Lancia Engine Control Units – ECU by Part Number

Lancia Engine ECU – Bosch and Magneti Marelli Control Units

A Lancia engine control unit may also be described as an ECU, ECM, engine computer or engine management controller. Depending on the engine and generation, the module manages functions such as fuel injection, ignition, turbocharger control, emissions-related systems and communication with other vehicle modules.

Lancia vehicles use several ECU families from manufacturers including Bosch and Magneti Marelli. Correct identification should always be based on the complete numbers printed on the original controller.

How to choose the correct Lancia engine ECU

Before ordering a replacement controller, compare:

• the complete Lancia / Fiat Group OEM number,
• the Bosch or Magneti Marelli manufacturer number,
• the complete IAW or MJD designation where applicable,
• all suffix letters and digits,
• HW and SW references where present,
• vehicle model and engine version as supporting information.

The vehicle model alone is not enough to confirm ECU compatibility. The same Lancia model can use different controllers depending on engine version, production period and electronic configuration.

Magneti Marelli Lancia engine ECUs

Magneti Marelli supplied a large number of engine controllers for Lancia and other Fiat Group vehicles.

Important families include:

• IAW16F...,
• IAW49F...,
• IAW5AF...,
• MJD6...,
• MJD8....

The family name alone does not identify the exact controller. For example, two IAW5AF or MJD6 units can have different OEM numbers, hardware versions and software configurations.

Lancia Y / Ypsilon 1.2 – IAW16FET / 46524188

One catalogue example is the Lancia Y / Ypsilon 1.2 ECU IAW16FET / 46524188.

Important references include:

• IAW16FET,
• IAW 16F.ET,
• 61602.108.00,
• 6160210800,
• 46524188.

When several references are present on the unit, the complete combination should be compared with the original ECU.

Lancia Ypsilon 1.3 JTD – MJD6JF.Y1 / 55202548

Diesel Ypsilon models use different Magneti Marelli MJD controllers. One confirmed example is the Lancia Ypsilon 1.3 JTD ECU 55202548 / MJD6JF.Y1.

Its main identification numbers include:

• 55202548,
• MJD6JF.Y1,
• MJD 6JF.Y1/HW01C/1092-Y160,
• 71600.007.04,
• 7160000704.

The full HW suffix is useful when distinguishing similar MJD6JF variants.

Lancia Ypsilon MJD ECU families

Several different MJD versions appear in Lancia Ypsilon applications, including:

• MJD6E3.Y1 / 51805375,
• MJD6F3.Y2 / 51795235,
• MJD6F3.Y5 / 51825023,
• MJD6JF.Y1 / 55202548.

These similar MJD designations should not automatically be treated as interchangeable. The complete OEM, MJD and hardware numbers must be checked.

Lancia Ypsilon – IAW5AF.N8

Another important petrol ECU family is IAW5AF.N8.

The catalogue includes examples such as:

• 51758233 / IAW5AF.N8,
• 55193443 / IAW5AF.N8 / HW306.

The same IAW family can therefore appear with different OEM and hardware numbers.

Lancia Lybra – Magneti Marelli IAW49F.B1

A useful long-tail example is the Lancia Lybra Magneti Marelli IAW49F.B1 / 6160034003 ECU.

Important references include:

• IAW 49F.B1,
• IAW49FB1,
• 61600.340.03,
• 6160034003.

Searching with both the IAW designation and full numeric reference gives more precise results.

Bosch Lancia engine control units

Bosch ECUs are also used in many Lancia petrol and diesel applications.

Common number families include:

• 026120... for selected petrol engine management systems,
• 028000... on older systems,
• 028101... on many diesel engine controllers.

A shared Bosch prefix does not confirm compatibility. The complete ten-digit Bosch number and the corresponding Lancia / Fiat Group OEM reference should be compared.

Lancia Thesis 2.4 JTD – Bosch 0281011554 / 55193526

One confirmed Bosch diesel ECU is the Lancia Thesis 2.4 JTD Bosch 0281011554 / 55193526.

The key numbers are:

• 0 281 011 554,
• 0281011554,
• 55193526.

Another Thesis 2.4 JTD version listed in the catalogue uses 0281012964 / 55207464, showing why the engine model alone is not enough for selection.

Lancia Thema – Bosch ECU numbers

Older Lancia Thema models also use several Bosch controllers.

Examples include:

• 0261200980 / 1267357196,
• 0280000370,
• 0280000324,
• 0280000351.

These are different controllers even though they can all be associated with the Thema model family.

Lancia Lybra Bosch ECUs

Lancia Lybra also appears with Bosch electronics, including units such as:

• 0261206172,
• 0281010743 / 55186491 / 73501145.

This demonstrates why a category should not associate one Lancia model with only one ECU manufacturer.

IAW and MJD – what is the difference?

IAW and MJD are Magneti Marelli engine-management families used across different engines and generations.

IAW units are commonly found in various petrol applications, while MJD families are strongly associated with Fiat Group diesel systems such as MultiJet / JTD applications.

However, the family name alone should never be used as proof of compatibility.

Why OEM numbers are important on Lancia ECUs

A Lancia ECU can carry several different references at the same time:

• vehicle OEM number,
• Bosch or Magneti Marelli number,
• hardware reference,
• software reference,
• production or calibration code.

For example, an MJD ECU may share the same general family designation with another unit while having a different OEM number and HW version.

Common symptoms of a Lancia ECU problem

Possible symptoms may include:

• engine does not start,
• intermittent starting problems,
• loss of communication with the engine ECU,
• limp mode,
• reduced engine power,
• irregular engine operation,
• internal ECU fault codes,
• incorrect control of selected engine circuits.

These symptoms do not automatically confirm a faulty ECU.

No communication with the Lancia ECU

Before replacing an engine controller because of a communication fault, check:

• ECU power supply,
• ground connections,
• fuses and relays,
• connector pins,
• CAN or diagnostic wiring,
• water ingress or corrosion,
• vehicle battery condition.

A wiring or power-supply problem can produce the same symptom as an internally damaged ECU.

Does a used Lancia ECU require programming?

There is no single replacement procedure for every Lancia ECU.

Depending on the controller and vehicle, a replacement may require:

• programming or diagnostic adaptation,
• immobiliser synchronisation,
• preparation as a reusable or virgin unit,
• security-code procedures,
• data transfer from the original ECU,
• cloning.

Available options depend on the exact ECU and vehicle. See ECU preparation options for more information.

Can a Lancia engine ECU be cloned?

For selected Bosch and Magneti Marelli controllers, required data can be transferred from the original ECU to a compatible replacement unit.

The possibility of cloning depends on the ECU type and condition of the original controller. If the damaged unit cannot be read, another preparation method may be required.

How to search for a Lancia ECU by part number

Useful search combinations include:

• Lancia Ypsilon ECU 46524188 IAW16FET,
• Lancia Ypsilon ECU 55202548 MJD6JFY1,
• Lancia Ypsilon ECU 51805375 MJD6E3Y1,
• Lancia Lybra ECU IAW49FB1 6160034003,
• Lancia Thesis ECU 0281011554 55193526,
• Lancia Thesis ECU 0281012964 55207464,
• Lancia Thema ECU 0261200980 1267357196,
• Lancia Lybra ECU 0281010743 55186491.

Searching with both the manufacturer number and OEM reference normally gives better results than searching only by model and engine capacity.

Selected Lancia engine control units

For Lancia Y / Ypsilon petrol applications, see the IAW16FET / 46524188 engine ECU.

For Ypsilon 1.3 JTD applications, the catalogue includes the MJD6JF.Y1 / 55202548 controller.

For Lybra, one Magneti Marelli example is the IAW49F.B1 / 6160034003 ECU.

For Lancia Thesis 2.4 JTD, see the Bosch 0281011554 / 55193526 engine control unit.

Related categories and manufacturers

• All Engine Control Units – ECU / ECM
• Magneti Marelli Automotive Electronics
• Bosch Automotive Electronics
• ECU Preparation Options
• Electronic Car Parts

How to confirm compatibility before ordering

If you are unsure which Lancia ECU is correct, contact Auto24Parts.

For compatibility verification, send:

• a clear photo of the complete original ECU label,
• all Bosch or Magneti Marelli numbers,
• vehicle OEM number,
• HW and SW references where visible,
• Lancia model,
• production year,
• engine version.

The complete part-number combination from the original ECU is the safest basis for selecting a replacement controller.

Ordering, Payment, Delivery and Returns

Ordering information is available in our How to Buy guide. Payment options are listed under Secure Payment Methods, while shipping information can be found on the Shipping & Delivery page.

Current information about returns, complaints and warranty is available under Returns, Warranty & Complaints.

FAQ – Lancia Engine Control Units