders, exhaust gas is removed and mixed back into the intake air. This ensures that less oxygen gets into the cylinder, and less oxygen means a lower combustion temperature. With the exhaust gas recirculation process, the nitrogen oxide in the raw exhaust gas is reduced by up to 70% and the air flow is also significantly reduced. In gasoline engines, this also reduces carbon dioxide emissions and fuel consumption.
- Due to increasingly stringent emission standards, an increasing amount of exhaust gas needs to be recirculated. This results in a great number of components being added to the EGR system over time. Vehicles that are compliant with the Euro emission standard typically use a combination of a cooled high-pressure and low-pressure EGR. In addition to the high-pressure and low-pressure EGR valve itself, a modern EGR system like this also contains a regulating throttle, swirl regulation flaps, an air mass sensor, one or more EGR coolers and an exhaust gas flap, for example.
Diagnostic information
- Due to the interplay of numerous components, it is often the case that faults do not appear on the component that is actually defective. A fault in the EGR system is usually detected by the air mass sensor and interpreted in different ways depending on the vehicle manufacturer. It is therefore necessary to carry out a check of the entire EGR system including all components. Even in the event of a carbonized EGR valve (the most frequently occurring fault), all of the connected components including the hosing must be checked for contamination.
- The cooled EGR system presents a particular challenge for the diagnostic capabilities of a repair shop. EGR coolers are cooled using water. In the event of a leakage, the water is added via the exhaust gas recirculation of the combustion system. The symptoms here are identical to those of a defective cylinder head gasket.
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