Ferrari DCT Gearbox ECU Module 855811

Original Ferrari DCT gearbox control module / ECU, OEM part number 855811, designed for compatible Ferrari applications. Ferrari parts catalogues identify 855811 as a Marelli DCT Gearbox ECU, used across the 296, Portofino, Roma, Purosangue, SF90, and 12 Cilindri model families. The unit is also listed for several newer derivatives, including Roma Spider, Portofino M, SF90 Spider and SF90 variants.

The component is offered in the condition shown in the product photographs and is suitable for Ferrari specialists, workshops, electronic repair professionals, and customers looking for an original replacement gearbox control module.

Specifications

• Product: DCT Gearbox ECU / Transmission Control Module
• Brand: Ferrari
• OEM Part Number: 855811
• Manufacturer: Marelli
• Part Type: Transmission Control Module / DCT ECU
• Condition: Used, as shown in product pictures
• Application: Ferrari DCT transmission system
• Programming: Verify whether the supplied unit is programmed or requires programming
• Fitment: Verify by VIN and original ECU reference
• Installation: Professional installation and diagnostic setup recommended

Ferrari parts documentation identifies 855811 as a DCT Gearbox ECU – Marelli Unprogrammed.

Compatibility

The Ferrari 855811 DCT ECU is catalogued for multiple Ferrari model families, including:

Ferrari 296
Ferrari Portofino
Ferrari Roma
Ferrari Purosangue
Ferrari SF90
Ferrari 12 Cilindri

Current Ferrari parts catalogues also list the reference for 296 GTB/GTS, Portofino M, Roma/Roma Spider, Purosangue, SF90 Stradale/Spider and SF90 XX derivatives.

Exact compatibility must be verified using the VIN, transmission specification, software version, original ECU number, and vehicle configuration. A matching part number alone does not guarantee that a used control unit is immediately plug-and-play.

Original Ferrari Transmission ECU

This genuine Ferrari DCT gearbox electronic control unit manages functions associated with the vehicle’s dual-clutch transmission. A replacement ECU may be required when the original module has suffered electronic failure, communication faults, water or impact damage, or other transmission-control problems.

Because this is an electronic control module, buyers should carefully inspect the product photographs for housing damage, connector damage, corrosion, broken mounting points, and signs of previous use.

The exact condition is as shown in the product pictures.

Ferrari 296, Roma, SF90, Purosangue & More

The OEM reference 855811 is particularly useful for customers searching for a Ferrari DCT ECU, Ferrari gearbox control module, Ferrari transmission computer, or Marelli 855811 control unit.

Ferrari catalogues show the module as unprogrammed in new-part applications. A used unit may therefore require programming, coding, initialization, or adaptation to the vehicle before normal operation. This should be confirmed with a Ferrari specialist before installation.

Installation and Programming

Installation should be carried out by a qualified Ferrari technician or specialist automotive electronics workshop. Before fitting, compare the replacement ECU with the original for part number, connectors, housing design, mounting points, software requirements, and transmission configuration.

After installation, professional diagnostic equipment may be required to program or initialize the ECU and verify communication with the DCT transmission and vehicle control systems.

For accurate compatibility confirmation, provide the Ferrari VIN, model year, exact Ferrari model, gearbox specification, original ECU number, and available software or identification information before ordering.