Possible causes of failures of an intake manifold:

1. Thermal cycle fatigue: The intake manifold experiences alternate heating and cooling cycles during engine operation, which can lead to material fatigue and cracking, especially in the case of plastic manifold.

2. Material defects: Defects in manufacturing processes or materials may cause the intake manifold to crack or fail more easily.

3. Improper installation: Improper installation techniques, such as overtightening bolts or using inappropriate gaskets, may result in bending or damage to the installation points.

4. Vacuum leakage: If the intake manifold or its gasket leaks, performance issues and stress may occur and cause cracking.

5. Impact damage: Physical impact resulting from accidents or road debris may cause the manifold to break or fail.

6. Corrosion: In some cases, the intake manifold can be exposed to moisture, road salt, or chemicals, which may lead to metal corrosion and consequently material degradation and failure.

7. Coolant leakage: In some vehicle models, if there is a coolant path in the intake manifold, coolant may enter the intake in the case of leakage, which will lead to internal damage and performance issues.

8. Engine knocking: Abnormal combustion or "knocking" may result in an increase in pressure and heat, thus damaging the components of the intake manifold.

9. Aging and wear: As all components of the engine wear over time, the intake manifold (especially in the case of plastic manifold) may become vulnerable.

10. Low fuel quality: Low-quality fuel may lead to incomplete combustion and increased engine pressure, which can exacerbate manifold damage.

Improvement solution adopted by vika intake manifold:

1. The vika intake manifold features an optimized intake flap and a control lever upgraded from plastic to stainless steel, leading to a longer service life.

2. It provides high-precision sensing function comparable to OE products.