New Exhaust Manifold Fiat 0.9 Turbo

Typical Defects:
Formation of internal or external cracks in the manifold
Exhaust gas leakage from the manifold
Excessive noise coming from the engine compartment

The OE code 71795018 identifies the exhaust manifold fitted to 0.9 TwinAir turbo engines produced by the FCA group. This manifold is an integral part of the turbocharger unit, as it is the duct that collects exhaust gases from the two cylinders and directs them to the turbine. The component is designed to withstand the high temperatures and pressures generated by the two-cylinder turbo engine, and plays an essential role in ensuring correct boost and controlling emissions.

Technical characteristics

• Material: high thermal-resistance cast steel
• Structure: one-piece, with integrated flange for the turbocharger
• Mounting: direct attachment to the cylinder head and to the Mitsubishi turbocharger
• Turbine compatibility: Mitsubishi series 49373-03000 / 03012
• Provision for a mechanical wastegate valve

DIPA offers a range of original and aftermarket parts of equivalent quality.

Functionality

The exhaust manifold channels the exhaust gases produced by combustion toward the turbine. In TwinAir engines, characterized by variable revs and dynamic response, the manifold must ensure an even distribution of flow and withstand extreme thermal cycles. In addition, it must ensure a precise coupling with the turbine to avoid pressure losses that would reduce boost efficiency.

Brand and models on which the part is mounted

• Fiat 500
• Fiat Panda
• Fiat Punto
• Fiat 500L
• Lancia Ypsilon
• Alfa Romeo MiTo

DIPA recommends always checking the compatibility of the spare part before purchase.

Defects and causes

The main problems found on the 71795018 manifold include:

• Cracks in the area where it connects to the turbine, due to cyclic thermal stresses
• Flange deformations, which can compromise the gas seal
• Wear or ovalization of the wastegate seat, resulting in loss of turbo pressure control
• Unusual exhaust noises, caused by micro-cracks not visible to the naked eye
• Loss of power and overboost, caused by irregular flow or unstable pressure

These issues are aggravated by heavy urban use, overheating, or inadequate lubrication of the turbine-manifold system.

Final conclusions

The OE 71795018 exhaust manifold is a critical component for the correct operation of 0.9 TwinAir turbo engines. Its specific design requires heat-resistant materials and a precise fit with the turbine.

DIPA offers a wide range of spare parts: from original items to aftermarket parts selected among the best manufacturers on the market. It also provides reconditioned components restored to like-new performance, offering cost savings on replacements and contributing to environmental protection through the circular economy. If the part you need is not available, don’t worry: DIPA can recondition your part "on demand", returning full functionality and safety in a short time.