Rover Engine Control Units – ECU, MEMS, Bosch and Siemens

Rover ECU – Engine Control Unit and Engine Computer

A Rover engine control unit manages the operation of the engine and communicates with other electronic systems in the vehicle. Depending on the model and generation, the controller may be described as ECU, ECM, engine computer or, in many older Rover applications, by the MEMS engine-management family.

Rover used several different engine-management systems across models such as the 25, 45, 75, 200, 400, 600 and Metro. For this reason, the vehicle model or engine capacity alone should not be used to select a replacement controller.

How to choose the correct Rover ECU

Before ordering, compare all references shown on the original controller.

Important information can include:

• complete Rover ECU number,
• manufacturer number,
• all suffix letters,
• additional identification codes,
• hardware or software references where present,
• vehicle model and engine version as supporting information.

Two Rover ECUs can look identical and use the same connectors while having different internal calibration or immobiliser data.

Rover MNE engine control units

One of the characteristic Rover ECU number families uses the prefix MNE....

Examples found in Rover applications include:

• MNE10015,
• MNE10050,
• MNE10051,
• MNE10086,
• MNE10089,
• MNE101070.

The complete MNE number should always be checked because similar references may correspond to different engines or vehicle versions.

Rover Metro – MNE10015

A typical example from the older Rover range is the Rover Metro 1.1 ECU MNE10015 / 27924014.

Important search references include:

• MNE10015,
• MNE 10015,
• 2792 4014,
• 27924014.

Both compact and spaced number formats can be useful when searching for an older Rover engine computer.

Rover MKC engine control units

Another important Rover family uses MKC... references.

Examples include:

• MKC104011,
• MKC104020,
• MKC104021,
• MKC104031,
• MKC104042,
• MKC101460,
• MKC101600,
• MKC101960.

The final letters and additional short codes are part of the identification and should not be ignored.

Rover 214 – MKC104021 FE 4086

One current example is the Rover 214 1.4 ECU MKC104021 FE 4086.

The identifying references include:

• MKC104021,
• FE,
• 4086.

When comparing this controller, the complete reference should be used rather than searching only for MKC104.

Rover 214 / 414 – MKC104020

Another Rover ECU family example is MKC104020 / 3116 WK / 4086, used in selected Rover 214i and 414i applications.

This demonstrates how very similar MKC references can represent different controller versions.

Rover Metro GTI – MKC101460 MQ

The catalogue also contains the Rover Metro 1.4 GTI ECU MKC101460 MQ.

The short suffix MQ forms part of the complete identification and should be checked together with MKC101460.

Rover 75 engine control units

Rover 75 used several different engine-management systems depending on engine type.

The catalogue includes examples from:

• Bosch diesel engine management,
• Siemens petrol engine management,
• Rover / Motorola NNN-series controllers.

This means that the phrase “Rover 75 ECU” alone is too broad to identify the correct part.

Rover 75 2.0 CDT – Bosch 0281001895 / NNN100692

A confirmed diesel example is the Rover 75 2.0 CDT Bosch 0281001895 ECU.

The controller carries several important references:

• Bosch 0 281 001 895,
• 0281001895,
• DDE 7785541,
• 28RTE522,
• NNN100692.

For this type of ECU, comparing the complete Bosch number together with the Rover references gives much more precise identification.

Rover 75 / MG ZT 2.5 V6 – Siemens S108847002B

For selected 2.5 V6 applications, the catalogue includes the Siemens S108847002B / NNN100655 A0009 ECU.

Important references include:

• S108847002B,
• S108847002 B,
• NNN100655,
• A0009.

The Siemens reference and Rover NNN number should be checked together.

Rover 75 / MG ZT – Siemens S108847003A

A similar but different controller is identified by:

• S108847003A,
• NNN000170,
• A0009,
• HG.

This is a good example of why S108847002B and S108847003A should not automatically be considered interchangeable.

Rover NNN engine ECU numbers

Later Rover controllers commonly use NNN... references.

Examples include:

• NNN000110,
• NNN000170,
• NNN000500,
• NNN100655,
• NNN100682,
• NNN100683,
• NNN100692.

These references are especially useful when searching for Rover 75 and related engine-management units.

Rover 75 1.8 – NNN000110 / NNW006410

One Rover 75 1.8 controller is identified by:

• NNN000110,
• NNW006410.

The NNN and NNW references should be compared together when they both appear on the original ECU.

Bosch Rover engine ECUs

Bosch engine controllers are found in selected Rover diesel applications.

Typical Bosch references begin with:

• 028100...,
• 028101....

The shared prefix does not confirm compatibility. The complete ten-digit Bosch number and all Rover-specific references should be checked.

Siemens Rover engine ECUs

Siemens supplied engine controllers for selected Rover and MG applications.

Examples include:

• S108847002B / NNN100655,
• S108847003A / NNN000170.

A single letter or final digit in a Siemens reference can identify a different ECU version.

Rover ECU vs Honda-based engine management

Some older Rover models used engines and electronics related to Honda systems. For this reason, certain Rover engine controllers may use references such as 37820....

However, this does not mean that every Honda ECU with a similar number is suitable for a Rover. The complete part number and application must be verified.

Common symptoms of a Rover ECU problem

Possible symptoms can include:

• engine does not start,
• intermittent starting problems,
• loss of communication with the ECU,
• engine running unevenly,
• limp mode or reduced power,
• internal ECU fault codes,
• no control of a specific engine circuit,
• immobiliser-related starting problems.

These symptoms do not automatically confirm that the engine control unit itself is faulty.

No communication with Rover ECU – what should be checked?

Before replacing the controller, check:

• ECU power supply,
• ground connections,
• fuses and relays,
• connector condition,
• damaged or corroded pins,
• vehicle communication wiring,
• immobiliser or security-system faults where relevant.

A vehicle-side wiring fault can produce symptoms similar to an internally damaged ECU.

Does a used Rover ECU require programming?

There is no single replacement procedure for every Rover ECU.

Depending on the controller and vehicle, possible options can include:

• installation of a locked used ECU requiring further preparation,
• ECU reset or unlocking,
• immobiliser synchronisation,
• programming or adaptation,
• security-code or configuration procedures,
• data transfer from the original ECU,
• cloning to a compatible replacement.

Not every preparation method is available for every controller.

See ECU preparation options for more information.

Can a Rover ECU be cloned?

For selected Rover controllers, required data can be transferred from the original ECU to a compatible replacement.

The possibility depends on the ECU type and condition of the original module. If the damaged controller cannot be read, a different preparation method may be required.

Why exact suffixes matter

Rover engine-management references often contain short suffixes or additional codes.

Examples include:

• MKC104011 FD,
• MKC104021 FE,
• MKC101460 MQ,
• S108847002B,
• S108847003A.

These letters form part of the complete identification and should be retained when searching for a replacement.

How to search for a Rover ECU by part number

Useful search combinations include:

• Rover 214 ECU MKC104021 FE 4086,
• Rover 200 ECU MKC104011 FD,
• Rover Metro ECU MNE10015 27924014,
• Rover 75 ECU NNN000110 NNW006410,
• Rover 75 2.0 CDT ECU 0281001895 NNN100692,
• Rover 75 Siemens S108847002B NNN100655,
• Rover 75 MG ZT S108847003A NNN000170.

Searching with two or more numbers from the original label usually produces much more precise results than searching only by vehicle model.

Selected Rover engine control units

Examples include the Rover 214 MKC104021 FE 4086 ECU, the Rover Metro 1.4 GTI MKC101460 MQ controller, the Rover 75 2.0 CDT Bosch 0281001895 / NNN100692 ECU and the Rover 75 / MG ZT Siemens S108847002B / NNN100655 controller.

Related engine ECU categories

• All Engine Control Units – ECU
• ECU Preparation Options
• Bosch Automotive Electronics
• Siemens Automotive Electronics
• Electronic Car Parts

How to confirm Rover ECU compatibility before ordering

If you are unsure which engine controller is correct, contact Auto24Parts.

For compatibility verification, send:

• a clear photo of the complete original ECU label,
• all MNE, MKC, NNN, Bosch or Siemens numbers,
• all suffix letters and additional codes,
• Rover model,
• production year,
• engine capacity and engine version.

The complete number combination from the original ECU is more reliable than the vehicle model alone.

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 – Rover Engine Control Units