Fiat Alfa Lancia Jeep Diesel manifold

The intake manifold with original code 55231272 is a component used on 1.6 MultiJet and 1.6 CDTI diesel engines from the FCA and Opel groups. It is a manifold made of reinforced plastic material, designed to direct the intake air towards the cylinders and to optimize mixing thanks to the swirl system.
This manifold may include or be prepared for the swirl throttle actuator, which regulates the airflow based on engine load and speed conditions.

Technical features

• OE Code: 55231272
• Material: high-resistance thermoplastic reinforced polymer
• Internal structure with 4 separate ducts to feed the cylinders
• Integrated swirl system with movable blades and 4-pin electric actuator (depending on the version)
• Preparation for air temperature/pressure sensor and EGR connection
• Connections for vacuum fittings or external MAP sensors
• Average weight: between 1.8 and 2.2 kg

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

Functionality

The manifold distributes the intake air evenly to each cylinder. The swirl vanes inside the ducts create turbulence targeted at low loads and speeds, improving combustion and reducing pollutant emissions.
The electronic actuator automatically controls the opening and closing of the vanes, receiving commands from the engine control unit based on parameters such as pressure, temperature, and accelerator pedal position.

Make and model on which the part is installed

Fiat

• Doblò (Bus, Cargo, Flatbed)

Opel

• Combo (Van/Spacious limousine)
• Combo Tour

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

Defects and causes

The most common problems affecting the 55231272 manifold are:

• Sticking of the swirl blades due to soot or vaporized oil buildup
• Breakage of the electric actuator that controls the opening/closing of the swirl vanes
• Check engine light on and performance drop due to improper airflow management
• Error codes related to abnormal airflow caused by internal malfunctions
• Cracks or deformations of the plastic body, which can cause parasitic air intake or pressure loss in the manifold

Final conclusions

The OE intake manifold 55231272 is a fundamental element for the proper management of airflow in FCA and Opel 1.6 Multijet/CDTI diesel engines. Its performance is closely linked to the functionality of the swirl system and the electronic actuator.
DIPA provides components in new, original, and aftermarket versions of equivalent quality, ready for installation, with warranty and compatibility across all affected models. Ask about the availability of ready-stock spare parts for quick replacements and reduced vehicle downtime.